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Band alignment in LaAlO_{3}/SrTiO_{3} oxide heterostructures inferred from hard x-ray photoelectron spectroscopy (2013)

G. Berner, A. Müller, F. Pfaff, J. Walde, C. Richter, J. Mannhart, S. Thiess, A. Gloskovskii, W. Drube, M. Sing, and R. Claessen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): G. Berner, A. Müller, F. Pfaff, J. Walde, C. Richter, J. Mannhart, S. Thiess, A. Gloskovskii, W. Drube, M. Sing, and R. Claessen We present a detailed study of the electronic structure and band alignment in LaAlO 3 /SrTiO 3 oxide heterostructures by hard x-ray photoelectron spectroscopy. Our spectroscopic measurements find no evidence for the strong potential gradient within the polar LaAlO 3 film predicted by band theory. Due to... [Phys. Rev. B 88, 115111] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Quantum Hall effect in monolayer-bilayer graphene planar junctions (2013)

Jifa Tian, Yongjin Jiang, Isaac Childres, Helin Cao, Jiangping Hu, and Yong P. Chen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): Jifa Tian, Yongjin Jiang, Isaac Childres, Helin Cao, Jiangping Hu, and Yong P. Chen The Hall resistance of a homogeneous electron system is well known to be antisymmetric with respect to the magnetic field and the sign of charge carriers. We have observed that such symmetries no longer hold in planar hybrid structures consisting of partly single layer graphene (SLG) and partly bila... [Phys. Rev. B 88, 125410] Published Fri Sep 06, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Robustness in projected entangled pair states (2013)

J. Ignacio Cirac, Spyridon Michalakis, David Pérez-García, and Norbert Schuch

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): J. Ignacio Cirac, Spyridon Michalakis, David Pérez-García, and Norbert Schuch We analyze a criterion which guarantees that the ground states of certain many-body systems are stable under perturbations. Specifically, we consider PEPS, which are believed to provide an efficient description, based on local tensors, for the low energy physics arising from local interactions. In o... [Phys. Rev. B 88, 115108] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Localized states in the Mott insulator κ-(BEDT–TTF)_{2}Cu[N(CN)_{2}]Cl as probed by photoluminescence (2013)

N. Drichko, R. Hackl, and J. Schlueter

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): N. Drichko, R. Hackl, and J. Schlueter We compare the photoluminescence spectra of the low-temperature Mott insulator κ -(BEDT–TTF) 2 Cu[N(CN) 2 ]Cl ( T MIT =40 K) with spectra of metallic κ -(BEDT–TTF) 2 Cu[N(CN) 2 ]Br, which is superconducting below T c =11.8 K, in the temperature range between 300 and 20 K. In the Mott insulating state of κ -(BEDT–TT... [Phys. Rev. B 88, 115109] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Photonic crystal carpet: Manipulating wave fronts in the near field at 1.55 μm (2013)

G. Scherrer, M. Hofman, W. Śmigaj, M. Kadic, T.-M. Chang, X. Mélique, D. Lippens, O. Vanbésien, B. Cluzel, F. de Fornel, S. Guenneau, and B. Gralak

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): G. Scherrer, M. Hofman, W. Śmigaj, M. Kadic, T.-M. Chang, X. Mélique, D. Lippens, O. Vanbésien, B. Cluzel, F. de Fornel, S. Guenneau, and B. Gralak Ground-plane cloaks, which transform a curved mirror into a flat one, and recently reported at wavelengths ranging from the optical to the visible spectrum, bring the realm of optical illusion a step closer to reality. However, all carpet-cloaking experiments have thus far been carried out in the fa... [Phys. Rev. B 88, 115110] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Zeeman coupling and screening corrections to skyrmion excitations in graphene (2013)

Wenchen Luo and R. Côté

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): Wenchen Luo and R. Côté At half-filling of the fourfold degenerate Landau levels | n |≥1 in graphene, the ground states are spin-polarized quantum Hall states that support spin skyrmion excitations for | n |=1,2,3. Working in the Hartree-Fock approximation, we compute the excitation energy of an unbound spin skyrmion-antiskyrm... [Phys. Rev. B 88, 115417] Published Wed Sep 11, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Flexural mode of graphene on a substrate (2013)

Bruno Amorim and Francisco Guinea

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): Bruno Amorim and Francisco Guinea Out of plane vibrations are suppressed in graphene layers placed on a substrate. These vibrations, in suspended samples, are relevant for the understanding of properties such as the electrical resistivity, the thermal expansion coefficient, and others. We use a general framework to study the propert... [Phys. Rev. B 88, 115418] Published Wed Sep 11, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Mode conversion and long-lived vibrational modes in lead monolayers on silicon (111) after femtosecond laser excitation: A molecular dynamics simulation (2013)

Sung Sakong, Peter Kratzer, Simone Wall, Annika Kalus, and Michael Horn-von Hoegen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): Sung Sakong, Peter Kratzer, Simone Wall, Annika Kalus, and Michael Horn-von Hoegen The dynamics of vibrations localized in a monolayer of Pb on Si(111) is studied using density functional theory and molecular dynamics methods. Recently, a pump-probe experiment has given direct access to the relaxation dynamics of the vibrational excitations in Pb, revealing two distinct time scale... [Phys. Rev. B 88, 115419] Published Wed Sep 11, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Pressure-driven Fermi surface reconstruction of chromium (2013)

