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  • General Chemistry  (8,321)
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  • 1
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    Was sind Gene nicht? (2024)
    transcript Verlag | transcript Verlag
    Details
    Publication Date: 2024-03-22
    Description: Gene gelten im Allgemeinen als die Essenz eines Lebewesens, die all seine charakteristischen Eigenschaften bestimmt. Aus biologischer Sicht trifft diese Vorstellung jedoch längst nicht mehr zu. Im Mittelpunkt dieses Buches steht daher die Frage, warum und wie das essentialistische Denken die gesellschaftliche Wahrnehmung biologischer Forschungsprojekte immer noch beeinflusst. Anhand aktueller Erkenntnisse der Genetik und Epigenetik geht Kirsten Schmidt auf die Suche nach einer neuen Interpretation des Genbegriffs im Zeitalter der Postgenomik. Das Verständnis von Genen als dynamischen Prozessen erweist sich dabei als eine fruchtbare Alternative zum Essentialismus.
    Keywords: Essentialismus ; Gen ; Philosophie ; Epigenetik ; Biologie ; Genetik ; Postgenomik ; Leben ; Wissenschaft ; Wissenschaftsphilosophie ; Naturphilosophie ; Wissenschaftssoziologie ; Soziologie ; Philosophy ; Biology ; Life ; Science ; Philosophy of Science ; Philosophy of Nature ; Sociology of Science ; Sociology ; bic Book Industry Communication::P Mathematics & science::PD Science: general issues::PDA Philosophy of science ; bic Book Industry Communication::H Humanities::HP Philosophy::HPJ Philosophy: metaphysics & ontology ; bic Book Industry Communication::P Mathematics & science::PD Science: general issues::PDR Impact of science & technology on society
    Language: German
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  • 2
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    Quantification of bone surface textures: exploring a new method of ontogenetic ageing (2023)
    In:  Journal of Analytical Science and Technology vol. 14 no. 1
    Details
    Publication Date: 2024-02-26
    Description: Identifcation of ontogenetic age classes plays an important role in the felds of zoology, palaeontology and archaeology, where accurate age classifcations of (sub)fossil remains are a crucial component for the reconstruction \nof past life. Textural ageing\xe2\x80\x94the identifcation of age-related bone surface textures\xe2\x80\x94provides a size-independent \nmethod for age assessment of vertebrate material. However, most of the work so far is limited to qualitative results. \nWhile qualitative approaches provide helpful insights on textural ageing patterns, they are heavily subject to observer \nbias and fall short of quantitative data relevant for detailed statistical analyses and cross-comparisons. Here, we present a pilot study on the application of 3D surface digital microscopy to quantify bone surface textures on the long \nbones of the grey heron (Ardea cinerea) and the Canada goose (Branta canadensis) using internationally verifed \nroughness parameters. Using a standardised measuring protocol, computed roughness values show a strong correlation with qualitative descriptions of textural patterns. Overall, higher roughness values correspond to increased numbers of grooves and pits and vice versa. Most of the roughness parameters allowed distinguishing between diferent \nontogenetic classes and closely followed the typical sigmoidal animal growth curve. Our results show that bone \ntexture quantifcation is a feasible approach to identifying ontogenetic age classes.
    Keywords: General Physics and Astronomy ; General Environmental Science ; General Biochemistry ; Genetics and Molecular Biology ; General Materials Science ; General Chemistry ; Roughness ; Surfaces ; Taphonomy ; Topography ; Bone ; Ontogeny ; Digital microscopy
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
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    Dějiny Biologického ústavu Lékařské fakulty Masarykovy univerzity (2023)
    Masaryk University Press | Masaryk University
    Details
    Publication Date: 2024-04-04
    Description: Title in English: History of the Institute of Biology, Faculty of Medicine, Masaryk University A representative book on the history and present of one of the oldest institutes of the Faculty of Medicine of Masaryk University, which has been contributing significantly to the development of biological sciences since its inception.
    Keywords: Historical sciences ; Historyof Medicine ; health care ; Personalities ; Natural science ; Biology ; thema EDItEUR::P Mathematics and Science::PD Science: general issues::PDX History of science
    Language: Czech
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  • 4
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    Experimentierprozesse von Lehramtsstudierenden der Biologie -- Eine Videostudie (2022)
    Logos Verlag Berlin | Logos Verlag Berlin
    Details
    Publication Date: 2024-04-04
    Description: In Zeiten, in denen die Komplexität gesellschaftlicher, politischer, wirtschaftlicher und technologischer Probleme zunehmend steigt, ist der Erwerb einer naturwissenschaftlichen Grundbildung für die persönliche Meinungsbildung von zentraler Bedeutung. Hierzu gehört das Erlernen von naturwissenschaftlichen Erkenntnismethoden wie dem Experimentieren. Erkenntnisse zu experimentierspezifischen Kompetenzen zeigen, dass Lernende über unterschiedliche Vorstellungen bezüglich des Experimentierens verfügen. Diese zeigen sich in unterschiedlichen Vorgehensweisen, die mehr oder weniger stark von der Vorgehensweise in realer wissenschaftlicher Forschung abweichen. Ziel der vorliegenden Studie ist eine differenzierte Erfassung und Analyse individueller Prozessstrukturen sowie prozessbezogener Niveaustufen von Experimentierprozessen Lehramtsstudierender der Biologie. Die Ergebnisse zeigen, dass die meisten Experimentierprozesse nicht, wie in idealisierten Modellen angenommen, einem linearen Prozessverlauf verlaufen, sondern wiederholte Wechsel zwischen den Experimentierphasen aufweisen. Insbesondere die Durchführung nimmt hier eine zentrale Stellung ein. Die Vernetzung der Experimentierphasen ist unterschiedlich ausgeprägt und steht in einem positiven Zusammenhang mit der Qualität eines Experimentierprozesses. Die prozessbezogenen Niveaustufen weisen Ausprägungen über alle Niveaus hinweg auf. Aus den Ergebnissen werden Hinweise zur Gestaltung von Unterricht und universitärer Lehre sowie Implikationen für die fachdidaktische Forschung abgeleitet.
    Keywords: Science ; Science ; Life Sciences ; Biology ; Education ; thema EDItEUR::P Mathematics and Science::PD Science: general issues ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences ; thema EDItEUR::J Society and Social Sciences::JN Education
    Language: German
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  • 5
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    The Blurring of Boundaries in Bioscientific Discourse (2022)
    Logos Verlag
    Details
    Publication Date: 2024-04-05
    Description: New technologies have revealed previously unknown and invisible parts of the human body and made it visible at the molecular level, revealing in turn more detailed structures and arrangements than those which were previously available. In doing so, in many ways they refine, expand, and even completely overturn forms of contemporary knowledge. This book maps the shifts and blurring of boundaries in contemporary bioscientific discourse. The authors of its chapters trace the shifts of boundaries in terms of the gradual blurring of the validity of established concepts, interpretive frameworks, and standards of judgment, which are analysed from ontological, gnoseological, ethical, and social perspectives. At the same time, they also map the blurring of boundaries in terms of the interdisciplinary crossing of boundaries between various scientific and artistic disciplines. The shifting of boundaries ultimately forms a part of these boundaries’ definition; upon the basis of a rationally guided discussion, these shifts can be guided and corrected so as to avoid any irreversible damage. Jana Tomašovičová is a philosopher with a special interest in contemporary philosophy and bioethics. She analyses the impact of biotechnology on traditional social, ethical, and anthropological concepts and their relevance in new conditions. She is an associate professor at the Faculty of Arts, University of Ss. Cyril and Methodius in Trnava, Slovakia. During her bioethics research, she conducted short research stays at the universities of Bonn, Heidelberg, Tübingen, and Zürich.
    Keywords: Science ; Life Sciences ; Biology ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
    Language: English
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  • 6
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    The Endangered Species Act (2021)
    Taylor & Francis | CRC Press
    Details
    Publication Date: 2023-09-12
    Description: The complex regulations of the Endangered Species Act established by the U.S. Fish and Wildlife Service can be challenging for environmental professionals who must comply with them or assist clients in compliance. This is true especially for those without a background in biology or ecology. The Endangered Species Act: History, Implementation, Successes, and Controversies discusses the Act using clear scientific prose that all professionals whose activities fit into the ESA compliance process can readily comprehend, including those with limited education in science. The book begins by exploring the deeply rooted history of the Endangered Species Act, which extends back decades preceding its enactment in 1973. It continues with a discussion of the basic scientific theory underlying the Act and provides an overview of its key regulations. The author also examines the Act in the context of other key environmental planning statutes such as the National Environmental Policy Act and the Clean Water Act, especially Section 404 of the Clean Water Act, which relates specifically to wetlands. The remainder of the book details the regulatory processes faced by other government agencies and private developers who must routinely ensure that their actions comply with the Endangered Species Act. It concludes with a broad discussion of current controversies associated with the Act and how those controversies might ultimately change how environmental practitioners will have to comply with the Act in the future. The book is neither a defense of the Endangered Species Act and its associated regulations nor a call to repeal or modify the Act or regulations. The presentation is factual and avoids the hype and hyperbole commonly directed at the Act by both environmental activists and deregulation proponents. Readers will gain a solid understanding of how the Act was established, what goals were envisioned by its framers, how current environmental practice under the Act has been shaped, and how those practices might be changed in the future.
