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Sur l'eau normale méditerraneenne: 1ère partie: Historique, discussion des méthodes, propositions (2016)

Freundler, M. P. ; Pilaud, M.

Station Océanographique de Salammbô | Paris, France

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Publikationsdatum: 2021-05-19

Beschreibung: La détermination de la chloruration des eaux de mer est effectuée depuis de nombreuses années par la méthode volémetrisque de Moher.

Beschreibung: Published

Schlagwort(e): Volumetric analysis ; Sea water ; Chemistry ; Density ; Water density ; Chlorination ; Methodology ; Marine

Repository-Name: AquaDocs

Materialart: Book/Monograph/Conference Proceedings , Refereed

Format: 28pp.

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Topological magnetic dipolar interaction and nonlocal electric magnetization control in topological insulator heterostructures (2016)

Stefan Rex, Flavio S. Nogueira, and Asle Sudbø

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-09

Beschreibung: Author(s): Stefan Rex, Flavio S. Nogueira, and Asle Sudbø The magnetoelectric effect predicted in topological insulators makes heterostructures that combine magnetic materials and such insulators promising candidates for spintronics applications. Here, we theoretically consider a setup that exhibits two well-separated interfaces between a topological insul… [Phys. Rev. B 94, 020404(R)] Published Thu Jul 07, 2016

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

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Thema: Physik

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Classification of magnons in rotated ferromagnetic Heisenberg model and their competing responses in transverse fields (2016)

Fadi Sun, Jinwu Ye, and Wu-Ming Liu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-09

Beschreibung: Author(s): Fadi Sun, Jinwu Ye, and Wu-Ming Liu In this paper, we study the rotated ferromagnetic Heisenberg model (RFHM) in two different transverse fields, h x and h z , which can be intuitively visualized as studying spin-orbit coupling (SOC) effects in two-dimensional (2D) Ising or anisotropic X Y model in a transverse field. At a special SOC cla… [Phys. Rev. B 94, 024409] Published Thu Jul 07, 2016

Schlagwort(e): Magnetism

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Thema: Physik

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Multiscale modeling of polycrystalline graphene: A comparison of structure and defect energies of realistic samples from phase field crystal models (2016)

Petri Hirvonen, Mikko M. Ervasti, Zheyong Fan, Morteza Jalalvand, Matthew Seymour, S. Mehdi Vaez Allaei, Nikolas Provatas, Ari Harju, Ken R. Elder, and Tapio Ala-Nissila

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): Petri Hirvonen, Mikko M. Ervasti, Zheyong Fan, Morteza Jalalvand, Matthew Seymour, S. Mehdi Vaez Allaei, Nikolas Provatas, Ari Harju, Ken R. Elder, and Tapio Ala-Nissila We extend the phase field crystal (PFC) framework to quantitative modeling of polycrystalline graphene. PFC modeling is a powerful multiscale method for finding the ground state configurations of large realistic samples that can be further used to study their mechanical, thermal, or electronic prope… [Phys. Rev. B 94, 035414] Published Mon Jul 11, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Electron diffraction by plasmon waves (2016)

F. J. García de Abajo, B. Barwick, and F. Carbone

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): F. J. García de Abajo, B. Barwick, and F. Carbone The properties of an electron beam can be manipulated by electromagnetic fields in vacuum via the ponderomotive force. Such an interaction is also at the core of the Kapitza-Dirac effect, which describes the diffraction of electrons by an optical standing wave. Here, the authors predict a new type of interaction between electrons and the electromagnetic field, opening up new possibilities for the manipulation of electron beams. If surface plasmon polaritons are tailored to interfere forming a periodic field pattern, it becomes possible to diffract electrons from such near field. With the proper manipulation of the plasmonic fields, orbital angular momentum can be imparted to the electrons, and even the phase of their wave functions can be manipulated. An additional degree of freedom is provided by the possibility to tailor the spatial properties of the light and the materials supporting the surface plasmons. This arbitrary control can be extended to different substrates such as graphene or layered systems and may open up a viable route to create tunable phase plates for electron microscopes. [Phys. Rev. B 94, 041404(R)] Published Mon Jul 11, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Inverted pendulum state of a polariton Rabi oscillator (2016)

N. S. Voronova, A. A. Elistratov, and Yu. E. Lozovik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): N. S. Voronova, A. A. Elistratov, and Yu. E. Lozovik Exciton-photon beats known as polariton Rabi oscillations in semiconductor microcavities are usually excited by short pulses of light. We consider a different pumping scheme, assuming a cw pumping of the Rabi oscillator from an exciton reservoir. We account for the initial pulse of light setting the… [Phys. Rev. B 94, 045413] Published Mon Jul 11, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Tomography of Majorana fermions with STM tips (2016)

Denis Chevallier and Jelena Klinovaja

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): Denis Chevallier and Jelena Klinovaja We investigate numerically the possibility to detect the spatial profile of Majorana fermions (MFs) by using STM tips that are made of either normal or superconducting material. In both cases, we are able to resolve the localization length and the oscillation period of the MF wave function. We show … [Phys. Rev. B 94, 035417] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Impurity invisibility in graphene: Symmetry guidelines for the design of efficient sensors (2016)

John Duffy, James Lawlor, Caio Lewenkopf, and Mauro S. Ferreira

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): John Duffy, James Lawlor, Caio Lewenkopf, and Mauro S. Ferreira Renowned for its sensitivity to detect the presence of numerous substances, graphene is an excellent chemical sensor. Unfortunately, which general features a dopant must have in order to enter the list of substances detectable by graphene are not exactly known. Here we demonstrate with a simple mode… [Phys. Rev. B 94, 045417] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Observing single-atom diffusion at a molecule-metal interface (2016)

Johannes Mielke, Jesús Martínez-Blanco, Maike V. Peters, Stefan Hecht, and Leonhard Grill

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): Johannes Mielke, Jesús Martínez-Blanco, Maike V. Peters, Stefan Hecht, and Leonhard Grill The dynamics at the interface between a close-packed porphyrin monolayer and Au(111) is investigated by time-dependent scanning tunneling microscopy, detecting the motion of single-interface adatoms in real space. Imaging sequences reveal predominant switching of the molecular appearance in adjacent… [Phys. Rev. B 94, 035416] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Mapping the intramolecular contributions to the inelastic electron tunneling signal of a molecular junction (2016)

Giuseppe Foti and Héctor Vázquez

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): Giuseppe Foti and Héctor Vázquez We present a quantitative analysis of the intramolecular origin of the inelastic electron tunneling signal of a molecular junction. We use density-functional theory to study a representative conjugated molecule with a low degree of symmetry and calculate, for all modes, the different contributions t… [Phys. Rev. B 94, 045418] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Entanglement and Majorana edge states in the Kitaev model (2016)

Saptarshi Mandal, Moitri Maiti, and Vipin Kerala Varma

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): Saptarshi Mandal, Moitri Maiti, and Vipin Kerala Varma We investigate the von Neumann entanglement entropy and Schmidt gap in the vortex-free ground state of the Kitaev model on the honeycomb lattice for square/rectangular and cylindrical subsystems. We find that, for both the subsystems, the free-fermionic contribution to the entanglement entropy S E ex… [Phys. Rev. B 94, 045421] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Extremely long-lived magnetic excitations in supported Fe chains (2016)

J. P. Gauyacq and N. Lorente

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): J. P. Gauyacq and N. Lorente We report on a theoretical study of the lifetime of the first excited state of spin chains made of an odd number of Fe atoms on C u 2 N / Cu ( 100 ) . Yan, Choi, Burgess, Rolf-Pissarczyk, and Loth [ Nat. Nanotech. 10 , 40 (2015) ] recently observed very long lifetimes in the case of F e 3 chains. We consider the … [Phys. Rev. B 94, 045420] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Coherent nonlinear optical response of graphene in the quantum Hall regime (2016)

H. K. Avetissian and G. F. Mkrtchian

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): H. K. Avetissian and G. F. Mkrtchian We study the nonlinear optical response of graphene in the quantum Hall regime to an intense laser pulse. In particular, we consider the harmonic generation process. We demonstrate that the generalized magneto-optical conductivity of graphene on the harmonics of a strong pump laser radiation has a c… [Phys. Rev. B 94, 045419] Published Tue Jul 12, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Commensurate and incommensurate magnetic order in spin-1 chains stacked on the triangular lattice in Li_{2} NiW_{2} O_{8} (2016)