R. L. Stillwell, D. E. Graf, W. A. Coniglio, T. P. Murphy, E. C. Palm, J. H. Park, D. Van; Gennep, P. Schlottmann, and S. W. Tozer

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): R. L. Stillwell, D. E. Graf, W. A. Coniglio, T. P. Murphy, E. C. Palm, J. H. Park, D. VanGennep, P. Schlottmann, and S. W. Tozer We have observed a massive reconstruction of the Fermi surface of single crystal chromium as a function of high pressure and high magnetic fields caused by the spin-flip transition, with multiple new orbits appearing above 0.93 GPa. In addition, some orbits have field-induced effective masses of ∼0.... [Phys. Rev. B 88, 125119] Published Wed Sep 11, 2013

Keywords: Electronic structure and strongly correlated systems

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Electronic structure of Ca_{10}(Pt_{4}As_{8})(Fe_{2−x}Pt_{x}As_{2})_{5} with metallic Pt_{4}As_{8} layers: An angle-resolved photoemission spectroscopy study (2013)

X. P. Shen, S. D. Chen, Q. Q. Ge, Z. R. Ye, F. Chen, H. C. Xu, S. Y. Tan, X. H. Niu, Q. Fan, B. P. Xie, and D. L. Feng

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-14

Description: Author(s): X. P. Shen, S. D. Chen, Q. Q. Ge, Z. R. Ye, F. Chen, H. C. Xu, S. Y. Tan, X. H. Niu, Q. Fan, B. P. Xie, and D. L. Feng We studied the low-lying electronic structure of the newly discovered iron-platinum-arsenide superconductor, Ca 10 (Pt 4 As 8 )(Fe 2− x Pt x As 2 ) 5 ( T c =22 K) with angle-resolved photoemission spectroscopy. We found that the Pt 4 As 8 layer contributes to a small electronlike Fermi surface, indicative of metallic c... [Phys. Rev. B 88, 115124] Published Fri Sep 13, 2013

Keywords: Electronic structure and strongly correlated systems

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Ab initio calculations of the Hubbard U for the early lanthanides using the constrained random-phase approximation (2013)

F. Nilsson, R. Sakuma, and F. Aryasetiawan

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-14

Description: Author(s): F. Nilsson, R. Sakuma, and F. Aryasetiawan In this work we have calculated U from first principles for the early lanthanides (Ce-Gd) using the constrained random phase approximation (cRPA). We compare the static limit of U with experimental estimations from x-ray photoemission spectroscopy (XPS) and bremsstrahlung isochromat spectroscopy (BI... [Phys. Rev. B 88, 125123] Published Fri Sep 13, 2013

Keywords: Electronic structure and strongly correlated systems

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Dielectric screening and plasmons in AA-stacked bilayer graphene (2013)

Rafael Roldán and Luis Brey

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-14

Description: Author(s): Rafael Roldán and Luis Brey The screening properties and collective excitations (plasmons) in AA-stacked bilayer graphene are studied within the random phase approximation. Whereas long-lived plasmons in single-layer graphene and in AB-stacked bilayer graphene can exist only in doped samples, we find that coherent plasmons can... [Phys. Rev. B 88, 115420] Published Fri Sep 13, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Combined effect of strain and defects on the conductance of graphene nanoribbons (2013)

Thomas Lehmann, Dmitry A. Ryndyk, and Gianaurelio Cuniberti

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Thomas Lehmann, Dmitry A. Ryndyk, and Gianaurelio Cuniberti We investigate the combined influence of structural defects and uniaxial longitudinal strain on the electronic transport properties of armchair graphene nanoribbons using the numerical approach based on the semiempirical tight-binding model, the Landauer formalism, and the recursion method for Green... [Phys. Rev. B 88, 125420] Published Mon Sep 16, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Bulk-boundary correspondence for chiral symmetric quantum walks (2013)

János K. Asbóth and Hideaki Obuse

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-18

Description: Author(s): János K. Asbóth and Hideaki Obuse Discrete-time quantum walks (DTQW) have topological phases that are richer than those of time-independent lattice Hamiltonians. Even the basic symmetries, on which the standard classification of topological insulators hinges, have not yet been properly defined for quantum walks. We introduce the key... [Phys. Rev. B 88, 121406] Published Tue Sep 17, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Nanoscopic interferometer model for spin resonance in current noise (2013)

Anatoly Golub and Baruch Horovitz

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-18

Description: Author(s): Anatoly Golub and Baruch Horovitz We study a model for the observed phenomenon of electron spin resonance (ESR) at the Zeeman frequency as seen by a scanning tunneling microscope (STM) via its current noise. The model for this ESR-STM phenomenon allows the STM current to flow in two arms of a nanoscopic interferometer, one arm has d... [Phys. Rev. B 88, 115423] Published Tue Sep 17, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Size consistency of tensor network methods for quantum many-body systems (2013)

Zhen Wang, Yongjian Han, Guang-Can Guo, and Lixin He

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-18

Description: Author(s): Zhen Wang, Yongjian Han, Guang-Can Guo, and Lixin He Recently developed tensor network methods demonstrate great potential for addressing the quantum many-body problem, by constructing variational spaces with polynomially, instead of exponentially, scaled parameters. Constructing such an efficient tensor network, and thus the variational space, is a s... [Phys. Rev. B 88, 121105] Published Tue Sep 17, 2013