    Keywords: Environment law ; Applied ecology ; Biology ; life sciences ; Zoology & animal sciences ; bic Book Industry Communication::L Law::LN Laws of Specific jurisdictions::LNK Environment, transport & planning law::LNKJ Environment law ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RN The environment::RNC Applied ecology ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences::PSV Zoology & animal sciences
    Language: English
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  • 7
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    Bloomsbury Scientists (2021)
    UCL Press
    Details
    Publication Date: 2024-03-23
    Description: Bloomsbury Scientists is the story of the network of scientists and artists living in a square mile of London before and after the First World War. This inspired group of men and women viewed creativity and freedom as the driving force behind nature, and each strove to understand this in their own inventive way. Their collective energy changed the social mood of the era and brought a new synthesis of knowledge to ideas in science and art. Class barriers were threatened as power shifted from the landed oligarchy to those with talent and the will to make a difference. A time of unexpected opportunities, from the new disciplines of Genetics and Ecology to Post-Impressionism and beyond, Michael Boulter seamlessly weaves together the stories originating from Bloomsbury’s laboratories, libraries and studios. He narrates the breakthroughs of scientists such as Ray Lankester and Marie Stopes alongside the creative outputs of H. G. Wells and Virginia Woolf, among many others, and intricately connects them all through personal friendships, grievances, quarrels and affections. Bloomsbury Scientists offers a fresh and crucial perspective on this history at a time when the complex relationship between science and art continues to be debated.
    Keywords: london ; history of science ; bloomsbury ; scientists ; Biology ; Charles Darwin ; Evolution ; Francis Galton ; thema EDItEUR::1 Place qualifiers::1D Europe::1DD Western Europe::1DDU United Kingdom, Great Britain ; thema EDItEUR::N History and Archaeology::NH History::NHD European history ; thema EDItEUR::P Mathematics and Science::PD Science: general issues::PDX History of science
    Language: English
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  • 8
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    Polyoxometalates in Catalysis, Biology, Energy and Materials Science (2021)
    Frontiers Media SA
    Details
    Publication Date: 2024-04-04
    Description: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact
    Keywords: polyoxometalates ; Catalysis ; Biology ; Energy ; Materials Science ; magnetic materials ; active matter ; Water-oxidation ; Keggin ; supramolecular chemistry ; thema EDItEUR::P Mathematics and Science::PD Science: general issues
    Language: English
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  • 9
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    Frontiers in Chemistry: Rising Stars (2021)
    Frontiers Media SA
    Details
    Publication Date: 2024-04-04
    Description: The Frontiers in Chemistry Editorial Office team are delighted to present the inaugural “Frontiers in Chemistry: Rising Stars” article collection, showcasing the high-quality work of internationally recognized researchers in the early stages of their independent careers. All Rising Star researchers featured within this collection were individually nominated by the Journal’s Chief Editors in recognition of their potential to influence the future directions in their respective fields. The work presented here highlights the diversity of research performed across the entire breadth of the chemical sciences, and presents advances in theory, experiment and methodology with applications to compelling problems. This Editorial features the corresponding author(s) of each paper published within this important collection, ordered by section alphabetically, highlighting them as the great researchers of the future. The Frontiers in Chemistry Editorial Office team would like to thank each researcher who contributed their work to this collection. We would also like to personally thank our Chief Editors for their exemplary leadership of this article collection; their strong support and passion for this important, community-driven collection has ensured its success and global impact.
    Keywords: Green and Sustainable Chemistry ; Analytical Chemistry ; Theoretical and Computational Chemistry ; Polymer Chemistry ; Medicinal and Pharmaceutical Chemistry ; Organic Chemistry ; Nanoscience ; Catalysis and Photocatalysis ; Supramolecular Chemistry ; Electrochemistry ; Inorganic Chemistry ; Chemical Biology ; thema EDItEUR::P Mathematics and Science::PD Science: general issues
    Language: English
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  • 10
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    Nanofibres: Friend or Foe? (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-05
    Description: Nanofibers, particularly those of a carbonaceous content, have received increased interest in the past two decades due to their outstanding physico-chemical characteristics and their possibility to form and contribute towards a plethora of potentially advantageous materials for consumer, industrial and medical applications. Despite this, and together with the numerous research studies and published articles that have sought to investigate these aspects, the potential impact of CNTs is still not understood. Whether or not nanofibers may be able to provide a sophisticated alternative to conventional materials is still debatable, whilst their effects upon both environmental and human health are highly equivocal. How nanofibers are conceived can determine how they may interact with different environments, such as the human body. Understanding each key step of the synthesis and production of nanofibers to their use within potential applications is therefore essential in gaining an insight into how they may be perceived by any biological system and environment. Thus, obtaining such information will enable all scientific communities to begin to realize the potential advantages posed by nanofibers. The aim of this Special Issue therefore, was to provide a collective overview of nanofibers; ‘from synthesis to application’. The Issue particularly focuses upon carbon-based nanofibers, but also highlights alternative nanofiber types. Emphasis is given holistically, with articles discussing the production routes of nanofibers, their plight during their life-cycle (origin to applied form and effects over time), as well as how nanofibers could either incite conflict, or provide aid to human and environmental health.
    Keywords: QD1-999 ; Toxicology ; Chemistry ; Biology ; Material Science ; Nanofibers ; Nanotechnology ; thema EDItEUR::P Mathematics and Science::PN Chemistry
    Language: English
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  • 11
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    Wahrnehmung - Kognition - Ästhetik (2021)
    transcript Verlag
    Details
    Publication Date: 2021-02-10
    Description: Wahrnehmung, Kognition und Ästhetik lassen sich als differente Verarbeitungs- und Ausdrucksformen einer biologischen Basisausstattung des Menschen verstehen. Ob diese stabil sind oder ob sie kulturell überformt oder gar transformiert werden, bildet die zentrale medienanthropologische Fragestellung des Bandes. Dabei wird geprüft, welcher Art die wechselseitigen Impulse sind, die zu kulturellen und biologischen Veränderungen führen können, welche Wirkung sie besitzen und welche Dauer ihnen zukommt. Diese Fragen richten sich nicht allein auf Prozesse wahrnehmungstechnischer, kognitiver oder ästhetischer Habitualisierungen, sondern thematisieren deren physiologische Voraussetzungen. Mit der Beteiligung ausgewiesener Forscher aus den Bereichen Biologie, Medizin und Hirnforschung erschließt dieser Band Neuland im Grenzgebiet der Natur- und Kulturwissenschaften.
    Keywords: Wahrnehmung ; Kognition ; Ästhetik ; Medien ; Biologie ; Hirnforschung ; Medienästhetik ; Medienwissenschaft ; Aesthetics ; Media ; Biology ; Media Aesthetics ; Media Studies ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFD Media studies
    Language: German
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  • 12
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    The Szczecin Lagoon Ecosystem. The Biotic Community of the Great Lagoon and its Food Web Model (2021)
    De Gruyter
    Details
    Publication Date: 2024-04-05
    Description: The Great Lagoon is a central part of the Szczecin Lagoon, a major component in the Odra River estuary system. It is also an important European natural heritage site and one of the largest resting places for migratory birds in the Baltic Sea area. The first part of Wolnomiejski's and Witek’s book gives a thorough overview of the most up-to-date knowledge of this region, including the assessment of its biological production. Based on these findings authors develop a food web model of the Polish part of the Szczecin Lagoon, identifying a total of 45 trophic-functional components. The model describes a variety of features ranging from the magnitude of consumption, to the amount of unassimilated food and export of individual system components, and serves as an invaluable source, helping researchers to estimate various ecological indicators of The Great Lagoon’s ecosystem.
    Keywords: QH301-705.5 ; Biology ; Natural Sciences ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences
    Language: English
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  • 13
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    Johann Friedrich Blumenbach (2021)
    Universitätsverlag Göttingen
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    Publication Date: 2024-04-04
    Description: This bibliography documents the printed works of Johann Friedrich Blumenbach (1752–1840) and makes them accessible for research purposes. Blumenbach was Professor of Medicine and Natural History at the University of Göttingen. He was one of the leading exponents of the revolutionary change of the geo-biological concept of the world at the turn of the 18th to the 19th century. His works exemplarily show the interactions between the life sciences, the humanities and the social sciences of his day.
    Keywords: History of Universities ; Bibliography ; Biology ; History of Science ; Darwinism ; thema EDItEUR::P Mathematics and Science::PD Science: general issues ; thema EDItEUR::J Society and Social Sciences::JN Education::JNM Higher education, tertiary education ; thema EDItEUR::G Reference, Information and Interdisciplinary subjects::GB Encyclopaedias and reference works::GBC Reference works::GBCR Bibliographies, catalogues ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences ; thema EDItEUR::P Mathematics and Science::PD Science: general issues::PDX History of science
    Language: German
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  • 14
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    A more developed sign: interpreting the work of Jesper Hoffmeyer (2021)
    University of Tartu Press
    Details
    Publication Date: 2022-04-28
    Description: For more than 40 years, Jesper Hoffmeyer has been committed to the idea of developing “a semiotics of nature, or biosemiotics as he chose to call this effort, that could intelligibly explain how all the phenomena of inherent meaning and signification in living nature – from the lowest level of sign processes in unicellular organisms to the cognitive and social behavior of animals – can emerge from a universe that was not so organized and meaningful from the very beginning” (Emmeche et al. 2002: 41). In this volume, over 80 world-class scholars from more than 20 countries select a short quotation taken from any of Jesper Hoffmeyer’s texts and provide their scholarly commentary upon that passage – whether in the form of an analytical explication, a critical disagreement or a conceptual extension – that as they feel asks the questions that need to be asked, proposes the ideas that need to be proposed, or that draws out the implications that need to be so explicitly drawn out, germane to the claims of the selected passage. At once a celebration and a serious academic development of the work of Jesper Hoffmeyer, this landmark volume marks the occasion of his 70th birthday on February 21, 2012.