K. M. Ranjith, R. Nath, M. Majumder, D. Kasinathan, M. Skoulatos, L. Keller, Y. Skourski, M. Baenitz, and A. A. Tsirlin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): K. M. Ranjith, R. Nath, M. Majumder, D. Kasinathan, M. Skoulatos, L. Keller, Y. Skourski, M. Baenitz, and A. A. Tsirlin We report the thermodynamic properties, magnetic ground state, and microscopic magnetic model of the spin-1 frustrated antiferromagnet Li 2 NiW 2 O 8 , showing successive transitions at T N 1 ≃ 18 K and T N 2 ≃ 12.5 K in zero field. Nuclear magnetic resonance and neutron diffraction reveal collinear and commensur… [Phys. Rev. B 94, 014415] Published Wed Jul 13, 2016

Schlagwort(e): Magnetism

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Theory of magnon motive force in chiral ferromagnets (2016)

Utkan Güngördü and Alexey A. Kovalev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): Utkan Güngördü and Alexey A. Kovalev We predict that magnon motive force can lead to temperature dependent, nonlinear chiral damping in both conducting and insulating ferromagnets. We estimate that this damping can significantly influence the motion of skyrmions and domain walls at finite temperatures. We also find that in systems with… [Phys. Rev. B 94, 020405(R)] Published Wed Jul 13, 2016

Schlagwort(e): Magnetism

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First- and second-harmonic detection of spin accumulation in a multiterminal lateral spin valve under high-bias ac current (2016)

Shaojie Hu, Tatsuya Nomura, Ginga Uematsu, Nagarjuna Asam, and Takashi Kimura

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): Shaojie Hu, Tatsuya Nomura, Ginga Uematsu, Nagarjuna Asam, and Takashi Kimura We have investigated the transport properties of electrically and thermally excited spin currents in a lateral spin valve consisting of a spin injector and detector with a middle ferromagnetic wire by detecting the first- and second-harmonic voltages. The first-harmonic spin signal was significantly… [Phys. Rev. B 94, 014416] Published Wed Jul 13, 2016

Schlagwort(e): Magnetism

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17

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Long-range antiferromagnetic order in epitaxial Mn_{2} GaC thin films from neutron reflectometry (2016)

A. S. Ingason, G. K. Pálsson, M. Dahlqvist, and J. Rosen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): A. S. Ingason, G. K. Pálsson, M. Dahlqvist, and J. Rosen The nature of the magnetic structure in magnetic so-called MAX phases is a topic of some controversy. Here we present unpolarized neutron-diffraction data between 3.4 and 290.0 K and momentum transfer between Q = 0.0 and 1.1 Å − 1 , as well as complementary x-ray-diffraction data on epitaxial thin films of… [Phys. Rev. B 94, 024416] Published Wed Jul 13, 2016

Schlagwort(e): Magnetism

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Smith-Purcell radiation emission in aperiodic arrays (2016)

J. R. M. Saavedra, D. Castells-Graells, and F. Javier García de Abajo

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): J. R. M. Saavedra, D. Castells-Graells, and F. Javier García de Abajo We study the Smith-Purcell light emission produced by electrons moving parallel to linear aperiodic particle arrays. This constitutes a generalization of this type of phenomenon from periodic to aperiodic structures. As in the periodic case, the emission is found to exhibit intense features in its a… [Phys. Rev. B 94, 035418] Published Wed Jul 13, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Exact asymptotic correlation functions of bilinear spin operators of the Heisenberg antiferromagnetic spin-1/2 chain (2016)

T. Vekua and G. Sun

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): T. Vekua and G. Sun Exact asymptotic expressions of the uniform parts of the two-point correlation functions of bilinear spin operators in the Heisenberg antiferromagnetic spin- 1 2 chain are obtained. Apart from the algebraic decay, the logarithmic contribution is identified, and the numerical prefactor is determined. W… [Phys. Rev. B 94, 014417] Published Thu Jul 14, 2016

Schlagwort(e): Magnetism

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Parity-time symmetry breaking in magnetic systems (2016)

Alexey Galda and Valerii M. Vinokur

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): Alexey Galda and Valerii M. Vinokur The understanding of out-of-equilibrium physics, especially dynamic instabilities and dynamic phase transitions, is one of the major challenges of contemporary science, spanning the broadest wealth of research areas that range from quantum optics to living organisms. Focusing on nonequilibrium dynam… [Phys. Rev. B 94, 020408(R)] Published Thu Jul 14, 2016

Schlagwort(e): Magnetism

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Helicity, anisotropies, and their competition in a multiferroic magnet: Insight from the phase diagram (2016)

M. V. Gvozdikova, T. Ziman, and M. E. Zhitomirsky

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): M. V. Gvozdikova, T. Ziman, and M. E. Zhitomirsky The ability to explain and predict the behavior in magnetic field is essential for any possible application of multiferroic materials. Motivated by the complex phase diagrams of MnWO 4 and other spiral multiferroics, the authors formulate and investigate the anisotropic next-nearest-neighbor Heisenberg (ANNNH) model, which is a generalization of the celebrated ANNNI model to three component quantum spins. Using real-space mean-field simulations allowed for an unbiased construction of the magnetic phase diagram with multiple commensurate and incommensurate states. In particular, the biaxial anisotropy can explain the puzzling nonferroic reentrant phase of MnWO 4 at high magnetic fields. The employed numerical technique is capable of predicting the temperature and field dependence of the ordering wave vector produced by the competition between helicity and anisotropy. An important issue raised in the present study is the effect of quantum fluctuations on the devil’s staircase known to exist for the ANNNI model, but which is replaced by a “floating” incommensurate phase for the ANNNH model. [Phys. Rev. B 94, 020406(R)] Published Thu Jul 14, 2016

Schlagwort(e): Magnetism

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Magnetic properties and Curie temperatures of disordered Heusler compounds: Co_{1+x} Fe_{2−x} Si (2016)

Julia Erika Fischer, Julie Karel, Simone Fabbrici, Peter Adler, Siham Ouardi, Gerhard H. Fecher, Franca Albertini, and Claudia Felser

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): Julia Erika Fischer, Julie Karel, Simone Fabbrici, Peter Adler, Siham Ouardi, Gerhard H. Fecher, Franca Albertini, and Claudia Felser The local atomic environments and magnetic properties were investigated for a series of Co 1 + x Fe 2 − x Si ( 0 ≤ x ≤ 1 ) Heusler compounds. While the total magnetic moment in these compounds increases with the number of valance electrons, the highest Curie temperature ( T C ) in this series was found for Co 1.5 Fe 1.… [Phys. Rev. B 94, 024418] Published Thu Jul 14, 2016

Schlagwort(e): Magnetism

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Optically induced spin-dependent diffusive transport in the presence of spin-orbit interaction for all-optical magnetization reversal (2016)

Mehrdad Elyasi and Hyunsoo Yang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): Mehrdad Elyasi and Hyunsoo Yang We have considered the effect of different spin-orbit interaction mechanisms on the process of demagnetization under the influence of short-pulse lasers. All-optical magnetization reversal of perpendicularly magnetized thin films can occur if there are sufficient strong spin-Hall, skew scattering, a… [Phys. Rev. B 94, 024417] Published Thu Jul 14, 2016

Schlagwort(e): Magnetism

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Time scales for Majorana manipulation using Coulomb blockade in gate-controlled superconducting nanowires (2016)

Michael Hell, Jeroen Danon, Karsten Flensberg, and Martin Leijnse

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-16

Beschreibung: Author(s): Michael Hell, Jeroen Danon, Karsten Flensberg, and Martin Leijnse We numerically compute the low-energy spectrum of a gate-controlled superconducting topological nanowire segmented into two islands, each Josephson coupled to a bulk superconductor. This device may host two pairs of Majorana bound states and could provide a platform for testing Majorana fusion rules… [Phys. Rev. B 94, 035424] Published Fri Jul 15, 2016

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Quantum thermal transport in stanene (2016)

Hangbo Zhou, Yongqing Cai, Gang Zhang, and Yong-Wei Zhang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-16

Beschreibung: Author(s): Hangbo Zhou, Yongqing Cai, Gang Zhang, and Yong-Wei Zhang By way of the nonequilibrium Green's function simulations and analytical expressions, the quantum thermal conductance of stanene is studied. We find that, due to the existence of Dirac fermion in stanene, the ratio of electron thermal conductance and electric conductance becomes a chemical-potential… [Phys. Rev. B 94, 045423] Published Fri Jul 15, 2016

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First-principles modeling of longitudinal spin fluctuations in itinerant electron antiferromagnets: High Néel temperature in the V_{3} Al alloy (2016)

Sergii Khmelevskyi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Sergii Khmelevskyi The V 3 Al alloy with D O 3 crystal structure belongs to the family of the very few metallic materials that exhibit a magnetically ordered state with a high ordering temperature (∼600 K) and consist only of nonmagnetic elements. We show that, similarly to the ferromagnetism in the fcc Ni (with ordering … [Phys. Rev. B 94, 024420] Published Mon Jul 18, 2016