Keywords: Electronic structure and strongly correlated systems

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Fine structure of light-hole excitons in nanowire quantum dots (2013)

M. Zieliński

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-19

Description: Author(s): M. Zieliński Quantum dots with light-hole ground states could find numerous applications including faster quantum bit operations or coherent conversion of photons into electron spins. Typically, however, holes confined in epitaxial quantum dots are of heavy-hole character. I show, by use of atomistic tight-bindi... [Phys. Rev. B 88, 115424] Published Wed Sep 18, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Eigenfrequencies of the randomly pinned drum and conductivity of graphene (2013)

M. V. Medvedyeva and Ya. M. Blanter

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-19

Description: Author(s): M. V. Medvedyeva and Ya. M. Blanter Graphene is a convenient material for nanomechanical applications since high-frequency oscillations are easily accessible. In this article, we consider graphene on a rough substrate attached to imperfections at random locations. We explore the statistics of low-lying phonon modes, which exert most i... [Phys. Rev. B 88, 125423] Published Wed Sep 18, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Effective fluctuation theorems for electron transport in a double quantum dot coupled to a quantum point contact (2013)

Gregory Bulnes Cuetara, Massimiliano Esposito, Gernot Schaller, and Pierre Gaspard

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-20

Description: Author(s): Gregory Bulnes Cuetara, Massimiliano Esposito, Gernot Schaller, and Pierre Gaspard A theoretical study is reported of electron transport at finite temperature in a double quantum dot (DQD) capacitively coupled to a quantum point contact (QPC) for the measurement of the DQD charge state. Starting from a Hamiltonian model, a master equation is obtained for the stochastic process tak... [Phys. Rev. B 88, 115134] Published Thu Sep 19, 2013

Keywords: Electronic structure and strongly correlated systems

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Coordination-driven magnetic-to-nonmagnetic transition in manganese-doped silicon clusters (2013)

V. Zamudio-Bayer, L. Leppert, K. Hirsch, A. Langenberg, J. Rittmann, M. Kossick, M. Vogel, R. Richter, A. Terasaki, T. Möller, B. v. Issendorff, S. Kümmel, and J. T. Lau

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-20

Description: Author(s): V. Zamudio-Bayer, L. Leppert, K. Hirsch, A. Langenberg, J. Rittmann, M. Kossick, M. Vogel, R. Richter, A. Terasaki, T. Möller, B. v. Issendorff, S. Kümmel, and J. T. Lau The interaction of a single manganese impurity with silicon is analyzed in a combined experimental and theoretical study of the electronic, magnetic, and structural properties of manganese-doped silicon clusters. The structural transition from exohedral to endohedral doping coincides with 3 d electro... [Phys. Rev. B 88, 115425] Published Thu Sep 19, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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GW calculation of plasmon excitations in the quasi-one-dimensional organic compound (TMTSF)_{2}PF_{6} (2013)

Kazuma Nakamura, Shiro Sakai, Ryotaro Arita, and Kazuhiko Kuroki

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-20

Description: Author(s): Kazuma Nakamura, Shiro Sakai, Ryotaro Arita, and Kazuhiko Kuroki We present an ab initio G W calculation to study dynamical effects on an organic compound (TMTSF) 2 PF 6 . Calculated polarized reflectivities reproduce experimental plasma edges at around 0.2 eV for E ∥ b ′ and 1.0 eV for E ∥ a . The low-energy plasmons come out from the low-energy narrow bands energetically ... [Phys. Rev. B 88, 125128] Published Thu Sep 19, 2013

Keywords: Electronic structure and strongly correlated systems

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Electronic structure of graphene on a reconstructed Pt(100) surface: Hydrogen adsorption, doping, and band gaps (2013)

Søren Ulstrup, Louis Nilsson, Jill A. Miwa, Richard Balog, Marco Bianchi, Liv Hornekær, and Philip Hofmann

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-20

Description: Author(s): Søren Ulstrup, Louis Nilsson, Jill A. Miwa, Richard Balog, Marco Bianchi, Liv Hornekær, and Philip Hofmann We probe the structure and electronic band structure of graphene grown on a Pt(100) substrate using scanning tunneling microscopy, low energy electron diffraction, and angle-resolved photoemission spectroscopy. It is found that the graphene layer lacks a well-defined azimuthal orientation with respe... [Phys. Rev. B 88, 125425] Published Thu Sep 19, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Periodic Landau gauge and quantum Hall effect in twisted bilayer graphene (2013)

Yasumasa Hasegawa and Mahito Kohmoto

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-21

Description: Author(s): Yasumasa Hasegawa and Mahito Kohmoto Energy versus magnetic field (Hofstadter butterfly diagram) in twisted bilayer graphene is studied theoretically. If we take the usual Landau gauge, we cannot take a finite periodicity even when the magnetic flux through a supercell is a rational number. We show that the periodic Landau gauge, which... [Phys. Rev. B 88, 125426] Published Fri Sep 20, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Strong magnetoelectric coupling in multiferroic Co/BaTiO_{3} thin films (2013)