    Keywords: jesper hoffmeyer ; semiotics ; biosemiotics ; Biology ; Charles Sanders Peirce ; Evolution ; Semiosis ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GT Interdisciplinary studies::GTE Semiotics / semiology
    Language: English
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  • 15
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    Plastidules to Humans - Leopoldo Maggi (1840-1905) and Ernst Haeckel´s naturalist philosophy in the Kingdom of Italy (2021)
    Universitätsverlag Göttingen
    Details
    Publication Date: 2024-04-08
    Description: The name DGGTB (Deutsche Gesellschaft für Geschichte und Theorie der Biologie; German Society for the History and Theory of Biology) reflects recent history as well as German tradition. The Society is a relatively late addition to a series of German societies of science and medicine that began with the »Deutsche Gesellschaft für Geschichte der Medizin und der Naturwissenschaften«, founded in 1910 by Leipzig University's Karl Sudhoff (1853-1938), who wrote: »We want to establish a ,German' society in order to gather German-speaking historians together in our special disciplines so that they form the core of an international society...«. Yet Sudhoff, at this time of burgeoning academic internationalism, was »quite willing« to accommodate the wishes of a number of founding members and »drop the word German in the title of the Society and have it merge with an international society«. The founding and naming of the Society at that time derived from a specific set of historical circumstances, and the same was true some 80 years later when in 1991, in the wake of German reunification, the »Deutsche Gesellschaft für Geschichte und Theorie der Biologie« was founded. From the start, the Society has been committed to bringing studies in the history and philosophy of biology to a wide audience, using for this purpose its Jahrbuch für Geschichte und Theorie der Biologie. Parallel to the Jahrbuch, the Verhandlungen zur Geschichte und Theorie der Biologie has become the by now traditional medium for the publication of papers delivered at the Society's annual meetings. In 2005 the Jahrbuch was renamed Annals of the History and Philosophy of Biology, reflecting the Society's internationalist aspirations in addressing comparative biology as a subject of historical and philosophical studies.
    Description: The name DGGTB (Deutsche Gesellschaft für Geschichte und Theorie der Biologie; German Society for the History and Theory of Biology) reflects recent history as well as German tradition. The Society is a relatively late addition to a series of German societies of science and medicine that began with the »Deutsche Gesellschaft für Geschichte der Medizin und der Naturwissenschaften«, founded in 1910 by Leipzig University's Karl Sudhoff (1853-1938), who wrote: »We want to establish a ,German' society in order to gather German-speaking historians together in our special disciplines so that they form the core of an international society...«. Yet Sudhoff, at this time of burgeoning academic internationalism, was »quite willing« to accommodate the wishes of a number of founding members and »drop the word German in the title of the Society and have it merge with an international society«. The founding and naming of the Society at that time derived from a specific set of historical circumstances, and the same was true some 80 years later when in 1991, in the wake of German reunification, the »Deutsche Gesellschaft für Geschichte und Theorie der Biologie« was founded. From the start, the Society has been committed to bringing studies in the history and philosophy of biology to a wide audience, using for this purpose its Jahrbuch für Geschichte und Theorie der Biologie. Parallel to the Jahrbuch, the Verhandlungen zur Geschichte und Theorie der Biologie has become the by now traditional medium for the publication of papers delivered at the Society's annual meetings. In 2005 the Jahrbuch was renamed Annals of the History and Philosophy of Biology, reflecting the Society's internationalist aspirations in addressing comparative biology as a subject of historical and philosophical studies.
    Keywords: Biology ; Historical studies ; Philosophical studies ; Maggi ; Pavia ; bic Book Industry Communication::H Humanities::HP Philosophy::HPC History of Western philosophy ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences ; bic Book Industry Communication::W Lifestyle, sport & leisure::WN Natural history ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDH Philosophical traditions and schools of thought ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences ; thema EDItEUR::W Lifestyle, Hobbies and Leisure::WN Nature and the natural world: general interest
    Language: German
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  • 16
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    Education and Ethics in the Life Sciences: Strengthening the Prohibition of Biological Weapons (2021)
    ANU Press
    Details
    Publication Date: 2022-04-28
    Description: At the start of the twenty-first century, warnings have been raised in some quarters about how – by intent or by mishap – advances in biotechnology and related fields could aid the spread of disease. Science academics, medical organisations, governments, security analysts, and others are among those that have sought to raise concern. Education and Ethics in the Life Sciences examines a variety of attempts to bring greater awareness to security concerns associated with the life sciences. It identifies lessons from practical initiatives across a wide range of national contexts as well as more general reflections about education and ethics. The eighteen contributors bring together perspectives from a diverse range of fields – including politics, virology, sociology, ethics, security studies, microbiology, and medicine – as well as their experiences in universities, think tanks and government. In offering their assessment about what must be done and by whom, each chapter addresses a host of challenging practical and conceptual questions. Education and Ethics in the Life Sciences will be of interest to those planning and undertaking training activities in other areas. In asking how education and ethics are being made to matter in an emerging area of social unease, it will also be of interest to those with more general concerns about professional conduct.
    Keywords: biotechnology ; prevention ; ethics ; education ; Bioethics ; Biological warfare ; Biological Weapons Convention ; Biology ; Biosecurity ; China ; Dual-use technology ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFM Ethical issues & debates::JFMG Ethical issues: scientific & technological developments ; bic Book Industry Communication::J Society & social sciences::JN Education
    Language: English
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  • 17
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    Chapter 13 The value of the imagined biological in policy and society (2021)
    Taylor & Francis | Routledge
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    Publication Date: 2024-04-07
    Description: Attending the World Economic Forum this past week, I was struck by two trends. The first was that brain research has emerged as a hot topic. Not only was brain science or brain health a new theme at the meeting, research on the brain emerged in discussions about next generation computing, global cooperation, and even models of economic development as well as being linked to mental health or mindfulness. In a meeting frequented largely by economists and business leaders, I was surprised by the number of non-scientists who have become enchanted by brain science. Clearly this is the era of the brain, with mental health now part of a much broader discussion.
    Keywords: policy ; society ; mental health ; Biology ; Epigenetics ; Genetics ; Genome ; Neuroscience ; Plastic ; Social policy ; thema EDItEUR::J Society and Social Sciences ; thema EDItEUR::M Medicine and Nursing
    Language: English
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  • 18
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    Visões da Luz (2021)
    Coimbra University Press
    Details
    Publication Date: 2022-01-31
    Description: This work brings together various contributions from experts in very diverse areas of knowledge, to discuss the theme ‘Light’ from various points of view. The subjects gathered in this work come from the areas of Physics, Philosophy, Transcendence, Chemistry, Optics, Literature, History of Sciences, History, Geography, International Relations, Biology, Psychology, Art, Cinema and Photography, Medicine and Museology. The texts partially reflect the contents presented at the interdisciplinary colloquium ‘Visões da Luz’ held in October 2015, on the occasion of the International Year of Light 2015, under the aegis of III-UC and open to academia and society, to teachers of the Basic and Secondary Education.
    Keywords: Geography ; Chemistry ; Literature ; Geology ; Light ; Optics ; Biology ; History ; Physics
    Language: Portuguese
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  • 19
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    The Making of Modern Psychiatry (2021)
    Logos Verlag Berlin | Logos Verlag Berlin
    Details
    Publication Date: 2024-04-05
    Description: The field of psychiatry changed dramatically in the latter half of the nineteenth century, largely by embracing science. The transformation was most evident in Germany, where many psychiatrists began to work concurrently in the clinic and the laboratory. Some researchers sought to discover brain correlates of mental illness, while others looked to experimental psychology for insights into mental dynamics. Featured here, are the lives and works of Emil Kraepelin - often considered the founder of modern scientific psychiatry, his teacher Bernhard Gudden, and his anatomist colleague Franz Nissl. The book describes scientific findings together with the methods used; it explains why diagnoses were then (and are still now) so difficult to make; it also explores mind-brain controversies. The Making of Modern Psychiatry will inform and delight mental health professionals as well as all persons curious about the origins of modern psychiatry.
    Keywords: Science ; Life Sciences ; Biology ; Psychology ; Technology & Engineering ; Agriculture ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences ; thema EDItEUR::J Society and Social Sciences::JM Psychology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TV Agriculture and farming
    Language: English
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  • 20
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    Biohacking, Bodies and Do-It-Yourself (2021)
    transcript Verlag | transcript Verlag
    Details
    Publication Date: 2024-03-27
    Description: From self-help books and nootropics, to self-tracking and home health tests, to the tinkering with technology and biological particles - biohacking brings biology, medicine, and the material foundation of life into the sphere of »do-it-yourself«. This trend has the potential to fundamentally change people's relationship with their bodies and biology but it also creates new cultural narratives of responsibility, authority, and differentiation. Covering a broad range of examples, this book explores practices and representations of biohacking in popular culture, discussing their ambiguous position between empowerment and requirement, promise and prescription.