Schlagwort(e): Magnetism

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Simulating atomic force microscope images with density functional theory: The role of nonclassical contributions to the force (2016)

Philipp Schaffhauser and Stephan Kümmel

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Philipp Schaffhauser and Stephan Kümmel Atomic force microscopy is one of the techniques that allows us to visualize objects that we cannot see directly. The question of what we actually see when we look at an atomic force microscopy image is, however, a subtle one. This paper discusses a scheme that permits the calculation of atomic force microscopy images with relatively little effort. Using electronic density functional theory, the force on the cantilever is calculated as the gradient of the effective potential that governs the electronic structure in density functional theory. In this way, nonclassical contributions to the force can efficiently be taken into account and are translated into an image. Comparison to experimental images shows that the nonclassical contribution to the force can make a visible difference. [Phys. Rev. B 94, 035426] Published Mon Jul 18, 2016

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Magnetic Dirac fermions and Chern insulator supported on pristine silicon surface (2016)

Huixia Fu, Zheng Liu, Chao Lian, Jin Zhang, Hui Li, Jia-Tao Sun, and Sheng Meng

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Huixia Fu, Zheng Liu, Chao Lian, Jin Zhang, Hui Li, Jia-Tao Sun, and Sheng Meng Emergence of ferromagnetism in nonmagnetic semiconductors is strongly desirable, especially in topological materials because of the possibility of achieving the quantum anomalous Hall effect. Based on first-principles calculations, we propose that for Si thin film grown on metal substrate, the prist… [Phys. Rev. B 94, 035427] Published Mon Jul 18, 2016

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Transport through a quantum spin Hall antidot as a spectroscopic probe of spin textures (2016)

Alexia Rod, Giacomo Dolcetto, Stephan Rachel, and Thomas L. Schmidt

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Alexia Rod, Giacomo Dolcetto, Stephan Rachel, and Thomas L. Schmidt We investigate electron transport through an antidot embedded in a narrow strip of a two-dimensional topological insulator. We focus on the most generic and experimentally relevant case with broken axial spin symmetry. Spin-nonconservation allows additional scattering processes, which change the tra… [Phys. Rev. B 94, 035428] Published Mon Jul 18, 2016

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Tunneling into and between helical edge states: Fermionic approach (2016)

D. N. Aristov and R. A. Niyazov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): D. N. Aristov and R. A. Niyazov We study the four-terminal junction of spinless Luttinger liquid wires, which describes either a corner junction of two helical edge states of topological insulators or the tunneling from the spinful wire into the helical edge state. We use the fermionic representation and the scattering state forma… [Phys. Rev. B 94, 035429] Published Mon Jul 18, 2016

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Raman spectroscopy of intercalated and misfit layer nanotubes (2016)

Matthias Staiger, Vladimir Bačić, Roland Gillen, Gal Radovsky, Konstantin Gartsman, Reshef Tenne, Thomas Heine, Janina Maultzsch, and Christian Thomsen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Matthias Staiger, Vladimir Bačić, Roland Gillen, Gal Radovsky, Konstantin Gartsman, Reshef Tenne, Thomas Heine, Janina Maultzsch, and Christian Thomsen We present Raman spectra of misfit layer ( PbS ) 1.14 NbS 2 nanotubes and lead intercalated NbS 2 nanotubes. They represent interesting model systems to investigate the nature of interlayer interaction in layered materials. A direct correlation to the Raman modes of the parent 2 H − NbS 2 compound exists, but… [Phys. Rev. B 94, 035430] Published Mon Jul 18, 2016

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Direct evidence of metallic bands in a monolayer boron sheet (2016)

Baojie Feng, Jin Zhang, Ro-Ya Liu, Takushi Iimori, Chao Lian, Hui Li, Lan Chen, Kehui Wu, Sheng Meng, Fumio Komori, and Iwao Matsuda

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Baojie Feng, Jin Zhang, Ro-Ya Liu, Takushi Iimori, Chao Lian, Hui Li, Lan Chen, Kehui Wu, Sheng Meng, Fumio Komori, and Iwao Matsuda The search for metallic boron allotropes has attracted great attention in the past decades and recent theoretical works predict the existence of metallicity in monolayer boron. Here, we synthesize the β 12 -sheet monolayer boron on a Ag(111) surface and confirm the presence of metallic boron-derived b… [Phys. Rev. B 94, 041408(R)] Published Mon Jul 18, 2016

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EuCo_{2} P_{2} : A model molecular-field helical Heisenberg antiferromagnet (2016)

N. S. Sangeetha, Eduardo Cuervo-Reyes, Abhishek Pandey, and D. C. Johnston

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): N. S. Sangeetha, Eduardo Cuervo-Reyes, Abhishek Pandey, and D. C. Johnston The metallic compound EuCo 2 P 2 with the body-centered tetragonal ThCr 2 Si 2 structure containing Eu spins-7/2 was previously shown from single-crystal neutron diffraction measurements to exhibit a helical antiferromagnetic (AFM) structure below T N = 66.5 K with the helix axis along the c axis and with th… [Phys. Rev. B 94, 014422] Published Tue Jul 19, 2016

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Role of spin-orbit interaction in the ultrafast demagnetization of small iron clusters (2016)

Maria Stamenova, Jacopo Simoni, and Stefano Sanvito

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): Maria Stamenova, Jacopo Simoni, and Stefano Sanvito The ultrafast demagnetization of small iron clusters initiated by an intense optical excitation is studied from the time-dependent spin density functional theory (TDSDFT). In particular we investigate the effect of the spin-orbit interaction on the onset of the demagnetization process. It is found t… [Phys. Rev. B 94, 014423] Published Tue Jul 19, 2016

Schlagwort(e): Magnetism

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Neutron spin-echo study of the critical dynamics of spin-5/2 antiferromagnets in two and three dimensions (2016)

K. F. Tseng, T. Keller, A. C. Walters, R. J. Birgeneau, and B. Keimer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): K. F. Tseng, T. Keller, A. C. Walters, R. J. Birgeneau, and B. Keimer We report a neutron spin-echo study of the critical dynamics in the S = 5 2 antiferromagnets MnF 2 and Rb 2 MnF 4 with three-dimensional (3D) and two-dimensional (2D) spin systems, respectively, in zero external field. Both compounds are Heisenberg antiferromagnets with a small uniaxial anisotropy resultin… [Phys. Rev. B 94, 014424] Published Tue Jul 19, 2016

Schlagwort(e): Magnetism

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Model for multishot all-thermal all-optical switching in ferromagnets (2016)

J. Gorchon, Y. Yang, and J. Bokor

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): J. Gorchon, Y. Yang, and J. Bokor All-optical magnetic switching (AOS) is a recently observed rich and puzzling phenomenon that offers promising technological applications. However, a fundamental understanding of the underlying mechanisms remains elusive. Here we present a model for multishot helicity-dependent AOS in ferromagnetic … [Phys. Rev. B 94, 020409(R)] Published Tue Jul 19, 2016

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Intrinsic magnetic properties in R(Fe_{1−x} Co_{x} )_{11} TiZ(R=Yand Ce;Z=H,C,and N) (2016)

Liqin Ke and Duane D. Johnson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): Liqin Ke and Duane D. Johnson To guide improved properties coincident with reduction of critical materials in permanent magnets, we investigate via density functional theory (DFT) the intrinsic magnetic properties of a promising system, R ( Fe 1 − x Co x ) 11 Ti Z with R = Y , Ce and interstitial doping ( Z = H , C , N ) . The magnetization M , Curie t… [Phys. Rev. B 94, 024423] Published Tue Jul 19, 2016

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Theory of light-induced effective magnetic field in Rashba ferromagnets (2016)

Alireza Qaiumzadeh and Mikhail Titov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Alireza Qaiumzadeh and Mikhail Titov Motivated by recent experiments on all-optical magnetization reversal in conductive ferromagnetic thin films we use nonequilibrium formalism to calculate the effective magnetic field induced in a Rashba ferromagnet by a short laser pulse. The main contribution to the effect originates in the direct … [Phys. Rev. B 94, 014425] Published Wed Jul 20, 2016

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Magnetoelectric effect in simple collinear antiferromagnetic spinels (2016)

Rana Saha, Somnath Ghara, Emmanuelle Suard, Dong Hyun Jang, Kee Hoon Kim, N. V. Ter-Oganessian, and A. Sundaresan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Rana Saha, Somnath Ghara, Emmanuelle Suard, Dong Hyun Jang, Kee Hoon Kim, N. V. Ter-Oganessian, and A. Sundaresan We report the discovery of the linear magnetoelectric effect in a family of spinel oxides, C o 3 O 4 and Mn B 2 O 4 ( B = Al , Ga ) with simple collinear antiferromagnetic spin structure. An external magnetic field induces a dielectric anomaly at T N , accompanied by the generation of electric polarization that var… [Phys. Rev. B 94, 014428] Published Wed Jul 20, 2016