N. Jedrecy, H. J. von Bardeleben, V. Badjeck, D. Demaille, D. Stanescu, H. Magnan, and A. Barbier

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-24

Description: Author(s): N. Jedrecy, H. J. von Bardeleben, V. Badjeck, D. Demaille, D. Stanescu, H. Magnan, and A. Barbier We have found evidence for a strong magnetoelectric (ME) coupling at room temperature between polycrystalline Co layers (5−40 nm) and single-crystalline (001)-oriented BaTiO 3 layers (15−17 nm). We took advantage of the quasi-single polarization orientation, perpendicular to the film plane, of the fe... [Phys. Rev. B 88, 121409] Published Mon Sep 23, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Topological entanglement entropy in Gutzwiller projected spin liquids (2013)

Jiquan Pei, Steve Han, Haijun Liao, and Tao Li

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-26

Description: Author(s): Jiquan Pei, Steve Han, Haijun Liao, and Tao Li The topological entanglement entropy (TEE) of Gutzwiller projected RVB state is studied with Monte Carlo simulation. With tricks to speed up the convergence of TEE, we are able to show that the spin liquid state studied in Zhang et al. [ Phys. Rev. B 84 075128 (2011) ] actually does not support Z 2 t... [Phys. Rev. B 88, 125135] Published Wed Sep 25, 2013

Keywords: Electronic structure and strongly correlated systems

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Strain stabilization and thickness dependence of magnetism in epitaxial transition metal monosilicide thin films on Si(111) (2013)

Benjamin Geisler and Peter Kratzer

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-27

Description: Author(s): Benjamin Geisler and Peter Kratzer We present a comprehensive study of different 3 d transition metal monosilicides in their ground state crystal structure (B20), ranging from equilibrium bulk over biaxially strained bulk to epitaxial thin films on Si(111), by means of density functional theory. The magnetic properties of MnSi and FeS... [Phys. Rev. B 88, 115433] Published Thu Sep 26, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Effect of edge reconstruction and electron-electron interactions on quantum transport in graphene nanoribbons (2013)

S. Ihnatsenka and G. Kirczenow

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-27

Description: Author(s): S. Ihnatsenka and G. Kirczenow We present numerical studies of conduction in graphene nanoribbons with reconstructed edges based on the standard tight-binding model of the graphene and the extended Hückel model of the reconstructed defects. We performed atomic geometry relaxation of individual defects using density functional the... [Phys. Rev. B 88, 125430] Published Thu Sep 26, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Electron delocalization in gate-tunable gapless silicene (2013)

Yan-Yang Zhang, Wei-Feng Tsai, Kai Chang, X.-T. An, G.-P. Zhang, X.-C. Xie, and Shu-Shen Li

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-27

Description: Author(s): Yan-Yang Zhang, Wei-Feng Tsai, Kai Chang, X.-T. An, G.-P. Zhang, X.-C. Xie, and Shu-Shen Li The application of a perpendicular electric field can drive silicene into a gapless state, characterized by two nearly fully spin-polarized Dirac cones owing to both relatively large spin-orbital interactions and inversion symmetry breaking. Here we argue that since intervalley scattering from nonma... [Phys. Rev. B 88, 125431] Published Thu Sep 26, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Luttinger parameters of interacting fermions in one dimension at high energies (2013)

O. Tsyplyatyev and A. J. Schofield

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-27

Description: Author(s): O. Tsyplyatyev and A. J. Schofield Interactions between electrons in one dimension are fully described at low energies by only a few parameters of the Tomonaga-Luttinger model, which is based on linearization of the spectrum. We consider a model of spinless fermions with short-range interaction via the Bethe-Ansatz technique and show... [Phys. Rev. B 88, 115142] Published Thu Sep 26, 2013

Keywords: Electronic structure and strongly correlated systems

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Bonding, stability, and electronic properties of the BC_{3} honeycomb monolayer structure on NbB_{2}(0001) (2013)

Shi-Yu Liu, Shiyang Liu, De-Jun Li, Hongli Dang, Yingdi Liu, Sha Xue, Wenhua Xue, and Sanwu Wang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-27

Description: Author(s): Shi-Yu Liu, Shiyang Liu, De-Jun Li, Hongli Dang, Yingdi Liu, Sha Xue, Wenhua Xue, and Sanwu Wang Two-dimensional graphenelike BC 3 honeycomb structures, which have been grown on the NbB 2 (0001) surface, possess intriguing properties that offer new opportunities for applications in nanoelectronics, mechanical materials, and superconductivity. The bonding configuration of BC 3 on the substrate has n... [Phys. Rev. B 88, 115434] Published Thu Sep 26, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Growth of Si ultrathin films on silver surfaces: Evidence of an Ag(110) reconstruction induced by Si (2013)

Romain Bernard, Thomas Leoni, Axel Wilson, Tony Lelaidier, Houda Sahaf, Eric Moyen, Loïc Assaud, Lionel Santinacci, Frédéric Leroy, Fabien Cheynis, Alain Ranguis, Haik Jamgotchian, Conrad Becker, Yves Borensztein, Margrit Hanbücken, Geoffroy Prévot, and Laurence Masson

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-27

Description: Author(s): Romain Bernard, Thomas Leoni, Axel Wilson, Tony Lelaidier, Houda Sahaf, Eric Moyen, Loïc Assaud, Lionel Santinacci, Frédéric Leroy, Fabien Cheynis, Alain Ranguis, Haik Jamgotchian, Conrad Becker, Yves Borensztein, Margrit Hanbücken, Geoffroy Prévot, and Laurence Masson We report here in situ measurements of the evolution of the Ag(110) surface during Si growth, using scanning tunneling microscopy and grazing incidence x-ray diffraction. We provide compelling evidence of an Ag(110) surface reconstruction associated with the release of Ag atoms induced by the growth... [Phys. Rev. B 88, 121411] Published Thu Sep 26, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Field theory of the quantum Hall nematic transition (2013)