    Keywords: Culture ; Representation ; Biology ; Medicine ; Biocultures ; Biohacking ; Biotechnology ; Cultural Narratives ; DIY ; America ; Body ; Biopolitics ; American Studies ; Life Sciences ; Cultural Studies ; thema EDItEUR::D Biography, Literature and Literary studies::DS Literature: history and criticism::DSB Literary studies: general ; thema EDItEUR::J Society and Social Sciences::JP Politics and government::JPA Political science and theory ; thema EDItEUR::M Medicine and Nursing::MB Medicine: general issues
    Language: English
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  • 21
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    Biologie, abondance et cartographie de deux espèces de bivalves : l’huitre perlière 〈Pinctada radiata〉 et la coque glauque 〈Cerastoderma glaucum〉 dans le golfe de Gabes (2014)
    Details
    Publication Date: 2021-05-19
    Description: The pearl oyster Pinctada radiata and the cockle Cerastoderma glaucum are among the most abundant bivalve molluscs in southern Tunisian waters. These species are not currently subject to any investigation despite their important economic value in the world. For this reason, their biological parameters, their spatial distribution and their stock assessment were undertaken in the Gulf of Gabes. The reproductive cycle was studied in relation to variations of the environment parameters. The specimens were collected monthly during one year (2007) in sites of El Kraten and El Jorf (Kerkennah Islands) for the first species and sites of Sidi Mansour and El Hicha (North of Sfax and Gabes) for the second. An intraspecific polymorphism biometric trait for P. radiata and C. glaucum was performed using statistical comparison methods and multivariate analysis methods. Results of analyzes showed heterogeneity between populations. For Pinctada radiata, the sex ratio unbalanced, although males dominated among smaller individuals and females were predominant in larger size-classes. Evidence of protrandric hermaphroditism was observed with males maturing earlier than females. Seasonal changes in macroand microscopic properties of the gonads of both sexes showed that this species displayed a clearly defined annual reproductive cycle with a major peak in summer and a minor peak in autumn. The onset of reproduction appears to be triggered by the rising seawater temperature during spring and summer. P. radiata exhibited a short resting phase that occurred simultaneously in both sexes from the end of December until early February. For Cerastoderma glaucum, the overall samples presented a balanced sex ratio, with males dominating among smaller individuals and females predominating in larger size classes. The seasonal changes assessed through macro- and microscopic properties in the gonads of both sexes indicated a clearly defined annual reproductive cycle. Reproductive activity of C. glaucum was greatest from spring to late autumn, with two reproductive peaks (May and November). Gametogenic activity in both sexes was apparently triggered by the rising seawater temperature during spring and summer. These results support previous findings of latitudinal changes in the reproductive behaviour of C. glaucum. Due to the extensive period of gonadal activity, C. glaucum exhibited a short resting phase that occurred simultaneously in both sexes throughout January and February. In terms of stock assessment and spatial distribution of P. radiata, results showed a scattered distribution pattern of the species according to location and depth ranging between 0 and 145 ind.m-². P. radiata was encountered from the intertidal zone to 40 m depth, with a highest population densities recorded at depth range of 2-20 m. The total stock was estimated to be 27584.9 ± 11504.5 million individuals. Oyster distribution seems influenced by the substrate type. This high population of pearl oysters was associated with large cover of seagrass Posidonia oceanica which provides an excellent substratum for attachment. The littoral zone seems not to be the preferred habitat for the proliferation of this immigrant species. Oysters’ size increased steadily with depth, ranging from a mean of 37.98 ± 0.40 mm SH at 0-1 m to 60.98 ± 0.68 mm SH at 20-100 m depth range. Size structure analysis showed that deep water population was dominated by large individuals reaching 96 mm SH. In terms of geographical occupation and stock assessment of C. glaucum, results showed a scattered distribution pattern of the species according to location. The consequence was a remarkable biomass which represented 4736 tons of total fresh weight and high abundance levels reaching over 1982 million individuals estimated in the area of 20122 hectares. In conclusion, this study is the first report of an extraordinary abundance of Pinctada radiata and Cerastoderma glaucum in southern Tunisian waters. It gives more information about their stocks in the colonization area. The data may help to determine future quantitative changes indicating trends in the study area that are exposed to various factors of environmental conditions and human activities.
    Description: Submitted
    Description: ABONDANCE
    Description: BILOGIE
    Description: Pinctada radiata
    Description: Cerastoderma glaucum
    Description: Huitre perlière
    Keywords: Abundance ; Biology ; Shellfish
    Repository Name: AquaDocs
    Type: Theses and Dissertations , Phd thesis
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  • 22
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    Caracterização e distribuição do fitoplâncton na zona norte da costa angolana em Agosto de 2002. (2014)
    Universidade Agostino Neto, Luanda
    Details
    Publication Date: 2021-05-19
    Description: Instittuto Nacional de Investigaçao Pesqueira, INIP, luanda , Angola
    Description: Bachelors
    Description: Trabaho de fin cdoursado para obtençâo do grau de licenciatura em Biologica
    Description: Published
    Description: biologia marinha, fitoplâncton, limnologia, algas
    Description: marine biology, phytoplankton, algae,
    Keywords: Phytoplankton ; Nannoplankton ; Biology ; Limnology ; Algae
    Repository Name: AquaDocs
    Type: Theses and Dissertations , Bachelor thesis
    Format: 56
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  • 23
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    Hierarchical stripe phases in IrTe_{2} driven by competition between Ir dimerization and Te bonding (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-12
    Description: Author(s): Jixia Dai, Kristjan Haule, J. J. Yang, Y. S. Oh, S-W. Cheong, and Weida Wu Layered 5d transition metal dichalcogenide (TMD) IrTe 2 is distinguished from the traditional TMDs (such as NbSe 2 ) by the existence of multiple charge-density wave (CDW)-like stripe phases and superconductivity at low temperatures. Despite intensive studies, there is still no consensus on the physica... [Phys. Rev. B 90, 235121] Published Thu Dec 11, 2014
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
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  • 24
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    Self-organized electronic superlattices in layered materials (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-16
    Description: Author(s): Carmine Ortix, Carlo Di Castro, and José Lorenzana We show that in layered systems with electronic phase separation tendency, the long-range Coulomb interaction can drive the spontaneous formation of unidirectional superlattices of electronic charge in a completely homogeneous crystalline background. In this self-organized electronic heterostructure... [Phys. Rev. B 90, 241110] Published Mon Dec 15, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 25
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    Resonating valence-bond physics on the honeycomb lattice (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-16
    Description: Author(s): Pranay Patil, Ishita Dasgupta, and Kedar Damle We study bond and spin correlations of the nearest-neighbor resonating valence bond (RVB) wave function for a SU(2) symmetric S=1/2 antiferromagnet on the honeycomb lattice. We find that spin correlations in this wave function are short ranged, while the bond energy correlation function takes on an ... [Phys. Rev. B 90, 245121] Published Mon Dec 15, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 26
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    Real-time dynamics in the one-dimensional Hubbard model (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-17
    Description: Author(s): Luis Seabra, Fabian H. L. Essler, Frank Pollmann, Imke Schneider, and Thomas Veness We consider single-particle properties in the one-dimensional repulsive Hubbard model at commensurate fillings in the metallic phase. We determine the real-time evolution of the retarded Green's function by matrix-product state methods. We find that at sufficiently late times the numerical results a... [Phys. Rev. B 90, 245127] Published Tue Dec 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 27
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    Variational description of the ground state of the repulsive two-dimensional Hubbard model in terms of nonorthogonal symmetry-projected Slater determinants (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-08
    Description: Author(s): R. Rodríguez-Guzmán, Carlos A. Jiménez-Hoyos, and Gustavo E. Scuseria The few-determinant (FED) methodology, introduced in our previous works [R. Rodríguez-Guzmán et al. , Phys. Rev. B 87 , 235129 (2013);PRBMDO10.1103/PhysRevB.87.235129 Phys. Rev. B 89 , 195109 (2014)PRBMDO10.1103/PhysRevB.89.195109] for one-dimensional (1D) lattices, is here adapted for the repulsive tw... [Phys. Rev. B 90, 195110] Published Fri Nov 07, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 28
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    Memory effect in a ferroelectric single-electron transistor: Violation of conductance periodicity in the gate voltage (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-08
    Description: Author(s): S. A. Fedorov, A. E. Korolkov, N. M. Chtchelkatchev, O. G. Udalov, and I. S. Beloborodov A fundamental property of most single-electron devices with a quasicontinuous quasiparticle spectrum on an island is the periodicity of their transport characteristics in a gate voltage. This property is robust even with respect to placing ferroelectric insulators in the source and drain tunnel junc... [Phys. Rev. B 90, 195111] Published Fri Nov 07, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 29
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    Beyond Planck-Einstein quanta: Amplitude-driven quantum excitation (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-05
    Description: Author(s): Wen Shen, T. P. Devereaux, and J. K. Freericks Linear-response quantum excitation is proportional to the amplitude of the field, with the energy of the excitation given by the driving frequency. As the amplitude is increased, there is a crossover, where the excitation energy is governed by the amplitude of the driving field, not its frequency. A... [Phys. Rev. B 90, 195104] Published Tue Nov 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 30
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    Nontrivial Z2 topology in bismuth-based III-V compounds (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-05
    Description: Author(s): Huaqing Huang, Jianpeng Liu, and Wenhui Duan Realizing topological insulators in commonly used III-V semiconductors is of great importance for their potential application in spintronics and quantum computing. Here we propose a general strategy to realize topological insulators in conventional III-V semiconductors by bismuth substitution and ex... [Phys. Rev. B 90, 195105] Published Tue Nov 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 31
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    NMR studies of ordered structures and valence states in the successive valence-transition system EuPtP (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-05
    Description: Author(s): T. Mito, K. Nishitani, T. Koyama, H. Muta, T. Maruyama, G. Pristáš, K. Ueda, T. Kohara, A. Mitsuda, M. Sugishima, and H. Wada We have studied EuPtP, which undergoes two successive valence transitions at TA∼240 K and TB∼200 K by P31-nuclear magnetic resonance (NMR) measurements. From the analysis of NMR spectra, we obtained plausible ordered structures and Eu valence states in three phases divided by TA and TB. These ordere... [Phys. Rev. B 90, 195106] Published Tue Nov 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 32