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Engineering chiral density waves and topological band structures by multiple-Q superpositions of collinear up-up-down-down orders (2016)

Satoru Hayami, Ryo Ozawa, and Yukitoshi Motome

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Satoru Hayami, Ryo Ozawa, and Yukitoshi Motome Magnetic orders characterized by multiple ordering vectors harbor noncollinear and noncoplanar spin textures and can be a source of unusual electronic properties through the spin Berry phase mechanism. We theoretically show that such multiple- Q states are stabilized in itinerant magnets in the form … [Phys. Rev. B 94, 024424] Published Wed Jul 20, 2016

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Tunable point nodes from line-node semimetals via application of light (2016)

Awadhesh Narayan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Awadhesh Narayan We propose that illumination with light provides a useful platform for creating tunable semimetals. We show that by shining light on semimetals with a line degeneracy, one can convert them to a point-node semimetal. These point nodes are adjustable, and their position can be controlled by simply rot… [Phys. Rev. B 94, 041409(R)] Published Wed Jul 20, 2016

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Controlling the dark exciton spin eigenstates by external magnetic field (2016)

L. Gantz, E. R. Schmidgall, I. Schwartz, Y. Don, E. Waks, G. Bahir, and D. Gershoni

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): L. Gantz, E. R. Schmidgall, I. Schwartz, Y. Don, E. Waks, G. Bahir, and D. Gershoni We study the dark exciton's behavior as a coherent physical two-level spin system (qubit) using an external magnetic field in the Faraday configuration. Our studies are based on polarization-sensitive intensity autocorrelation measurements of the optical transition resulting from the recombination o… [Phys. Rev. B 94, 045426] Published Wed Jul 20, 2016

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Thermopower signatures and spectroscopy of the canyon of conductance suppression (2016)

G. Kiršanskas, S. Hammarberg, O. Karlström, and A. Wacker

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): G. Kiršanskas, S. Hammarberg, O. Karlström, and A. Wacker Interference effects in quantum dots between different transport channels can lead to a strong suppression of conductance, which cuts like a canyon through the common conductance plot [ Phys. Rev. Lett. 104 , 186804 (2010) ]. In the present work we consider the thermoelectric transport properties of th… [Phys. Rev. B 94, 045427] Published Wed Jul 20, 2016

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Thermal spin injection and interface insensitivity in permalloy/aluminum metallic nonlocal spin valves (2016)

A. Hojem, D. Wesenberg, and B. L. Zink

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-22

Beschreibung: Author(s): A. Hojem, D. Wesenberg, and B. L. Zink In a wide range of experiments where electrical currents are used to inject angular momentum, or spin currents, from a metallic ferromagnet into a nonmagnetic metal, the interface plays a critical role. Whether in the giant magnetoresistance effect or in nonlocal spin valves, a loss of spin polarization of an electrical current crossing the interface is seen to reduce the spin current and lead to smaller overall response in sensors. The authors here compare electrical spin injection to the more recently discovered thermal spin injection in a nonlocal spin valve. They show that, despite a strong reduction of electrical spin injection that they tie to the loss of interfacial spin polarization, thermal spin injection remains a large effect. This highlights that thermal spin injection (also called the spin-dependent Seebeck effect) can proceed by new physical mechanisms not possible in the electrically driven case, potentially involving incoherent spin pumping and collective behavior of magnetization in the oxidized interface layer. Better understanding of these interface effects could lead to new ways to increase sensitivity of next-generation magnetic sensors and efficiency of sources of spin current in metallic systems. [Phys. Rev. B 94, 024426] Published Thu Jul 21, 2016

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Interplay between magnetism and energetics in Fe-Cr alloys from a predictive noncollinear magnetic tight-binding model (2016)

R. Soulairol, C. Barreteau, and Chu-Chun Fu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-22

Beschreibung: Author(s): R. Soulairol, C. Barreteau, and Chu-Chun Fu Magnetism is a key driving force controlling several thermodynamic and kinetic properties of Fe-Cr systems. We present a tight-binding model for Fe-Cr, where magnetism is treated beyond the usual collinear approximation. A major advantage of this model consists in a rather simple fitting procedure. … [Phys. Rev. B 94, 024427] Published Thu Jul 21, 2016

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Metallic behavior induced by potassium doping of the trigonal antiferromagnetic insulator EuMn_{2} As_{2} (2016)

V. K. Anand and D. C. Johnston

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-23

Beschreibung: Author(s): V. K. Anand and D. C. Johnston We report magnetic susceptibility χ , isothermal magnetization M , heat capacity C p , and electrical resistivity ρ measurements on undoped EuMn 2 As 2 and K-doped Eu 0.96 K 0.04 Mn 2 As 2 and Eu 0.93 K 0.07 Mn 2 As 2 single crystals with the trigonal CaAl 2 Si 2 -type structure as a function of temperature T and magnetic f… [Phys. Rev. B 94, 014431] Published Fri Jul 22, 2016

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Thermal expansion and magnetovolume studies of the itinerant helical magnet MnSi (2016)

A. E. Petrova and S. M. Stishov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-23

Beschreibung: Author(s): A. E. Petrova and S. M. Stishov Thermal expansion and forced magnetostriction of MnSi were measured as a function of temperature down to 5 K and magnetic field to 3 T. The small length (volume) discontinuity at the magnetic phase transition in MnSi decreases with application of magnetic field to a value Δ L / L ∼ 10 − 7 , and then suddenl… [Phys. Rev. B 94, 020410(R)] Published Fri Jul 22, 2016

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Structure and magnetism of cobalt at high pressure and low temperature (2016)

R. Torchio, C. Marini, Y. O. Kvashnin, I. Kantor, O. Mathon, G. Garbarino, C. Meneghini, S. Anzellini, F. Occelli, P. Bruno, A. Dewaele, and S. Pascarelli

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-23

Beschreibung: Author(s): R. Torchio, C. Marini, Y. O. Kvashnin, I. Kantor, O. Mathon, G. Garbarino, C. Meneghini, S. Anzellini, F. Occelli, P. Bruno, A. Dewaele, and S. Pascarelli The magnetic and structural properties of cobalt were investigated under high pressure (160 GPa) and low temperature (50 K), by synchrotron K-edge x-ray magnetic circular dichroism and x-ray diffraction. A quasihydrostatic equation of state was measured up to 160 GPa. We found that uniaxial stress p… [Phys. Rev. B 94, 024429] Published Fri Jul 22, 2016

Schlagwort(e): Magnetism

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Topology of spin meron pairs in coupled Ni/Fe/Co/Cu(001) disks (2016)

A. Tan, J. Li, A. Scholl, E. Arenholz, A. T. Young, Q. Li, C. Hwang, and Z. Q. Qiu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-26

Beschreibung: Author(s): A. Tan, J. Li, A. Scholl, E. Arenholz, A. T. Young, Q. Li, C. Hwang, and Z. Q. Qiu The meron is a special topological object that carries only one-half of the topological charge unit. In condensed matter physics, a spin meron corresponds to one-half of a spin skyrmion. As compared to the many fascinating topological properties of skyrmion materials, little is known of the properti… [Phys. Rev. B 94, 014433] Published Mon Jul 25, 2016

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Crystal-field parameters of the rare-earth pyrochlores R_{2} Ti_{2} O_{7} (R=Tb, Dy, and Ho) (2016)

M. Ruminy, E. Pomjakushina, K. Iida, K. Kamazawa, D. T. Adroja, U. Stuhr, and T. Fennell

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): M. Ruminy, E. Pomjakushina, K. Iida, K. Kamazawa, D. T. Adroja, U. Stuhr, and T. Fennell In this work, we present inelastic neutron scattering experiments which probe the single ion ground states of the rare-earth pyrochlores R 2 Ti 2 O 7 ( R = Tb , Dy, Ho). Dy 2 Ti 2 O 7 and Ho 2 Ti 2 O 7 are dipolar spin ices, now often described as hosts of emergent magnetic monopole excitations; the low-temperature st… [Phys. Rev. B 94, 024430] Published Mon Jul 25, 2016

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Tunable spin-wave frequency gap in anisotropy-graded FePt films obtained by ion irradiation (2016)

S. Tacchi, M. G. Pini, A. Rettori, G. Varvaro, A. di Bona, S. Valeri, F. Albertini, P. Lupo, and F. Casoli

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): S. Tacchi, M. G. Pini, A. Rettori, G. Varvaro, A. di Bona, S. Valeri, F. Albertini, P. Lupo, and F. Casoli The effect of graded anisotropy on static and dynamic magnetic properties of Ar + -irradiated FePt films has been investigated by static magnetometry, magnetic force microscopy, and Brillouin light scattering from thermally excited spin waves. A gradual variation of magnetic anisotropy with film thick… [Phys. Rev. B 94, 024432] Published Mon Jul 25, 2016