J. Maciejko, B. Hsu, S. A. Kivelson, Ye; Je Park, and S. L. Sondhi

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): J. Maciejko, B. Hsu, S. A. Kivelson, YeJe Park, and S. L. Sondhi The topological physics of quantum Hall states is efficiently encoded in purely topological quantum field theories of the Chern-Simons type. The reliable inclusion of low-energy dynamical properties in a continuum description, however, typically requires proximity to a quantum critical point. We con... [Phys. Rev. B 88, 125137] Published Fri Sep 27, 2013

Keywords: Electronic structure and strongly correlated systems

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Homogenization limit in a graded photonic crystal (2013)

Eric Cassan, Jean Dellinger, Xavier Le Roux, K. Van Do, Frédérique de Fornel, and Benoît Cluzel

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): Eric Cassan, Jean Dellinger, Xavier Le Roux, K. Van Do, Frédérique de Fornel, and Benoît Cluzel The transition between the long-wavelength and the short-wavelength regimes of light propagation in two-dimensional graded photonic crystal is investigated using a hyperspectral near-field scanning microscope. The experiments show an invariant quantity of only 1.78 times the lattice period as the cr... [Phys. Rev. B 88, 125138] Published Fri Sep 27, 2013

Keywords: Electronic structure and strongly correlated systems

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Transport of spin anisotropy without spin currents (2013)

Michael Hell, Sourin Das, and Maarten R. Wegewijs

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): Michael Hell, Sourin Das, and Maarten R. Wegewijs We revisit the transport of spin-degrees of freedom across an electrically and thermally biased tunnel junction between two ferromagnets with noncollinear magnetizations. Besides the well-known charge current and spin current we show that a nonzero spin-quadrupole current flows between the ferromagn... [Phys. Rev. B 88, 115435] Published Fri Sep 27, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Phase diagram structure of topological Mott transition for zero-gap semiconductors beyond conventional Landau-Ginzburg-Wilson scenario (2013)

Moyuru Kurita, Youhei Yamaji, and Masatoshi Imada

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): Moyuru Kurita, Youhei Yamaji, and Masatoshi Imada We show that a wide class of unconventional quantum criticality emerges when orbital currents cause quantum phase transitions from zero-gap semiconductors such as Dirac fermions to a topological insulator or a Chern insulator. Changes in Fermi-surface topology concomitant with [SU(2) or time-reversa... [Phys. Rev. B 88, 115143] Published Fri Sep 27, 2013

Keywords: Electronic structure and strongly correlated systems

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Dissipative phase transition in a pair of coupled noisy two-level systems (2013)

Julius Bonart

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): Julius Bonart We study the renormalization group (RG) equations of a pair of spin-boson systems coupled in the z direction with each other. Each spin is coupled to a different bath of harmonic oscillators. We introduce a systematic adiabatic RG, which generalizes the first-order adiabatic renormalization previous... [Phys. Rev. B 88, 125139] Published Fri Sep 27, 2013

Keywords: Electronic structure and strongly correlated systems

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Probing the generalized magicity of Ag nanoclusters constructed on Si(111) by atomic manipulation (2013)

Fangfei Ming, Guohua Zhong, Qin Liu, Kedong Wang, Zhenyu Zhang, and Xudong Xiao

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): Fangfei Ming, Guohua Zhong, Qin Liu, Kedong Wang, Zhenyu Zhang, and Xudong Xiao Using scanning tunneling microscopy supplemented with first-principles calculations, we examine all the thermally activated atomistic processes of Ag n ( n = 1–26) constructed atom-by-atom on a Si(111)-(7×7) substrate, and we exploit such cluster dynamical information to further determine the energeti... [Phys. Rev. B 88, 125432] Published Fri Sep 27, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Magnetic and Kohn-Luttinger instabilities near a Van Hove singularity: Monolayer versus twisted bilayer graphene (2013)

J. González

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): J. González We investigate the many-body instabilities of electrons interacting near Van Hove singularities arising in monolayer and twisted bilayer graphene. We show that a pairing instability must be dominant over the tendency to magnetic order as the Fermi level is tuned to the Van Hove singularity in the co... [Phys. Rev. B 88, 125434] Published Fri Sep 27, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Moiré beatings in graphene on Ru(0001) (2013)

Marcella Iannuzzi, Irakli Kalichava, Haifeng Ma, Steven J. Leake, Haitao Zhou, Geng Li, Yi Zhang, Oliver Bunk, Hongjun Gao, Jürg Hutter, Philip R. Willmott, and Thomas Greber

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-28

Description: Author(s): Marcella Iannuzzi, Irakli Kalichava, Haifeng Ma, Steven J. Leake, Haitao Zhou, Geng Li, Yi Zhang, Oliver Bunk, Hongjun Gao, Jürg Hutter, Philip R. Willmott, and Thomas Greber The moiré superstructure of a single layer of carbon on ruthenium, where 25×25 graphene honeycombs sit on 23×23 substrate unit cells, is determined from first principles. The density functional theory (DFT) calculations predict two kinds of structural units, Ω and Y , in the supercell, which are iden... [Phys. Rev. B 88, 125433] Published Fri Sep 27, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Tunable omnidirectional strong light-matter interactions mediated by graphene surface plasmons (2013)