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    Spin-orbit coupling and electronic charge effects in Mott insulators (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-05
    Description: Author(s): Shan Zhu, You-Quan Li, and Cristian D. Batista We derive the effective charge- and current-density operators for the strong-coupling limit of a single-band Mott insulator in the presence of spin-orbit coupling and show that the spin-orbit contribution to the effective charge density leads to novel mechanisms for multiferroic behavior. In some se... [Phys. Rev. B 90, 195107] Published Tue Nov 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 33
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    Commensurate and incommensurate states of topological quantum matter (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-04
    Description: Author(s): Ashley Milsted, Emilio Cobanera, Michele Burrello, and Gerardo Ortiz We prove numerically and by dualities the existence of modulated, commensurate and incommensurate states of topological quantum matter in systems of parafermions, motivated by recent proposals for the realization of such systems in mesoscopic arrays. In two space dimensions, we obtain the simplest r... [Phys. Rev. B 90, 195101] Published Mon Nov 03, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 34
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    Structural versus electronic distortions in IrTe2 with broken symmetry (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-06
    Description: Author(s): Hyo Sung Kim, Tae-Hwan Kim, Junjie Yang, Sang-Wook Cheong, and Han Woong Yeom We investigate atomic and electronic structures of the intriguing low-temperature phase of IrTe2 using high-resolution scanning tunneling microscopy and spectroscopy. We confirm various stripe superstructures such as ×3, ×5, and ×8. The strong vertical and lateral distortions of the lattice for the ... [Phys. Rev. B 90, 201103] Published Wed Nov 05, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 35
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    Block Lanczos density-matrix renormalization group method for general Anderson impurity models: Application to magnetic impurity problems in graphene (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-06
    Description: Author(s): Tomonori Shirakawa and Seiji Yunoki We introduce a block Lanczos (BL) recursive technique to construct quasi-one-dimensional models, suitable for density-matrix renormalization group (DMRG) calculations, from single- as well as multiple-impurity Anderson models in any spatial dimensions. This new scheme, named BL-DMRG method, allows u... [Phys. Rev. B 90, 195109] Published Wed Nov 05, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 36
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    Semiclassical evidence of columnar order in the fully frustrated transverse-field Ising model on the square lattice (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-06
    Description: Author(s): Tommaso Coletta, Sergey E. Korshunov, and Frédéric Mila We investigate the zero-temperature phase diagram of the fully frustrated transverse-field Ising model on the square lattice both in the classical limit and in the presence of quantum fluctuations. At the classical level (the limit of infinite spin S), we find that upon decreasing the transverse fie... [Phys. Rev. B 90, 205109] Published Wed Nov 05, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 37
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    Floquet-Bloch analysis of refracting Huygens metasurfaces (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-17
    Description: Author(s): Ariel Epstein and George V. Eleftheriades We investigate the response of passive lossless Huygens metasurfaces (HMS), designed to implement a prescribed refraction, to arbitrary plane-wave excitations. Applying a rigorous Floquet-Bloch (FB) analysis of the cotangent electric and magnetic surface reactance modulations, we discover that the s... [Phys. Rev. B 90, 235127] Published Tue Dec 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 38
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    One-way absorption of terahertz waves in rod-type and multilayer structures containing polar dielectrics (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-17
    Description: Author(s): Andriy E. Serebryannikov, Shunji Nojima, and Ekmel Ozbay One-way absorption can be obtained at terahertz frequencies in low-profile rod-type and multilayer dielectric structures with broken spatial inversion symmetry, which contain either a rod layer or an ultrathin homogeneous layer made of a polar dielectric. Perfect absorption for one of the two opposi... [Phys. Rev. B 90, 235126] Published Tue Dec 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 39
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    Direct experimental evidence of multiferroicity in a nanocrystalline Zener polaron ordered manganite (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-17
    Description: Author(s): Vinay Kumar Shukla, Soumik Mukhopadhyay, Kalipada Das, A. Sarma, and I. Das We discuss the particle size driven tunability of the coexistence of ferromagnetism and ferroelectricity in Pr 0.67 Ca 0.33 MnO 3 (PCMO) with the help of x-ray diffraction, magnetization, impedance spectroscopy, and remanent polarization measurements. The remanent polarization measurements using the “pos... [Phys. Rev. B 90, 245126] Published Tue Dec 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 40
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    Laser-induced charge-disproportionated metallic state in LaCoO_{3} (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-18
    Description: Author(s): M. Izquierdo, M. Karolak, C. Trabant, K. Holldack, A. Föhlisch, K. Kummer, D. Prabhakaran, A. T. Boothroyd, M. Spiwek, A. Belozerov, A. Poteryaev, A. Lichtenstein, and S. L. Molodtsov Understanding the origin of the spin transition in LaCoO 3 is one of the long-standing aims in condensed matter physics. Aside from its fundamental interest, a detailed description of this crossover will have a direct impact on the interpretation of the semiconductor-to-metal transition (SMT) and the... [Phys. Rev. B 90, 235128] Published Wed Dec 17, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 41
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    Transport in a hybrid normal metal/topological superconductor Kondo model (2014)
    American Physical Society (APS)
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    Publication Date: 2014-11-06
    Description: Author(s): Razvan Chirla, I. V. Dinu, V. Moldoveanu, and Cătălin Paşcu Moca We investigate the equilibrium and nonequilibrium transport through a quantum dot in the Kondo regime, embedded between a normal metal and a topological superconductor supporting Majorana bound states at its end points. We find that the Kondo physics is significantly modified by the presence of the ... [Phys. Rev. B 90, 195108] Published Wed Nov 05, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 42
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    Anomalous entanglement in chaotic Dirac billiards (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-02
    Description: Author(s): J. G. G. S. Ramos, I. M. L. da Silva, and A. L. R. Barbosa We present analytical and numerical results that demonstrate the presence of anomalous entanglement behavior on the Dirac Billiards. We investigate the statistical distribution of the characteristic entangled measures, focusing on the mean, on the variance, and on the quantum interference terms. We ... [Phys. Rev. B 90, 245107] Published Mon Dec 01, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 43
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    Conformal field theories at nonzero temperature: Operator product expansions, Monte Carlo, and holography (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-02
    Description: Author(s): Emanuel Katz, Subir Sachdev, Erik S. Sørensen, and William Witczak-Krempa Strongly correlated quantum critical points with conformal symmetry in two spatial dimensions describe many phase transitions in condensed matter systems, as for example that from superfluid to insulator. Combining field theory methods, Monte Carlo simulations, and the holographic duality from string theory, the authors use an operator product expansion to derive non-perturbative results for these systems, including the leading terms in the frequency dependence of the nonzero temperature conductivity and sum rules obeyed by the conductivity. These methods and results are applicable to a wide class of conformal field theories for condensed matter systems. [Phys. Rev. B 90, 245109] Published Mon Dec 01, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 44
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    Determination of Fermi contour and spin polarization of ν=3/2 composite fermions via ballistic commensurability measurements (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-03
    Description: Author(s): D. Kamburov, M. A. Mueed, I. Jo, Yang Liu, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, and R. Winkler In the composite fermions (CF) framework, at filling factor ν = 3/2 each carrier pairs up with two flux quanta to form quasi particles. The flux attachment cancels the external field, leaving the CFs as if they are at zero field — they occupy a Fermi sea with a well-defined Fermi contour. To examine this contour and its anisotropy induced by in-plane magnetic field, the authors apply the method of periodic grating of Hall bar samples, previously used by them in studies of CF near the filling factor 1/2. It is found that CF spin polarization increases with increasing quantum well width and electron density, and that in-plane magnetic field induces a larger CF Fermi contour anisotropy near filling factor 3/2 than near 1/2. [Phys. Rev. B 90, 235108] Published Tue Dec 02, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Real-time simulation of large open quantum spin systems driven by dissipation (2014)
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    Publication Date: 2014-12-03
    Description: Author(s): D. Banerjee, F.-J. Jiang, M. Kon, and U.-J. Wiese We consider a large quantum system with spins 1/2 whose dynamics is driven entirely by measurements of the total spin of spin pairs. This gives rise to a dissipative coupling to the environment. When one averages over the measurement results, the corresponding real-time path integral does not suffer... [Phys. Rev. B 90, 241104] Published Tue Dec 02, 2014
    Keywords: Electronic structure and strongly correlated systems
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    CPT theorem and classification of topological insulators and superconductors (2014)
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    Publication Date: 2014-12-04
    Description: Author(s): Chang-Tse Hsieh, Takahiro Morimoto, and Shinsei Ryu We present a systematic topological classification of fermionic and bosonic topological phases protected by time-reversal, particle-hole, parity, and combination of these symmetries. We use two complementary approaches: one in terms of K-theory classification of gapped quadratic fermion theories wit... [Phys. Rev. B 90, 245111] Published Wed Dec 03, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Z_{3} symmetry-protected topological phases in the SU(3) AKLT model (2014)
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    Publication Date: 2014-12-05
    Description: Author(s): Takahiro Morimoto, Hiroshi Ueda, Tsutomu Momoi, and Akira Furusaki We study Z 3 symmetry-protected topological (SPT) phases in one-dimensional spin systems with Z 3 ×Z 3 symmetry. We construct ground-state wave functions of the matrix product form for nontrivial Z 3 phases and their parent Hamiltonian from a cocycle of the group cohomology H 2 (Z 3 ×Z 3 ,U(1)). The Hamiltonia... [Phys. Rev. B 90, 235111] Published Thu Dec 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Excitonic condensation of strongly correlated electrons: The case of Pr_{0.5}Ca_{0.5}CoO_{3} (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-05