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Influence of the Dzyaloshinskii-Moriya interaction on the FMR spectrum of magnonic crystals and confined structures (2016)

M. Mruczkiewicz and M. Krawczyk

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): M. Mruczkiewicz and M. Krawczyk We study the effect of surface-induced Dzyaloshinskii-Moriya interaction (DMI) on the ferromagnetic resonance (FMR) spectrum of thickness-modulated one-dimensional magnonic crystals and isolated stripes. The DMI is found to substantially increases the intensity of absorption peaks and shifts the fre… [Phys. Rev. B 94, 024434] Published Mon Jul 25, 2016

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Exotic quantum critical point on the surface of three-dimensional topological insulator (2016)

Zhen Bi, Yi-Zhuang You, and Cenke Xu

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Zhen Bi, Yi-Zhuang You, and Cenke Xu In the last few years a lot of exotic and anomalous topological phases were constructed by proliferating the vortexlike topological defects on the surface of the 3 d topological insulator (TI) [Fidkowski et al. , Phys. Rev. X 3 , 041016 (2013) ; Chen et al. , Phys. Rev. B 89 , 165132 (2014) ; Bonderson … [Phys. Rev. B 94, 024433] Published Mon Jul 25, 2016

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Signatures of topological quantum phase transitions in driven and dissipative qubit arrays (2016)

Y. L. Dong, Titus Neupert, R. Chitra, and Sebastian Schmidt

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Y. L. Dong, Titus Neupert, R. Chitra, and Sebastian Schmidt We study photonic signatures of symmetry broken and topological phases in a driven, dissipative circuit QED realization of spin-1/2 chains. Specifically, we consider the transverse-field XY model and a dual model with three-spin interactions. The former has a ferromagnetic and a paramagnetic phase, … [Phys. Rev. B 94, 035441] Published Mon Jul 25, 2016

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Negative dynamic conductivity of a current-driven array of graphene nanoribbons (2016)

S. A. Mikhailov, N. A. Savostianova, and A. S. Moskalenko

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): S. A. Mikhailov, N. A. Savostianova, and A. S. Moskalenko We consider a periodic array of graphene nanoribbons under the action of a strong dc electric field E 0 and an external electromagnetic excitation with the frequency ω and the lateral wave vector q . Solving the quasiclassical Boltzmann kinetic equation and calculating the surface dynamic conductivity… [Phys. Rev. B 94, 035439] Published Mon Jul 25, 2016

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Effects of oxygen contamination on monolayer GeSe: A computational study (2016)

I. S. S. de Oliveira and R. Longuinhos

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): I. S. S. de Oliveira and R. Longuinhos Natural oxidation is a common degradation mechanism of both mechanical and electronic properties for most of the new two-dimensional materials. From another perspective, controlled oxidation is an option for tuning material properties, thereby expanding possibilities for real-world applications. Und… [Phys. Rev. B 94, 035440] Published Mon Jul 25, 2016

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Magnetic edge states and magnetotransport in graphene antidot barriers (2016)

M. R. Thomsen, S. R. Power, A.-P. Jauho, and T. G. Pedersen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-29

Beschreibung: Author(s): M. R. Thomsen, S. R. Power, A.-P. Jauho, and T. G. Pedersen Magnetic fields are often used for characterizing transport in nanoscale materials. Recent magnetotransport experiments have demonstrated that ballistic transport is possible in graphene antidot lattices (GALs). These experiments have inspired the present theoretical study of GALs in a perpendicular… [Phys. Rev. B 94, 045438] Published Thu Jul 28, 2016

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In situ x-ray scattering study of Ag island growth on Si(111)7×7 (2016)

Yiyao Chen, M. W. Gramlich, S. T. Hayden, and P. F. Miceli

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Yiyao Chen, M. W. Gramlich, S. T. Hayden, and P. F. Miceli We report on the epitaxial relationship between Ag and the Si(111) 7 × 7 substrate where the wetting layer and the emergence of islands was investigated using in situ x-ray scattering with a combination of grazing incidence diffraction, specular reflectivity, and crystal truncation rod measurements. Th… [Phys. Rev. B 94, 045437] Published Thu Jul 28, 2016

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Electronic structure of interfaces between hexagonal and rhombohedral graphite (2016)

M. Taut and K. Koepernik

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): M. Taut and K. Koepernik An analysis of the electronic structure of interfaces between hexagonal ( A B ) and rhombohedral ( A B C ) graphite based on density functional theory is presented. Both of the two simplest interface structures host (localized) interface bands, which are located around the K point in the Brillouin zone, an… [Phys. Rev. B 94, 035446] Published Thu Jul 28, 2016

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Crystal-field states of Kondo lattice heavy fermions CeRuSn_{3} and CeRhSn_{3} (2016)

V. K. Anand, D. T. Adroja, D. Britz, A. M. Strydom, J. W. Taylor, and W. Kockelmann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-30

Beschreibung: Author(s): V. K. Anand, D. T. Adroja, D. Britz, A. M. Strydom, J. W. Taylor, and W. Kockelmann Inelastic neutron scattering experiments have been carried out to determine the crystal-field states of the Kondo lattice heavy fermions CeRuSn 3 and CeRhSn 3 . Both the compounds crystallize in LaRuSn 3 -type cubic structure (space group P m 3 ¯ n ) in which the Ce atoms occupy two distinct crystallographic … [Phys. Rev. B 94, 014440] Published Fri Jul 29, 2016

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μSR insight into the impurity problem in quantum kagome antiferromagnets (2016)

M. Gomilšek, M. Klanjšek, M. Pregelj, H. Luetkens, Y. Li, Q. M. Zhang, and A. Zorko

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): M. Gomilšek, M. Klanjšek, M. Pregelj, H. Luetkens, Y. Li, Q. M. Zhang, and A. Zorko Impurities, which are unavoidable in real materials, may play an important role in the magnetism of frustrated spin systems with a spin-liquid ground state. We address the impurity issue in quantum kagome antiferromagnets by investigating ZnCu 3 ( OH ) 6 SO 4 (Zn-brochantite) by means of muon spin spectros… [Phys. Rev. B 94, 024438] Published Fri Jul 29, 2016

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Size dependence of structural stability and magnetization of nickel clusters from real-space pseudopotentials (2016)

Masahiro Sakurai, Jaime Souto-Casares, and James R. Chelikowsky

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Masahiro Sakurai, Jaime Souto-Casares, and James R. Chelikowsky We examine the structural stability and magnetization for nickel clusters containing up to 500 atoms by performing first-principles calculations based on pseudopotential in real space computed within density-functional theory. After structural relaxation, Ni clusters in this size range favor either … [Phys. Rev. B 94, 024437] Published Fri Jul 29, 2016

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Computational simulation of subatomic-resolution AFM and STM images for graphene/hexagonal boron nitride heterostructures with intercalated defects (2016)

Junsu Lee, Minjung Kim, James R. Chelikowsky, and Gunn Kim

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Junsu Lee, Minjung Kim, James R. Chelikowsky, and Gunn Kim Using ab initio density functional calculations, we predict subatomic-resolution atomic force microscopy (AFM) and scanning tunneling microscopy (STM) images of vertical heterostructures of graphene/hexagonal boron nitride (h-BN) with an intercalated metal atom (Li, K, Cr, Mn, Co, or Cu), and study … [Phys. Rev. B 94, 035447] Published Fri Jul 29, 2016

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Stress-induced magnetic domain selection reveals a conical ground state for the multiferroic phase of Mn_{2} GeO_{4} (2016)

J. S. White, T. Honda, R. Sibille, N. Gauthier, V. Dmitriev, Th. Strässle, Ch. Niedermayer, T. Kimura, and M. Kenzelmann

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): J. S. White, T. Honda, R. Sibille, N. Gauthier, V. Dmitriev, Th. Strässle, Ch. Niedermayer, T. Kimura, and M. Kenzelmann At ambient pressure P and below 5.5 K, olivine-type Mn 2 GeO 4 hosts a multiferroic (MF) phase where a multicomponent, i.e., multi- k magnetic order generates spontaneous ferromagnetism and ferroelectricity (FE) along the c axis. Under high P the FE disappears above 6 GPa, yet the P evolution of the mag… [Phys. Rev. B 94, 024439] Published Fri Jul 29, 2016

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Radiative coupling of A and B excitons in ZnO (2016)