Feng Liu and Ertugrul Cubukcu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Feng Liu and Ertugrul Cubukcu In this theoretical work, we report on voltage-controllable hybridization of electromagnetic modes arising from strong interaction between graphene surface plasmons and molecular vibrations. The interaction strength depends strongly on the volume density of molecular dipoles, the molecular relaxatio... [Phys. Rev. B 88, 115439] Published Mon Sep 30, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Tight-binding couplings in microwave artificial graphene (2013)

Matthieu Bellec, Ulrich Kuhl, Gilles Montambaux, and Fabrice Mortessagne

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Matthieu Bellec, Ulrich Kuhl, Gilles Montambaux, and Fabrice Mortessagne We experimentally study the propagation of microwaves in an artificial honeycomb lattice made of dielectric resonators. This evanescent propagation is well described by a tight-binding model, very much like the propagation of electrons in graphene. We measure the density of states, as well as the wa... [Phys. Rev. B 88, 115437] Published Mon Sep 30, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Dipole-induced localized plasmon modes and resonant surface plasmon scattering (2013)

E. G. Mishchenko

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): E. G. Mishchenko A metal film supports the continuum of propagating surface plasmon waves. The interaction of these waves with a dipole (nanoparticle) positioned some distance from the surface of the film can produce well-defined localized plasmon modes whose frequency nonetheless resides inside the continuum. This ... [Phys. Rev. B 88, 115436] Published Mon Sep 30, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Global symmetries in tensor network states: Symmetric tensors versus minimal bond dimension (2013)

Sukhwinder Singh and Guifre Vidal

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Sukhwinder Singh and Guifre Vidal Tensor networks offer a variational formalism to efficiently represent wave functions of extended quantum many-body systems on a lattice. In a tensor network N , the dimension χ of the bond indices that connect its tensors controls the number of variational parameters and associated computational cos... [Phys. Rev. B 88, 115147] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Anomalous supercurrent from Majorana states in topological insulator Josephson junctions (2013)

Andrew C. Potter and Liang Fu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Andrew C. Potter and Liang Fu We propose a Josephson junction setup based on a topological insulator (TI) thin film to detect Majorana states that exploits the unique helical and extended nature of the TI surface state. When the magnetic flux through the junction is close to an integer number of flux quanta, Majorana states, pre... [Phys. Rev. B 88, 121109] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Theory of quasiparticle interference in mirror-symmetric two-dimensional systems and its application to surface states of topological crystalline insulators (2013)

Chen Fang, Matthew J. Gilbert, Su-Yang Xu, B. Andrei Bernevig, and M. Zahid Hasan

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Chen Fang, Matthew J. Gilbert, Su-Yang Xu, B. Andrei Bernevig, and M. Zahid Hasan We study symmetry-protected features in the quasiparticle interference (QPI) pattern of two-dimensional (2D) systems with mirror symmetries and time-reversal symmetry, around a single static point impurity. We show that, in the Fourier-transformed local density of states (FT-LDOS) ρ ( q , ω ), while the ... [Phys. Rev. B 88, 125141] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Suppression of the Kondo resistivity minimum in topological insulators (2013)

Jie Wang and Dimitrie Culcer

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Jie Wang and Dimitrie Culcer Magnetically doped topological insulators are studied intensively in the search for exotic phenomena such as the quantum anomalous Hall effect. The interplay of electronic and impurity degrees of freedom leads to the Kondo effect, which is an increase in the resistivity at temperatures T 〈 T K (the ... [Phys. Rev. B 88, 125140] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Coherence of a sliding charge-density wave stimulated by asynchronous rf irradiation (2013)

S. G. Zybtsev and V. Ya. Pokrovskii

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): S. G. Zybtsev and V. Ya. Pokrovskii We show that rf irradiation drastically increases coherence of the charge-density wave (CDW) depinning and sliding in the electric field for NbS 3 (phase II), TaS 3 , and (TaSe 4 ) 2 I. The effect is observed in the range of the CDW currents at which the fundamental frequencies are well below the frequency... [Phys. Rev. B 88, 125144] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Universal aspects in the behavior of the entanglement spectrum in one dimension: Scaling transition at the factorization point and ordered entangled structures (2013)

S. M. Giampaolo, S. Montangero, F. Dell’Anno, S. De Siena, and F. Illuminati

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): S. M. Giampaolo, S. Montangero, F. Dell’Anno, S. De Siena, and F. Illuminati We investigate the scaling of the entanglement spectrum and of the Rényi block entropies and determine its universal aspects in the ground state of critical and noncritical one-dimensional quantum spin models. In all cases, the scaling exhibits an oscillatory behavior that terminates at the factoriz... [Phys. Rev. B 88, 125142] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Spin resonance in a Luttinger liquid with spin-orbit interaction (2013)

O. A. Tretiakov, K. S. Tikhonov, and V. L. Pokrovsky

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): O. A. Tretiakov, K. S. Tikhonov, and V. L. Pokrovsky Spin-orbit interaction in quantum wires leads to a spin resonance at low temperatures, even in the absence of an external dc magnetic field. We study the effect of electron-electron interaction on the resonance. This interaction is strong in quantum wires. We show that the electron-electron interact... [Phys. Rev. B 88, 125143] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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Anisotropic Fermi contour of (001) GaAs electrons in parallel magnetic fields (2013)