    Description: Author(s): Jan Kuneš and Pavel Augustinský We use a combination of dynamical mean-field model calculations and LDA + U material specific calculations to investigate the low temperature phase transition in the compounds from the (Pr 1−y R y ) x Ca 1−x CoO 3 (R=Nd, Sm, Eu, Gd, Tb, Y) family (PCCO). The transition, marked by a sharp peak in the specific... [Phys. Rev. B 90, 235112] Published Thu Dec 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Possible triplet p+ip superconductivity in graphene at low filling (2014)
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    Publication Date: 2014-12-05
    Description: Author(s): Tianxing Ma, Fan Yang, Hong Yao, and Hai-Qing Lin We study the Hubbard model on the honeycomb lattice with nearest-neighbor hopping (t〉0) and next-nearest-neighbor hopping (t ′ 〈0). When t ′ 〈−t/6, the single-particle spectrum is featured by the continuously distributed Van Hove saddle points at the band bottom, where the density of states div... [Phys. Rev. B 90, 245114] Published Thu Dec 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 50
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    Comparative study of low-temperature x-ray diffraction experiments on R_{2}Ir_{2}O_{7} (R=Nd, Eu, and Pr) (2014)
    American Physical Society (APS)
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    Publication Date: 2014-12-05
    Description: Author(s): Hiroshi Takatsu, Kunihiko Watanabe, Kazuki Goto, and Hiroaki Kadowaki The cubic symmetry of pyrochlore iridium oxides R 2 Ir 2 O 7 (R=Nd, Eu, and Pr) has been investigated by high resolution x-ray diffraction experiments down to 4 K, in order to clarify the relationship between the metal-insulator transition (MIT) and the small structural phase transition suggested by Rama... [Phys. Rev. B 90, 235110] Published Thu Dec 04, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Pressure-induced valence change of YbNiGe3 investigated by resonant x-ray emission spectroscopy at the Yb L3 edge (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-11
    Description: Author(s): Hitoshi Sato, Hitoshi Yamaoka, Yuki Utsumi, Heisuke Nagata, Marcos A. Avila, Raquel A. Ribeiro, Kazunori Umeo, Toshiro Takabatake, Yumiko Zekko, Jun'ichiro Mizuki, Jung-Fu Lin, Nozomu Hiraoka, Hirofumi Ishii, Ku-Ding Tsuei, Hirofumi Namatame, and Masaki Taniguchi Pressure dependence of the Yb valence in YbNiGe3 has been investigated up to 15.6 GPa at 300 K and up to 7.7 GPa at 17 K by means of x-ray absorption spectroscopy in Lα1 partial fluorescence yield mode and resonant x-ray emission spectroscopy around the Yb L3 absorption edge. The Yb valence in YbNiG... [Phys. Rev. B 89, 045112] Published Fri Jan 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Low-energy properties of fractional helical Luttinger liquids (2014)
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    Publication Date: 2014-01-11
    Description: Author(s): Tobias Meng, Lars Fritz, Dirk Schuricht, and Daniel Loss We investigate the low-energy properties of (quasi) helical and fractional helical Luttinger liquids. In particular, we calculate the Drude peak of the optical conductivity, the density of states, as well as charge transport properties of the interacting system with and without attached Fermi liquid... [Phys. Rev. B 89, 045111] Published Fri Jan 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 53
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    Magnetophotonic intensity effects in hybrid metal-dielectric structures (2014)
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    Publication Date: 2014-01-15
    Description: Author(s): V. I. Belotelov, L. E. Kreilkamp, A. N. Kalish, I. A. Akimov, D. A. Bykov, S. Kasture, V. J. Yallapragada, Achanta Venu Gopal, A. M. Grishin, S. I. Khartsev, M. Nur-E-Alam, M. Vasiliev, L. L. Doskolovich, D. R. Yakovlev, K. Alameh, A. K. Zvezdin, and M. Bayer The magneto-optical properties of a hybrid metal-dielectric structure consisting of a one-dimensional gold grating on top of a magnetic waveguide layer are studied experimentally and theoretically. It is demonstrated that a magnetic field applied in the longitudinal configuration (in the plane of th... [Phys. Rev. B 89, 045118] Published Tue Jan 14, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 54
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    Spin-density-wave ordering in Ca0.5Sr1.5RuO4 studied by neutron scattering (2014)
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    Publication Date: 2014-01-15
    Description: Author(s): S. Kunkemöller, A. A. Nugroho, Y. Sidis, and M. Braden The spin-density-wave ordering in Ca0.5Sr1.5RuO4 was studied by polarized and unpolarized neutron diffraction experiments. Below about 20 K Ca0.5Sr1.5RuO4 exhibits quasistatic correlations at exactly the incommensurate wave vector at which pure Sr2RuO4 shows strong inelastic fluctuations driven by F... [Phys. Rev. B 89, 045119] Published Tue Jan 14, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Superconductivity in the two-dimensional t-t′-Hubbard model (2014)
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    Publication Date: 2014-01-18
    Description: Author(s): Andreas Eberlein and Walter Metzner Using a recently developed renormalization group method for fermionic superfluids, we determine conditions for d-wave superconductivity in the ground state of the two-dimensional Hubbard model at moderate interaction strength, and we compute the pairing gap in the superconducting regime. A pairing i... [Phys. Rev. B 89, 035126] Published Fri Jan 17, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Surface density of states of layered f-electron materials (2014)
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    Publication Date: 2014-01-18
    Description: Author(s): Robert Peters and Norio Kawakami We theoretically analyze the surface density of states of heavy fermion materials such as CeCoIn5. Recent experimental progress has made it possible to locally probe the formation of heavy quasiparticles in these systems via scanning tunneling microscopy, in which strongly temperature-dependent reso... [Phys. Rev. B 89, 041106] Published Fri Jan 17, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Hartree-Fock computation of the high-Tc cuprate phase diagram (2014)
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    Publication Date: 2014-01-23
    Description: Author(s): R. B. Laughlin A computation of the cuprate phase diagram is presented. Adiabatic deformability back to the density function band structure plus symmetry constraints lead to a Fermi liquid theory with five interaction parameters. Two of these are forced to zero by experiment. The remaining three are fit to the mom... [Phys. Rev. B 89, 035134] Published Wed Jan 22, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Exact zero modes and decoherence in systems of interacting Majorana fermions (2014)
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    Publication Date: 2014-01-23
    Description: Author(s): Guang Yang and D. E. Feldman Majorana fermions often coexist with other low-energy fermionic degrees of freedom. In such a situation, topological quantum computation requires the use of fermionic zero modes of a many-body system. We classify all such modes for interacting fermions and show how to select the mode that maximizes ... [Phys. Rev. B 89, 035136] Published Wed Jan 22, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Magnetic-field-induced transitions and evolution of magnetotransport properties in quasi-two-dimensional KMo6O17 in the charge-density-wave phase (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-24
    Description: Author(s): J.-F. Wang, M. Yang, L. Li, M. Sasaki, A. Ohnishi, M. Kitaura, K.-S. Kim, and Heon-Jung Kim Longitudinal magnetoresistivity ρxx(B) and Hall resistivity ρxy(B) of KMo6O17 single crystals have been measured up to 60 T in a pulse magnet. Remarkable and unusual features at characteristic magnetic fields were found in both ρxx(B) and ρxy(B), which were attributed to Fermi surface reconstruction... [Phys. Rev. B 89, 035137] Published Thu Jan 23, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Induced tunneling and localization for a quantum particle in tilted two-dimensional lattices (2014)
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    Publication Date: 2014-01-14
    Description: Author(s): Evgeny N. Bulgakov and Andrey R. Kolovsky We consider a quantum particle in tilted two-dimensional lattices in the tight-binding approximations. We show that for certain lattice geometries the particle can freely move across the lattice in the direction perpendicular to the vector of the static force. This effect is argued to be analog of t... [Phys. Rev. B 89, 035116] Published Mon Jan 13, 2014
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    Stability of surface states of weak Z2 topological insulators and superconductors (2014)
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    Publication Date: 2014-01-14
    Description: Author(s): Takahiro Morimoto and Akira Furusaki We study the stability against disorder of surface states of weak Z2 topological insulators (superconductors) which are stacks of strong Z2 topological insulators (superconductors), considering representative Dirac Hamiltonians in the Altland-Zirnbauer symmetry classes in various spatial dimensions.... [Phys. Rev. B 89, 035117] Published Mon Jan 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Physical bounds on absorption and scattering for cloaked sensors (2014)
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    Publication Date: 2014-01-16
    Description: Author(s): Romain Fleury, Jason Soric, and Andrea Alù We derive and discuss general physical bounds on the electromagnetic scattering and absorption of passive structures. Our theory, based on passivity and power conservation, quantifies the minimum and maximum allowed scattering for an object that absorbs a given level of power. We show that there is ... [Phys. Rev. B 89, 045122] Published Wed Jan 15, 2014
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    Magnetopolaron-induced optical response in transition metal oxides (2014)
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    Publication Date: 2014-01-16
    Description: Author(s): J. M. Caicedo, J. Fontcuberta, and G. Herranz We report on the optical response of different magnetic oxides (manganites, ruthenates, and magnetite) and show that for photons with energies ≈1.5−3.5 eV the intensity of light reflected by these epitaxial oxide thin films is strongly modulated by magnetic fields. We argue that this behavior is rel... [Phys. Rev. B 89, 045121] Published Wed Jan 15, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Ground-state uniqueness of the twelve-site RVB spin-liquid parent Hamiltonian on the kagome lattice (2014)
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    Publication Date: 2014-01-17
    Description: Author(s): Zhenyu Zhou, Julia Wildeboer, and Alexander Seidel Anderson's idea of a (short-ranged) resonating valence bond (RVB) spin liquid has been the first ever proposal of what we now call a topologically ordered phase. Since then, a wealth of exactly solvable lattice models have been constructed that have topologically ordered ground states. For a long ti... [Phys. Rev. B 89, 035123] Published Thu Jan 16, 2014
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    Anderson impurity in the bulk of topological insulators (2014)
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    Publication Date: 2014-01-18
    Description: Author(s): Igor Kuzmenko, Yshai Avishai, and Tai Kai Ng When an Anderson impurity is immersed in the bulk of a topological insulator that has an “inverted-Mexican-hat” band dispersion, a Kondo resonant peak appears simultaneously with an in-gap bound state. The latter generates another spin state thereby screening the Kondo effect. Using a weak-coupling ... [Phys. Rev. B 89, 035125] Published Fri Jan 17, 2014
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    Structure factor of interacting one-dimensional helical systems (2014)
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    Publication Date: 2014-01-22
    Description: Author(s): Suhas Gangadharaiah, Thomas L. Schmidt, and Daniel Loss We calculate the dynamical structure factor S(q,ω) of a weakly interacting helical edge state in the presence of a magnetic field B. The latter opens a gap of width 2B in the single-particle spectrum, which becomes strongly nonlinear near the Dirac point. For chemical potentials |μ|〉B, the system... [Phys. Rev. B 89, 035131] Published Tue Jan 21, 2014