Takashi Kinoshita and Hajime Ishihara

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Takashi Kinoshita and Hajime Ishihara Radiation-induced coupling between A and B excitons in ZnO is theoretically studied. Considering the center-of-mass motion of excitons in bulk and thin-film structures, we calculate the eigenmodes of an exciton–radiation coupled system and reveal the ratio of each excitonic component in the respecti… [Phys. Rev. B 94, 045441] Published Fri Jul 29, 2016

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Epitaxially stabilized iron thin films via effective strain relief from steps (2016)

T. Miyamachi, S. Nakashima, S. Kim, N. Kawamura, Y. Tatetsu, Y. Gohda, S. Tsuneyuki, and F. Komori

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): T. Miyamachi, S. Nakashima, S. Kim, N. Kawamura, Y. Tatetsu, Y. Gohda, S. Tsuneyuki, and F. Komori The growth and electronic structures of about 7 monolayer-thick Fe thin films on a vicinal Cu(001) surface have been investigated by scanning tunneling microscopy. We find from atomically resolved observations that the Fe epitaxial fcc(001) lattice is stabilized near the step edges, while several ki… [Phys. Rev. B 94, 045439] Published Fri Jul 29, 2016

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Linear scaling approach for atomistic calculation of excitonic properties of 10-million-atom nanostructures (2016)

Piotr T. Różański and Michał Zieliński

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Piotr T. Różański and Michał Zieliński Numerical calculations of excitonic properties of novel nanostructures, such as nanowire and crystal phase quantum dots, must combine atomistic accuracy with an approachable computational complexity. The key difficulty comes from the fact that excitonic spectra details arise from atomic-scale contri… [Phys. Rev. B 94, 045440] Published Fri Jul 29, 2016

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Zero-energy modes and valley asymmetry in the Hofstadter spectrum of bilayer graphene van der Waals heterostructures with hBN (2016)

Xi Chen, J. R. Wallbank, M. Mucha-Kruczyński, E. McCann, and V. I. Fal'ko

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Xi Chen, J. R. Wallbank, M. Mucha-Kruczyński, E. McCann, and V. I. Fal'ko We investigate the magnetic minibands of a heterostructure consisting of bilayer graphene (BLG) and hexagonal boron nitride (hBN) by numerically diagonalizing a two-band Hamiltonian that describes electrons in BLG in the presence of a moiré potential. Due to inversion-symmetry breaking characteristi… [Phys. Rev. B 94, 045442] Published Fri Jul 29, 2016

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Topological phase and edge states dependence of the RKKY interaction in zigzag silicene nanoribbon (2016)

Moslem Zare, Fariborz Parhizgar, and Reza Asgari

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Moslem Zare, Fariborz Parhizgar, and Reza Asgari We propose versatile materials based on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in a zigzag silicene nanoribbon (ZSNR) on half filling in the presence of an out-of-plane electric field. We show that the topological phase transition in the band dispersion of ZSNR can be probed by using t… [Phys. Rev. B 94, 045443] Published Fri Jul 29, 2016

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Magnons in disordered nonstoichiometric low-dimensional magnets (2016)

Paweł Buczek, Leonid M. Sandratskii, Nadine Buczek, Stefan Thomas, Giovanni Vignale, and Arthur Ernst

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Paweł Buczek, Leonid M. Sandratskii, Nadine Buczek, Stefan Thomas, Giovanni Vignale, and Arthur Ernst We study spin excitation spectra of one-, two-, and three-dimensional magnets featuring nonmagnetic defects at a wide range of concentrations. Taking the Heisenberg model as the starting point, we tackle the problem by both direct numerical simulations in large supercells and using a semianalytic co… [Phys. Rev. B 94, 054407] Published Tue Aug 02, 2016

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Tailoring transport properties of phase-separated manganite films with ordered magnetic nanostructures (2016)

V. Vlaminck, W. Yánez, J. Hoffman, A. Hoffmann, and D. Niebieskikwiat

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): V. Vlaminck, W. Yánez, J. Hoffman, A. Hoffmann, and D. Niebieskikwiat The magnetotransport properties of thin manganite films ( La 0.7 Ca 0.3 MnO 3 ) coupled with arrays of permalloy (Py) nanodots deposited on the surface of the film are studied as a function of temperature, magnetic field, and the size of the dots. In the presence of the magnetic dots, a reduction of the el… [Phys. Rev. B 94, 064404] Published Tue Aug 02, 2016

Schlagwort(e): Magnetism

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Crossover from retro to specular Andreev reflections in bilayer graphene (2016)

Dmitri K. Efetov and Konstantin B. Efetov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): Dmitri K. Efetov and Konstantin B. Efetov Ongoing experimental progress in the preparation of ultraclean graphene/superconductor (SC) interfaces enabled the recent observation of specular interband Andreev reflections (ARs) at bilayer graphene ( BLG ) / NbSe 2 van der Waals interfaces [Efetov et al. , Nat. Phys. 12 , 328 (2016) ]. Motivated by this… [Phys. Rev. B 94, 075403] Published Tue Aug 02, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Valley-dependent band structure and valley polarization in periodically modulated graphene (2016)

Wei-Tao Lu

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In: Physical Review B

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): Wei-Tao Lu The valley-dependent energy band and transport property of graphene under a periodic magnetic-strained field are studied, where the time-reversal symmetry is broken and the valley degeneracy is lifted. The considered superlattice is composed of two different barriers, providing more degrees of freed… [Phys. Rev. B 94, 085403] Published Tue Aug 02, 2016

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Free-standing electronic character of monolayer MoS_{2} in van der Waals epitaxy (2016)

Ho; Kwon Kim (김호권), Dumitru Dumcenco, Mathieu Frégnaux, Anass Benayad, Ming-Wei Chen, Yen-Cheng Kung, Andras Kis, and Olivier Renault

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-08-03

Beschreibung: Author(s): HoKwon Kim (김호권), Dumitru Dumcenco, Mathieu Frégnaux, Anass Benayad, Ming-Wei Chen, Yen-Cheng Kung, Andras Kis, and Olivier Renault We have evaluated as-grown Mo S 2 crystals, epitaxially grown on a monocrystalline sapphire by chemical vapor deposition (CVD), with direct electronic band-structure measurements by energy-filtered k -space photoelectron emission microscopy performed with a conventional laboratory vacuum ultraviolet He… [Phys. Rev. B 94, 081401(R)] Published Mon Aug 01, 2016

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Piezoelectricity in planar boron nitride via a geometric phase (2016)

Matthias Droth, Guido Burkard, and Vitor M. Pereira

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-08-04

Beschreibung: Author(s): Matthias Droth, Guido Burkard, and Vitor M. Pereira Due to their low surface mass density, two-dimensional materials with a strong piezoelectric response are interesting for nanoelectromechanical systems with high force sensitivity. Unlike graphene, the two sublattices in a monolayer of hexagonal boron nitride (hBN) are occupied by different elements… [Phys. Rev. B 94, 075404] Published Wed Aug 03, 2016

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Crystalline and electronic structure of single-layer TaS_{2} (2016)

Charlotte E. Sanders, Maciej Dendzik, Arlette S. Ngankeu, Andreas Eich, Albert Bruix, Marco Bianchi, Jill A. Miwa, Bjørk Hammer, Alexander A. Khajetoorians, and Philip Hofmann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-08-04

Beschreibung: Author(s): Charlotte E. Sanders, Maciej Dendzik, Arlette S. Ngankeu, Andreas Eich, Albert Bruix, Marco Bianchi, Jill A. Miwa, Bjørk Hammer, Alexander A. Khajetoorians, and Philip Hofmann Single-layer TaS 2 is epitaxially grown on Au(111) substrates. The resulting two-dimensional crystals adopt the 1 H polymorph. The electronic structure is determined by angle-resolved photoemission spectroscopy and found to be in excellent agreement with density functional theory calculations. The sin… [Phys. Rev. B 94, 081404(R)] Published Wed Aug 03, 2016

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Thermally stable magnetic skyrmions in multilayer synthetic antiferromagnetic racetracks (2016)

Xichao Zhang, Motohiko Ezawa, and Yan Zhou

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Xichao Zhang, Motohiko Ezawa, and Yan Zhou A magnetic skyrmion is a topological magnetization structure with a nanometric size and a well-defined swirling spin distribution, which is anticipated to be an essential building block for novel skyrmion-based device applications. We study the motion of magnetic skyrmions in multilayer synthetic an… [Phys. Rev. B 94, 064406] Published Wed Aug 03, 2016

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Ultranarrow resonance in Coulomb drag between quantum wires at coinciding densities (2016)