D. Kamburov, M. A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, and R. Winkler

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): D. Kamburov, M. A. Mueed, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, J. J. D. Lee, and R. Winkler We demonstrate a severe Fermi contour anisotropy induced by the application of a parallel magnetic field to high-mobility electrons confined to a 30-nm-wide (001) GaAs quantum well. We study commensurability oscillations, namely, geometrical resonances of the electron orbits with a unidirectional, s... [Phys. Rev. B 88, 125435] Published Mon Sep 30, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Excitons in nitride heterostructures: From zero- to one-dimensional behavior (2013)

D. Rosales, T. Bretagnon, B. Gil, A. Kahouli, J. Brault, B. Damilano, J. Massies, M. V. Durnev, and A. V. Kavokin

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): D. Rosales, T. Bretagnon, B. Gil, A. Kahouli, J. Brault, B. Damilano, J. Massies, M. V. Durnev, and A. V. Kavokin We report an unusual temperature dependence of exciton lifetimes in arrays of GaN nanostructures grown on semipolar (11-22) oriented Al 0.5 Ga 0.5 N alloy by molecular beam epitaxy. Atomic force microscopy measurements revealed: (i) a one-dimensional ordering tendency along the [1-100] crystallographic ... [Phys. Rev. B 88, 125437] Published Mon Sep 30, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Tuning electron transport through molecular junctions by chemical modification of the molecular core: First-principles study (2013)

Shigeru Tsukamoto, Vasile Caciuc, Nicolae Atodiresei, and Stefan Blügel

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Shigeru Tsukamoto, Vasile Caciuc, Nicolae Atodiresei, and Stefan Blügel The unique versatility of the electronic structures of organic molecules can be potentially utilized to engineer single-molecular electronic devices with specific functionalities. Here, we report on how the electronic structures and the transport properties of molecular junctions containing a π -conj... [Phys. Rev. B 88, 125436] Published Mon Sep 30, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Infrared anomalous Hall effect in Ca_{x}Sr_{1−x}RuO_{3} films (2013)

M.-H. Kim, T. Tanaka, C. T. Ellis, A. Mukherjee, G. Acbas, I. Ohkubo, H. Christen, D. Mandrus, H. Kontani, and J. Cerne

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-02

Description: Author(s): M.-H. Kim, T. Tanaka, C. T. Ellis, A. Mukherjee, G. Acbas, I. Ohkubo, H. Christen, D. Mandrus, H. Kontani, and J. Cerne The midinfrared anomalous Hall effect (AHE) can provide critical new information for resolving the controversial origins of the dc AHE in Ca x Sr 1− x RuO 3 . The complex Faraday and Kerr angles, as well as the complex Hall conductivity σ x y , are measured in Ca x Sr 1− x RuO 3 films as a function of mid- and near... [Phys. Rev. B 88, 155101] Published Tue Oct 01, 2013

Keywords: Electronic structure and strongly correlated systems

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Entropy perspective on the thermal crossover in a fermionic Hubbard chain (2013)

Lars Bonnes, Hannes Pichler, and Andreas M. Läuchli

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-03

Description: Author(s): Lars Bonnes, Hannes Pichler, and Andreas M. Läuchli We study the Renyi entropy in the finite-temperature crossover regime of a Hubbard chain using quantum Monte Carlo. The ground-state entropy has characteristic features such as a logarithmic divergence with block size and 2 k F oscillations that are a hallmark of its Luttinger liquid nature. The inter... [Phys. Rev. B 88, 155103] Published Wed Oct 02, 2013

Keywords: Electronic structure and strongly correlated systems

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Spin-orbit coupled fermions in ladderlike optical lattices at half filling (2013)

G. Sun, J. Jaramillo, L. Santos, and T. Vekua

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-03

Description: Author(s): G. Sun, J. Jaramillo, L. Santos, and T. Vekua We study the ground-state phase diagram of two-component fermions loaded in a ladderlike lattice at half filling in the presence of spin-orbit coupling. For repulsive fermions with unidirectional spin-orbit coupling along the legs we identify a Néel state which is separated from rung-singlet and fer... [Phys. Rev. B 88, 165101] Published Wed Oct 02, 2013

Keywords: Electronic structure and strongly correlated systems

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Weyl fermions and the anomalous Hall effect in metallic ferromagnets (2013)

Y. Chen, D. L. Bergman, and A. A. Burkov

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): Y. Chen, D. L. Bergman, and A. A. Burkov We reconsider the problem of the anomalous Hall effect in ferromagnetic SrRuO 3 , incorporating insights from the recently developed theory of Weyl semimetals. We demonstrate that SrRuO 3 possesses a large number of Weyl nodes, separated in momentum space, in its band structure. While the nodes normall... [Phys. Rev. B 88, 125110] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Diffusing magnetic Tb impurities and magnetotransport in strongly spin-polarized Bi films (2013)