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    Wigner-Mott insulator-to-insulator transition at pressure in charge-ordered Fe2OBO3 (2014)
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    Publication Date: 2014-01-22
    Description: Author(s): G. Diguet, G. R. Hearne, W. N. Sibanda, E. Carleschi, P. Musyimi, V. Pischedda, and J. P. Attfield Magnetic-electronic studies of mixed-valence Fe2OBO3 have shown that ionic charge order (CO) is disrupted at ∼16 GPa. The pertinent minority-spin carrier exhibits persistent intersite electron exchange Fe2+ ⇔ Fe3+ to well beyond this pressure. Temperature-dependent electrical transport measurements ... [Phys. Rev. B 89, 035132] Published Tue Jan 21, 2014
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    Existence of anisotropic spin fluctuations at low temperature in the normal phase of the superconducting ferromagnet UCoGe (2014)
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    Publication Date: 2014-01-22
    Description: Author(s): M. Taupin, L. Howald, D. Aoki, J. Flouquet, and J. P. Brison Thermal conductivity measurements have been performed on the superconducting ferromagnet UCoGe down to very low temperature and under magnetic field. In addition to the electronic quasiparticle thermal conductivity, additional contributions to the thermal transport are detected: they are sensitive t... [Phys. Rev. B 89, 041108] Published Tue Jan 21, 2014
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    Strong local lattice instability in hexagonal ferrites RFe2O4 (R = Lu,Y,Yb) revealed by x-ray absorption spectroscopy (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-23
    Description: Author(s): Sara Lafuerza, Joaquín García, Gloria Subías, Javier Blasco, and Vera Cuartero We present here an x-ray absorption study of the RFe2O4 series (LuFe2O4, YFe2O4, YbFe2O4, and LuCoFeO4) at the Fe K-edge. Extended x-ray absorption fine structure (EXAFS) and x-ray absorption near-edge structure (XANES) spectra were measured at temperatures ranging from 100 K to 390 K crossing the c... [Phys. Rev. B 89, 045129] Published Wed Jan 22, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Hybridized/coupled multiple resonances in nacre (2014)
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    Publication Date: 2014-01-11
    Description: Author(s): Seung Ho Choi and Young L. Kim We report that nacre (also known as mother-of-pearl), a wondrous nanocomposite found in nature, is a rich photonic nanomaterial allowing the experimental realization of collective excitation and light amplification via coupled states. Localized modes in three-dimensional complex media are typically ... [Phys. Rev. B 89, 035115] Published Fri Jan 10, 2014
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    NMR study of electronic correlations in Mn-doped Ba(Fe1−xCox)2As2 and BaFe2(As1−xPx)2 (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-11
    Description: Author(s): D. LeBoeuf, Y. Texier, M. Boselli, A. Forget, D. Colson, and J. Bobroff We probe the real-space electronic response to a local magnetic impurity in isovalent and heterovalent doped BaFe2As2 (122) using nuclear magnetic resonance (NMR). The local moments carried by Mn impurities doped into Ba(Fe1−xCox)2As2 (Co-122) and BaFe2(As1−xPx)2 (P-122) at optimal doping induce a s... [Phys. Rev. B 89, 035114] Published Fri Jan 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Lattice effects in the quasi-two-dimensional valence-bond-solid Mott insulator EtMe3P[Pd(dmit)2]2 (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-11
    Description: Author(s): Rudra Sekhar Manna, Mariano de Souza, Reizo Kato, and Michael Lang The organic charge-transfer salt EtMe3P[Pd(dmit)2]2 is a quasi-two-dimensional Mott insulator with localized spins S=1/2 residing on a distorted triangular lattice. Here we report measurements of the uniaxial thermal expansion coefficients αi along the in-plane i=a and c axis as well as along the ou... [Phys. Rev. B 89, 045113] Published Fri Jan 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Quantum Hall phases of two-component bosons (2014)
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    Publication Date: 2014-01-14
    Description: Author(s): T. Graß, D. Raventós, M. Lewenstein, and B. Juliá-Díaz The recent production of synthetic magnetic fields acting on electroneutral particles, such as atoms or photons, has boosted interest in the quantum Hall physics of bosons. Adding pseudospin 1/2 to the bosons greatly enriches the scenario, as it allows them to form an interacting integer quantum Hal... [Phys. Rev. B 89, 045114] Published Mon Jan 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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    Magnetic phase diagram of a five-orbital Hubbard model in the real-space Hartree-Fock approximation varying the electronic density (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-14
    Description: Author(s): Qinlong Luo and Elbio Dagotto Using the real-space Hartree-Fock approximation, the magnetic phase diagram of a five-orbital Hubbard model for the iron-based superconductors is studied varying the electronic density n in the range from five to seven electrons per transition metal atom. The Hubbard interaction U is also varied, at... [Phys. Rev. B 89, 045115] Published Mon Jan 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 75
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    Consistent treatment of charged systems within periodic boundary conditions: The projector augmented-wave and pseudopotential methods revisited (2014)
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    Publication Date: 2014-01-14
    Description: Author(s): Fabien Bruneval, Jean-Paul Crocombette, Xavier Gonze, Boris Dorado, Marc Torrent, and François Jollet The ab initio calculation of charged defect properties in solids is not straightforward because of the delicate interplay between the long-range Coulomb interaction and the periodic boundary conditions. We derive the projector augmented-wave (PAW) energy and Hamiltonian with special care taken on th... [Phys. Rev. B 89, 045116] Published Mon Jan 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 76
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    Diffractive stacks of metamaterial lattices with a complex unit cell: Self-consistent long-range bianisotropic interactions in experiment and theory (2014)
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    Publication Date: 2014-01-16
    Description: Author(s): Andrej Kwadrin and A. Femius Koenderink Metasurfaces and metamaterials promise arbitrary rerouting of light using two-dimensional (2D) planar arrangements of electric and magnetic scatterers, respectively, 3D stacks built out of such 2D planes. An important problem is how to self-consistently model the response of these systems in a manne... [Phys. Rev. B 89, 045120] Published Wed Jan 15, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 77
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    Single-polaron properties for double-well electron-phonon coupling (2014)
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    Publication Date: 2014-01-17
    Description: Author(s): Clemens P. J. Adolphs and Mona Berciu We show that in crystals where light ions are symmetrically intercalated between heavy ions, the electron-phonon coupling for carriers located at the light sites cannot be described by a Holstein model. We introduce the double-well electron-phonon coupling model to describe the most interesting para... [Phys. Rev. B 89, 035122] Published Thu Jan 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 78
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    Effective model for the electronic properties of quasi-one-dimensional purple bronze Li0.9Mo6O17 based on ab initio calculations (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-17
    Description: Author(s): Martin Nuss and Markus Aichhorn We investigate the electronic structure of the strongly anisotropic, quasi-low-dimensional purple bronze Li0.9Mo6O17. Building on all-electron ab initio band-structure calculations, we obtain an effective model in terms of four maximally localized Wannier orbitals, which turn out to be far from atom... [Phys. Rev. B 89, 045125] Published Thu Jan 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 79
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    Topological defects of Néel order and Kondo singlet formation for the Kondo-Heisenberg model on a honeycomb lattice (2014)
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    Publication Date: 2014-01-17
    Description: Author(s): Pallab Goswami and Qimiao Si Heavy-fermion systems represent a prototypical setting to study magnetic quantum phase transitions. A particular focus has been on the physics of Kondo destruction, which captures quantum criticality beyond the Landau framework of order-parameter fluctuations. In this context, we study the spin one-... [Phys. Rev. B 89, 045124] Published Thu Jan 16, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 80
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    Tunable all-angle negative refraction using antiferromagnets (2014)
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    Publication Date: 2014-01-23
    Description: Author(s): R. Macêdo and T. Dumelow We show how all-angle negative refraction can occur in a uniaxial antiferromagnet close to the magnon resonance frequency. This behavior is based on the fact that, in such cases, the antiferromagnet acts as an indefinite permeability medium, i.e., not all its permeability tensor components are of th... [Phys. Rev. B 89, 035135] Published Wed Jan 22, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 81
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    Wiedemann-Franz law and nonvanishing temperature scale across the field-tuned quantum critical point of YbRh2Si2 (2014)
    American Physical Society (APS)
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    Publication Date: 2014-01-24
    Description: Author(s): J.-Ph. Reid, M. A. Tanatar, R. Daou, Rongwei Hu, C. Petrovic, and Louis Taillefer The in-plane thermal conductivity κ and electrical resistivity ρ of the heavy-fermion metal YbRh2Si2 were measured down to 50 mK for magnetic fields H parallel and perpendicular to the tetragonal c axis, through the field-tuned quantum critical point Hc, at which antiferromagnetic order ends. The th... [Phys. Rev. B 89, 045130] Published Thu Jan 23, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 82
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    Correlation matrix renormalization approximation for total-energy calculations of correlated electron systems (2014)
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    Publication Date: 2014-01-24
    Description: Author(s): Y. X. Yao, J. Liu, C. Z. Wang, and K. M. Ho We generalized the commonly used Gutzwiller approximation for calculating the electronic structure and total energy of strongly correlated electron systems. In our method, the evaluation of one-body and two-body density matrix elements of the Hamiltonian is simplified using a renormalization approxi... [Phys. Rev. B 89, 045131] Published Thu Jan 23, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 83
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    Emergence of nonequilibrium charge dynamics in a charge-cluster glass (2014)
    American Physical Society (APS)
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    Publication Date: 2014-03-11
    Description: Author(s): T. Sato, F. Kagawa, K. Kobayashi, K. Miyagawa, K. Kanoda, R. Kumai, Y. Murakami, and Y. Tokura Nonequilibrium charge dynamics, such as cooling-rate-dependent charge vitrification and physical aging, have been demonstrated for a charge-cluster glass in θ-(BEDT-TTF)2CsZn(SCN)4 using electron transport measurements. The temperature evolution of the relaxation time obeys the Arrhenius law, indica... [Phys. Rev. B 89, 121102] Published Mon Mar 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 84
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    van der Waals density functional made accurate (2014)
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    Publication Date: 2014-03-11
    Description: Author(s): Ikutaro Hamada I propose a van der Waals density functional (vdW-DF) that improves upon the description of energetics and geometries of molecules, solids, and adsorption systems over the original vdW-DF. The functional is based on the nonlocal correlation for the second version of the vdW-DF [Lee et al., Phys. Re... [Phys. Rev. B 89, 121103] Published Mon Mar 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 85