A. P. Dmitriev, I. V. Gornyi, and D. G. Polyakov

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In: Physical Review B

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Beschreibung: Author(s): A. P. Dmitriev, I. V. Gornyi, and D. G. Polyakov We investigate the influence of the chemical potential mismatch Δ (different electron densities) on Coulomb drag between two parallel ballistic quantum wires. For pair collisions, the drag resistivity ρ D ( Δ ) shows a peculiar anomaly at Δ = 0 with ρ D being finite at Δ = 0 and vanishing at any nonzero Δ . T… [Phys. Rev. B 94, 085404] Published Wed Aug 03, 2016

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Giant perpendicular magnetic anisotropy of an individual atom on two-dimensional transition metal dichalcogenides (2016)

Dorj Odkhuu

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In: Physical Review B

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Publikationsdatum: 2016-08-05

Beschreibung: Author(s): Dorj Odkhuu Exploring magnetism and magnetic anisotropy in otherwise nonmagnetic two-dimensional materials, such as graphene and transition metal dichalcogenides, is at the heart of spintronics research. Herein, using first-principles calculations we explore the possibility of reaching an atomic-scale perpendic… [Phys. Rev. B 94, 060403(R)] Published Thu Aug 04, 2016

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Magnetic quantization of sp^{3} bonding in monolayer gray tin (2016)

Szu-Chao Chen, Chung-Lin Wu, Jhao-Ying Wu, and Ming-Fa Lin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-09

Beschreibung: Author(s): Szu-Chao Chen, Chung-Lin Wu, Jhao-Ying Wu, and Ming-Fa Lin A generalized tight-binding model, which is based on the subenvelope functions of the different sublattices, is developed to explore the novel magnetic quantization in monolayer gray tin (tinene). The effects due to the s p 3 bonding, the spin-orbital coupling, the magnetic field, and the electric fie… [Phys. Rev. B 94, 045410] Published Fri Jul 08, 2016

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Magnetostructural coupling, magnetic ordering, and cobalt spin reorientation in metallic Pr_{0.5} Sr_{0.5} CoO_{3} cobaltite (2016)

José Luis García-Muñoz, Jessica Padilla-Pantoja, Xavier Torrelles, Javier Blasco, Javier Herrero-Martín, Bernat Bozzo, and José A. Rodríguez-Velamazán

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): José Luis García-Muñoz, Jessica Padilla-Pantoja, Xavier Torrelles, Javier Blasco, Javier Herrero-Martín, Bernat Bozzo, and José A. Rodríguez-Velamazán In half-doped P r 0.50 A 0.50 Co O 3 metallic perovskites, the spin-lattice coupling brings about distinct magnetostructural transitions for A = Ca and A = Sr at temperatures close to ∼100 K. However, the ground magnetic properties of P r 0.50 S r 0.50 Co O 3 (PSCO) strongly differ from P r 0.50 C a 0.50 Co O 3 ones, where a … [Phys. Rev. B 94, 014411] Published Mon Jul 11, 2016

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Finite-temperature interatomic exchange and magnon softening in Fe overlayers on Ir(001) (2016)

D. C. M. Rodrigues, A. Szilva, A. B. Klautau, A. Bergman, O. Eriksson, and C. Etz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): D. C. M. Rodrigues, A. Szilva, A. B. Klautau, A. Bergman, O. Eriksson, and C. Etz We evaluate how thermal effects soften the magnon dispersion in 6 layers of Fe(001) on top of Ir(001). We perform a systematic study considering noncollinear spin arrangement and calculate configuration-dependent exchange parameters J i j n c following the methodology described by Szilva et al. [ Phys. … [Phys. Rev. B 94, 014413] Published Mon Jul 11, 2016

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Tuning the magnetocrystalline anisotropy in RCoPO by means of R substitution: A ferromagnetic resonance study (2016)

G. Prando, A. Alfonsov, A. Pal, V. P. S. Awana, B. Büchner, and V. Kataev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): G. Prando, A. Alfonsov, A. Pal, V. P. S. Awana, B. Büchner, and V. Kataev We report on broad-band electron-spin resonance measurements performed within the itinerant ferromagnetic phase of R CoPO ( R = La, Pr, Nd, and Sm). We reveal that the R substitution is highly effective in gradually introducing a sizable easy-plane magnetocrystalline anisotropy within the Co sublattic… [Phys. Rev. B 94, 024412] Published Mon Jul 11, 2016

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Theoretical study of plasmonic lasing in junctions with many molecules (2016)

Yuan Zhang, Klaus Mølmer, and Volkhard May

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): Yuan Zhang, Klaus Mølmer, and Volkhard May We calculate the quantum state of the plasmon field excited by an ensemble of molecular emitters, which are driven by exchange of electrons with metallic nanoparticle electrodes. Assuming identical emitters that are coupled collectively to the plasmon mode but are otherwise subject to independent re… [Phys. Rev. B 94, 045412] Published Mon Jul 11, 2016

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Magneto-optical transport properties of monolayer WSe_{2} (2016)

M. Tahir and P. Vasilopoulos

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-12

Beschreibung: Author(s): M. Tahir and P. Vasilopoulos The recent experimental realization of a high quality WSe 2 leads to the possibility of magneto-optical measurements and the manipulation of the spin and valley degrees of freedom. We study the influence of the very strong spin-orbit coupling and of the anisotropic lifting of the valley pseudospin de… [Phys. Rev. B 94, 045415] Published Mon Jul 11, 2016

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Spin pumping damping and magnetic proximity effect in Pd and Pt spin-sink layers (2016)

M. Caminale, A. Ghosh, S. Auffret, U. Ebels, K. Ollefs, F. Wilhelm, A. Rogalev, and W. E. Bailey

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): M. Caminale, A. Ghosh, S. Auffret, U. Ebels, K. Ollefs, F. Wilhelm, A. Rogalev, and W. E. Bailey Ultrathin films of the heavy elements Pd and Pt are widely used in spintronics as converters between charge and spin currents and vice versa. One open question has been whether the strongly paramagnetic nature of these elements influences the interconversion process. The authors show, using a combination of ferromagnetic resonance and x-ray magnetic circular dichroism measurements, that a related spin current absorption process (spin pumping damping) responds to the presence of ferromagnetic order in the polarizable Pd and Pt layers. They observe a change in the thickness dependence of spin current absorption when the Pd and Pt layers are in direct contact with a ferromagnet, compared with when they are in indirect contact. This change correlates with the presence of induced magnetic moments in Pd and Pt as revealed by element-specific x-ray magnetic circular dichroism magnetometry. The results show that the decoherence process for spin current in such layers is not independent of geometry, but rather is influenced by the presence of induced ferromagnetic order. [Phys. Rev. B 94, 014414] Published Tue Jul 12, 2016

Schlagwort(e): Magnetism

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Strong enhancement of spin ordering by A-site magnetic ions in the ferrimagnet CaCu_{3} Fe_{2} Os_{2} O_{12} (2016)

Hongshan Deng, Min Liu, Jianhong Dai, Zhiwei Hu, Changyang Kuo, Yunyu Yin, Junye Yang, Xiao Wang, Qing Zhao, Yuanji Xu, Zhaoming Fu, Jianwang Cai, Haizhong Guo, Kuijuan Jin, Tunwen Pi, Yunliang Soo, Guanghui Zhou, Jinguang Cheng, Kai Chen, Philippe Ohresser, Yi-feng Yang, Changqing Jin, Liu-Hao Tjeng, and Youwen Long

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): Hongshan Deng, Min Liu, Jianhong Dai, Zhiwei Hu, Changyang Kuo, Yunyu Yin, Junye Yang, Xiao Wang, Qing Zhao, Yuanji Xu, Zhaoming Fu, Jianwang Cai, Haizhong Guo, Kuijuan Jin, Tunwen Pi, Yunliang Soo, Guanghui Zhou, Jinguang Cheng, Kai Chen, Philippe Ohresser, Yi-feng Yang, Changqing Jin, Liu-Hao Tjeng, and Youwen Long A B O 3 perovskite is a kind of very important functional material with versatile physical properties. Although B -site chemical substitution with various magnetic ions has been widely investigated, the A -site doping with magnetic transition metal is little known. Here we report A A 3 ′ B 2 B 2 ′ O 12 -type A - and… [Phys. Rev. B 94, 024414] Published Tue Jul 12, 2016

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Crystal structure and partial Ising-like magnetic ordering of orthorhombic Dy_{2} TiO_{5} (2016)

Jacob Shamblin, Stuart Calder, Zhiling Dun, Minseong Lee, Eun Sang Choi, Joerg Neuefeind, Haidong Zhou, and Maik Lang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-13

Beschreibung: Author(s): Jacob Shamblin, Stuart Calder, Zhiling Dun, Minseong Lee, Eun Sang Choi, Joerg Neuefeind, Haidong Zhou, and Maik Lang The structure and magnetic properties of orthorhombic D y 2 Ti O 5 have been investigated using x-ray diffraction, neutron diffraction, and alternating current (ac)/direct current (dc) magnetic susceptibility measurements. We report a continuous structural distortion below 100 K characterized by negative… [Phys. Rev. B 94, 024413] Published Tue Jul 12, 2016