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    Broadband chiral metamaterials with large optical activity (2014)
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    Publication Date: 2014-03-11
    Description: Author(s): Kirsty Hannam, David A. Powell, Ilya V. Shadrivov, and Yuri S. Kivshar We study theoretically and experimentally a type of metamaterial with hybrid elements composed of twisted pairs of cross-shaped meta-atoms and their complements. We reveal that such two-layer metasurfaces demonstrate large, dispersionless optical activity at the transmission resonance accompanied by... [Phys. Rev. B 89, 125105] Published Mon Mar 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 86
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    Nonequilibrium noise in transport across a tunneling contact between ν=23 fractional quantum Hall edges (2014)
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    Publication Date: 2014-03-11
    Description: Author(s): O. Shtanko, K. Snizhko, and V. Cheianov In a recent experimental paper [Bid et al., Nature 466, 585 (2010)] a qualitative confirmation of the existence of upstream neutral modes at the ν=23 quantum Hall edge was reported. Using the chiral Luttinger liquid theory of the quantum Hall edge we develop a quantitative model of the experiment o... [Phys. Rev. B 89, 125104] Published Mon Mar 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 87
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    Evolution of the optical properties of chromium spinels CdCr2O4, HgCr2S4, and ZnCr2Se4 under high pressure (2014)
    American Physical Society (APS)
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    Publication Date: 2014-03-11
    Description: Author(s): K. Rabia, L. Baldassarre, J. Deisenhofer, V. Tsurkan, and C. A. Kuntscher We report pressure-dependent reflection and transmission measurements on ZnCr2Se4, HgCr2S4, and CdCr2O4 single crystals at room temperature over a broad spectral range 200–24 000 cm−1. The pressure dependence of the phonon modes and the high-frequency electronic excitations indicate that all three c... [Phys. Rev. B 89, 125107] Published Mon Mar 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 88
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    Wigner localization in quantum dots from Kohn-Sham density functional theory without symmetry breaking (2014)
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    Publication Date: 2014-03-11
    Description: Author(s): Christian B. Mendl, Francesc Malet, and Paola Gori-Giorgi We address low-density two-dimensional circular quantum dots with spin-restricted Kohn-Sham density functional theory. By using an exchange-correlation functional that encodes the effects of the strongly correlated regime (and that becomes exact in the limit of infinite correlation), we are able to ... [Phys. Rev. B 89, 125106] Published Mon Mar 10, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 89
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    Solution to sign problems in half-filled spin-polarized electronic systems (2014)
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    Publication Date: 2014-03-13
    Description: Author(s): Emilie Fulton Huffman and Shailesh Chandrasekharan We solve the sign problem in a particle-hole symmetric spin-polarized fermion model on bipartite lattices using the idea of fermion bags. The solution can be extended to a class of models at half filling but without particle-hole symmetry. Attractive Hubbard models with an odd number of fermion spec... [Phys. Rev. B 89, 111101] Published Wed Mar 12, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 90
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    Generalized Wilson chain for solving multichannel quantum impurity problems (2014)
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    Publication Date: 2014-03-13
    Description: Author(s): Andrew K. Mitchell, Martin R. Galpin, Samuel Wilson-Fletcher, David E. Logan, and Ralf Bulla The numerical renormalization group is used to solve quantum impurity problems, which describe magnetic impurities in metals, nanodevices, and correlated materials within dynamical mean field theory. Here we present a simple generalization of the Wilson chain, which improves the scaling of computati... [Phys. Rev. B 89, 121105] Published Wed Mar 12, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 91
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    Correlation between the valence state of cerium and the magnetic transition in Ce(Ru1−xFex)2Al10 studied by resonant x-ray emission spectroscopy (2014)
    American Physical Society (APS)
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    Publication Date: 2014-03-13
    Description: Author(s): Yumiko Zekko, Yoshiya Yamamoto, Hitoshi Yamaoka, Fumisato Tajima, Takashi Nishioka, Fabio Strigari, Andrea Severing, Jun-Fu Lin, Nozomu Hiraoka, Hirofumi Ishii, Ku-Ding Tsuei, and Jun'ichiro Mizuki The correlation between the 4f-conduction electron (c-f) hybridization and the transition temperature T0 into the unconventional antiferromagnetically (AFM) ordered state in Ce(Ru1−xFex)2Al10 has been investigated. The impact of pressure on the crystal structure and the electronic structure has been... [Phys. Rev. B 89, 125108] Published Wed Mar 12, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 92
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    Temperature-dependent orbital physics in a spin-orbital-lattice-coupled 2p electron Mott system: The case of KO2 (2014)
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    Publication Date: 2014-03-14
    Description: Author(s): Minjae Kim and B. I. Min We have investigated the temperature (T)-dependent evolution of orbital states in a typical spin-orbital-lattice-coupled 2p electron Mott system KO2, based on the electronic structures obtained by the dynamical mean-field theory as well as the density functional theory. We have shown that KO2 exhibi... [Phys. Rev. B 89, 121106] Published Thu Mar 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 93
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    Photoinduced changes in the cuprate electronic structure revealed by femtosecond time- and angle-resolved photoemission (2014)
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    Publication Date: 2014-03-14
    Description: Author(s): J. D. Rameau, S. Freutel, L. Rettig, I. Avigo, M. Ligges, Y. Yoshida, H. Eisaki, J. Schneeloch, R. D. Zhong, Z. J. Xu, G. D. Gu, P. D. Johnson, and U. Bovensiepen The dressing of quasiparticles in solids is investigated by changes in the electronic structure E(k) driven by femtosecond laser pulses. Employing time- and angle-resolved photoemission on an optimally doped cuprate above Tc, we observe two effects with different characteristic temporal evolutions a... [Phys. Rev. B 89, 115115] Published Thu Mar 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 94
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    Effects of d-band shape on the surface reactivity of transition-metal alloys (2014)
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    Publication Date: 2014-03-14
    Description: Author(s): Hongliang Xin, Aleksandra Vojvodic, Johannes Voss, Jens K. Nørskov, and Frank Abild-Pedersen The d-band shape of a metal site, governed by the local geometry and composition of materials, plays an important role in determining trends of the surface reactivity of transition-metal alloys. We discuss this phenomenon using the chemisorption of various adsorbates such as C, N, O, and their hydro... [Phys. Rev. B 89, 115114] Published Thu Mar 13, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 95
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    Blind deconvolution of density-matrix renormalization-group spectra (2014)
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    Publication Date: 2014-05-02
    Description: Author(s): M. Paech and E. Jeckelmann We present a numerical method for calculating piecewise smooth spectral functions of correlated quantum systems in the thermodynamic limit from the spectra of finite systems computed using the dynamical or correction-vector density-matrix renormalization group method. The key idea is to consider thi... [Phys. Rev. B 89, 195101] Published Thu May 01, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 96
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    Effects of Cu2+ doping and pressure on the exchange-mediated exciton dynamics in one-dimensional N(CH3)4MnCl3 (2014)
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    Publication Date: 2014-03-21
    Description: Author(s): Lucie Nataf, José Antonio Barreda-Argüeso, Rafael Valiente, Jesús González, and Fernando Rodríguez This work investigates the Mn2+ electronic structure and exciton dynamics in one-dimensional (1D) N(CH3)4MnCl3 (TMMC) through time-resolved excitation/emission spectroscopy and absorption measurements in the 0–10 GPa pressure range for different Cu2+ doping concentrations. The local and crystal stru... [Phys. Rev. B 89, 115120] Published Thu Mar 20, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 97
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    Confinement-driven transitions between topological and Mott phases in (LaNiO3)N/(LaAlO3)M(111) superlattices (2014)
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    Publication Date: 2014-03-21
    Description: Author(s): David Doennig, Warren E. Pickett, and Rossitza Pentcheva A set of broken-symmetry two-dimensional ground states is predicted in (111)-oriented (LaNiO3)N/(LaAlO3)M (N/M) superlattices, based on density functional theory calculations including a Hubbard U term. An unanticipated Jahn-Teller distortion with dz2 orbital polarization and a ferromagnetic Mott-in... [Phys. Rev. B 89, 121110] Published Thu Mar 20, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 98
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    Possible undercompensation effect in the Kondo insulator (Yb,Tm)B12 (2014)
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    Publication Date: 2014-03-21
    Description: Author(s): P. A. Alekseev, K. S. Nemkovski, J.-M. Mignot, E. S. Clementyev, A. S. Ivanov, S. Rols, R. I. Bewley, V. B. Filipov, and N. Yu. Shitsevalova The effects of Tm substitution on the dynamical magnetic response of Yb1−xTmxB12 (x=0, 0.08, 0.15, and 0.75) and Lu0.92Tm0.08B12 compounds have been studied using time-of-flight inelastic neutron scattering. Major changes were observed in the spectral structure and temperature evolution of the Yb co... [Phys. Rev. B 89, 115121] Published Thu Mar 20, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 99
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    Microscopic evidence for strong periodic lattice distortion in two-dimensional charge-density wave systems (2014)
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    Publication Date: 2014-05-01
    Description: Author(s): Jixia Dai, Eduardo Calleja, Jacob Alldredge, Xiangde Zhu, Lijun Li, Wenjian Lu, Yuping Sun, Thomas Wolf, Helmuth Berger, and Kyle McElroy In quasi-two-dimensional electron systems of layered transition metal dichalcogenides (TMDs) there is still controversy about the nature of the transitions to charge-density wave (CDW) phases, i.e., whether they are described by a Peierls-type mechanism or by a lattice-driven model. By performing sc... [Phys. Rev. B 89, 165140] Published Wed Apr 30, 2014
    Keywords: Electronic structure and strongly correlated systems
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  • 100
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    Effect of As-chain layers in CaFeAs2 (2014)
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    Publication Date: 2014-05-06
    Description: Author(s): Xianxin Wu, Congcong Le, Yi Liang, Shengshan Qin, Heng Fan, and Jiangping Hu The recently discovered iron-based superconductors have chainlike As layers. These layers generate an additional three-dimensional hole pocket and conelike electron pockets. The former is attributed to the Ca d and As1 pz orbitals and the latter are attributed to the anisotropic Dirac cone, contribu... [Phys. Rev. B 89, 205102] Published Mon May 05, 2014
    Keywords: Electronic structure and strongly correlated systems
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