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V. Soltwisch, A. Haase, J. Wernecke, J. Probst, M. Schoengen, S. Burger, M. Krumrey, and F. Scholze

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-14

Beschreibung: Author(s): V. Soltwisch, A. Haase, J. Wernecke, J. Probst, M. Schoengen, S. Burger, M. Krumrey, and F. Scholze Laterally periodic nanostructures were investigated with grazing incidence small angle x-ray scattering. To support an improved reconstruction of nanostructured surface geometries, we investigated the origin of the contributions to the diffuse scattering pattern which is correlated to the surface ro… [Phys. Rev. B 94, 035419] Published Wed Jul 13, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Origin of Fermi-level pinning and its control on the n-type Ge(100) surface (2016)

Mikhail Kuzmin, Pekka Laukkanen, Jaakko Mäkelä, Marjukka Tuominen, Muhammad Yasir, Johnny Dahl, Marko P. J. Punkkinen, and Kalevi Kokko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): Mikhail Kuzmin, Pekka Laukkanen, Jaakko Mäkelä, Marjukka Tuominen, Muhammad Yasir, Johnny Dahl, Marko P. J. Punkkinen, and Kalevi Kokko Strong Fermi-level pinning (FLP) near the valence-band maximum on n -type Ge surfaces has been a long-standing challenge in semiconductor physics, and the nature of this phenomenon has been heavily debated for years. Here, we report a systematic synchrotron-based photoemission study of atomically wel… [Phys. Rev. B 94, 035421] Published Thu Jul 14, 2016

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X-ray natural birefringence in reflection from graphene (2016)

C. Jansing, H.-Ch. Mertins, M. Gilbert, H. Wahab, H. Timmers, S.-H. Choi, A. Gaupp, M. Krivenkov, A. Varykhalov, O. Rader, D. Legut, and P. M. Oppeneer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-15

Beschreibung: Author(s): C. Jansing, H.-Ch. Mertins, M. Gilbert, H. Wahab, H. Timmers, S.-H. Choi, A. Gaupp, M. Krivenkov, A. Varykhalov, O. Rader, D. Legut, and P. M. Oppeneer The existence of natural birefringence in x-ray reflection on graphene is demonstrated at energies spanning the carbon 1 s absorption edge. This new x-ray effect has been discovered with precision measurements of the polarization-plane rotation and the polarization-ellipticity changes that occur upon… [Phys. Rev. B 94, 045422] Published Thu Jul 14, 2016

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Four allotropes of semiconducting layered arsenic that switch into a topological insulator via an electric field: Computational study (2016)

Sougata Mardanya, Vinay Kumar Thakur, Somnath Bhowmick, and Amit Agarwal

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-16

Beschreibung: Author(s): Sougata Mardanya, Vinay Kumar Thakur, Somnath Bhowmick, and Amit Agarwal We propose four different thermodynamically stable structural phases of arsenic monolayers based on ab initio density functional theory calculations, all of which undergo a topological phase transition on application of a perpendicular electric field. All four arsenic monolayer allotropes have a wid… [Phys. Rev. B 94, 035423] Published Fri Jul 15, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Thema: Physik

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Electrical control of the sign of the g factor in a GaAs hole quantum point contact (2016)

A. Srinivasan, K. L. Hudson, D. Miserev, L. A. Yeoh, O. Klochan, K. Muraki, Y. Hirayama, O. P. Sushkov, and A. R. Hamilton

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): A. Srinivasan, K. L. Hudson, D. Miserev, L. A. Yeoh, O. Klochan, K. Muraki, Y. Hirayama, O. P. Sushkov, and A. R. Hamilton Zeeman splitting of one-dimensional hole subbands is investigated in quantum point contacts fabricated on a (311)-oriented GaAs-AlGaAs heterostructure. Transport measurements can determine the magnitude of the g factor, but cannot usually determine the sign. Here we use a combination of tilted field… [Phys. Rev. B 94, 041406(R)] Published Mon Jul 18, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Decoherence of high-energy electrons in weakly disordered quantum Hall edge states (2016)

Simon E. Nigg and Anders Mathias Lunde

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Simon E. Nigg and Anders Mathias Lunde We investigate theoretically the phase coherence of electron transport in edge states of the integer quantum Hall effect at filling factor ν = 2 , in the presence of disorder and inter edge state Coulomb interaction. Within a Fokker-Planck approach, we calculate analytically the visibility of the Aharo… [Phys. Rev. B 94, 041407(R)] Published Mon Jul 18, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Charge transfer and negative curvature energy in magnesium boride nanotubes (2016)

Hui Tang and Sohrab Ismail-Beigi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-19

Beschreibung: Author(s): Hui Tang and Sohrab Ismail-Beigi Using first-principles calculations based on density functional theory, we study the energetics and charge transfer effects in MgB x nanotubes and two-dimensional (2D) sheets. The behavior of adsorbed Mg on 2D boron sheets is found to depend on the amount of electron transfer between the two subsyste… [Phys. Rev. B 94, 035425] Published Mon Jul 18, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Shot noise in the edge states of two-dimensional topological insulators (2016)

P. P. Aseev and K. E. Nagaev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): P. P. Aseev and K. E. Nagaev We calculate the resistance and shot noise in the edge states of a two-dimensional topological insulator that result from the exchange of electrons between these states and conducting puddles in the bulk of the insulator. The two limiting cases where the energy relaxation is either absent or very st… [Phys. Rev. B 94, 045425] Published Tue Jul 19, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Generalized nonequilibrium vertex correction method in coherent medium theory for quantum transport simulation of disordered nanoelectronics (2016)

Jiawei Yan and Youqi Ke

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-20

Beschreibung: Author(s): Jiawei Yan and Youqi Ke Electron transport properties of nanoelectronics can be significantly influenced by the inevitable and randomly distributed impurities/defects. For theoretical simulation of disordered nanoscale electronics, one is interested in both the configurationally averaged transport property and its statisti… [Phys. Rev. B 94, 045424] Published Tue Jul 19, 2016

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

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Short-range magnetic correlations and spin dynamics in the paramagnetic regime of (Mn,Fe)_{2} (P,Si) (2016)

X. F. Miao, L. Caron, J. Cedervall, P. C. M. Gubbens, P. Dalmas de Réotier, A. Yaouanc, F. Qian, A. R. Wildes, H. Luetkens, A. Amato, N. H. van Dijk, and E. Brück

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): X. F. Miao, L. Caron, J. Cedervall, P. C. M. Gubbens, P. Dalmas de Réotier, A. Yaouanc, F. Qian, A. R. Wildes, H. Luetkens, A. Amato, N. H. van Dijk, and E. Brück The spatial and temporal correlations of magnetic moments in the paramagnetic regime of ( Mn , Fe ) 2 ( P , Si ) have been investigated by means of polarized neutron diffraction and muon-spin relaxation techniques. Short-range magnetic correlations are present at temperatures far above the ferromagnetic trans… [Phys. Rev. B 94, 014426] Published Wed Jul 20, 2016

Schlagwort(e): Magnetism

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Spin Seebeck effect through antiferromagnetic NiO (2016)

Arati Prakash, Jack Brangham, Fengyuan Yang, and Joseph P. Heremans

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Arati Prakash, Jack Brangham, Fengyuan Yang, and Joseph P. Heremans We report temperature-dependent spin Seebeck measurements on Pt/YIG bilayers and Pt/NiO/YIG trilayers, where YIG (yttrium iron garnet, Y 3 F e 5 O 12 ) is an insulating ferrimagnet and NiO is an antiferromagnet at low temperatures. The thickness of the NiO layer is varied from 0 to 10 nm. In the Pt/YIG bil… [Phys. Rev. B 94, 014427] Published Wed Jul 20, 2016

Schlagwort(e): Magnetism

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Characteristic dynamic modes and domain-wall motion in magnetic nanotubes excited by resonant rotating magnetic fields (2016)

Jaehak Yang, Junhoe Kim, Bosung Kim, Young-Jun Cho, Jae-Hyeok Lee, and Sang-Koog Kim

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-21

Beschreibung: Author(s): Jaehak Yang, Junhoe Kim, Bosung Kim, Young-Jun Cho, Jae-Hyeok Lee, and Sang-Koog Kim We performed micromagnetic numerical calculations to explore a cylindrical nanotube's magnetization dynamics and domain-wall (DW) motions driven by eigen-circular-rotating magnetic fields of different frequencies. We discovered the presence of two different localized DW oscillations as well as asymm… [Phys. Rev. B 94, 024425] Published Wed Jul 20, 2016

Schlagwort(e): Magnetism

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