Sergii Sologub, Daniel Lükermann, Herbert Pfnür, and Christoph Tegenkamp

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): Sergii Sologub, Daniel Lükermann, Herbert Pfnür, and Christoph Tegenkamp As a contribution to electronic transport within strongly spin-polarized surface states and its modification by adsorption of magnetic impurities we studied the adsorption of Tb (atomic magnetic moment 10 μ B ) on epitaxial Bi(111) films by means of surface sensitive (magneto)conductance and low-energ... [Phys. Rev. B 88, 115412] Published Fri Sep 06, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Competing charge ordering and Mott phases in a correlated Sn/Ge(111) two-dimensional triangular lattice (2013)

R. Cortés, A. Tejeda, J. Lobo-Checa, C. Didiot, B. Kierren, D. Malterre, J. Merino, F. Flores, E. G. Michel, and A. Mascaraque

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): R. Cortés, A. Tejeda, J. Lobo-Checa, C. Didiot, B. Kierren, D. Malterre, J. Merino, F. Flores, E. G. Michel, and A. Mascaraque We take advantage of complementary high-resolution experimental techniques and theoretical tools to get insight into the α -Sn/Ge(111) triangular lattice surface consisting of sp electrons. We report a (3×3) phase, characterized by a charge ordering settled by electronic correlation, which appears be... [Phys. Rev. B 88, 125113] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Construction of a general semilocal exchange-correlation hole model: Application to nonempirical meta-GGA functionals (2013)

Lucian A. Constantin, Eduardo Fabiano, and Fabio Della Sala

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-07

Description: Author(s): Lucian A. Constantin, Eduardo Fabiano, and Fabio Della Sala Using a reverse-engineering method, we construct a meta-generalized gradient approximation (meta-GGA) angle-averaged exchange-correlation (XC) hole model which has a general applicability. It satisfies known exact hole constraints and can exactly recover the exchange-correlation energy density of an... [Phys. Rev. B 88, 125112] Published Fri Sep 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Electronic and optical gap renormalization in carbon nanotubes near a metallic surface (2013)

Catalin D. Spataru

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-10

Description: Author(s): Catalin D. Spataru Renormalization of quasiparticles and excitons in carbon nanotubes (CNTs) near a metallic surface has been studied within a many-body formalism using an embedding approach newly implemented in the GW and Bethe-Salpeter methods. The quasiparticle band-gap renormalization in semiconducting CNTs is fou... [Phys. Rev. B 88, 125412] Published Mon Sep 09, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Quasiparticle interference on the surface of the topological crystalline insulator Pb_{1−x}Sn_{x}Se (2013)

A. Gyenis, I. K. Drozdov, S. Nadj-Perge, O. B. Jeong, J. Seo, I. Pletikosić, T. Valla, G. D. Gu, and A. Yazdani

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-10

Description: Author(s): A. Gyenis, I. K. Drozdov, S. Nadj-Perge, O. B. Jeong, J. Seo, I. Pletikosić, T. Valla, G. D. Gu, and A. Yazdani Topological crystalline insulators represent a novel topological phase of matter in which the surface states are protected by discrete point group symmetries of the underlying lattice. Rock-salt lead-tin-selenide alloy is one possible realization of this phase, which undergoes a topological phase tr... [Phys. Rev. B 88, 125414] Published Mon Sep 09, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Relating the entanglement spectrum of noninteracting band insulators to their quantum geometry and topology (2013)

Markus Legner and Titus Neupert

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-10

Description: Author(s): Markus Legner and Titus Neupert We study the entanglement spectrum of noninteracting band insulators, which can be computed from the two-point correlation function, when restricted to one part of the system. In particular, we analyze a type of partitioning of the system that maintains its full translational symmetry, by tracing ov... [Phys. Rev. B 88, 115114] Published Mon Sep 09, 2013

Keywords: Electronic structure and strongly correlated systems

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Low-Q whispering gallery modes in anisotropic metamaterial shells (2013)

Ana Díaz-Rubio, Jorge Carbonell, Daniel Torrent, and José Sánchez-Dehesa

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-11

Description: Author(s): Ana Díaz-Rubio, Jorge Carbonell, Daniel Torrent, and José Sánchez-Dehesa Anisotropic and inhomogeneous metamaterial shells are studied in order to exploit all their resonant mode richness. These multilayer structures are based on a cylindrical distribution of radially dependent constitutive parameters including an inner void cavity. Shell, cavity, and whispering gallery ... [Phys. Rev. B 88, 115118] Published Tue Sep 10, 2013

Keywords: Electronic structure and strongly correlated systems

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Quantum critical metals in d=3+1 dimensions (2013)

R. Mahajan, D. M. Ramirez, S. Kachru, and S. Raghu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-11

Description: Author(s): R. Mahajan, D. M. Ramirez, S. Kachru, and S. Raghu We study the problem of disorder-free metals in the vicinity of a quantum critical point in d =3+1 dimensions. We begin with perturbation theory in the Yukawa coupling between the electrons and undamped bosons (order-parameter fluctuations) and show that the perturbation expansion breaks down below e... [Phys. Rev. B 88, 115116] Published Tue Sep 10, 2013

Keywords: Electronic structure and strongly correlated systems

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Non-Fermi-liquid fixed point in a Wilsonian theory of quantum critical metals (2013)

A. Liam Fitzpatrick, Shamit Kachru, Jared Kaplan, and S. Raghu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-11

Description: Author(s): A. Liam Fitzpatrick, Shamit Kachru, Jared Kaplan, and S. Raghu We study the problem of disorder-free metals near a continuous quantum critical point. We depart from the standard paradigm [ Hertz Phys. Rev. B 14 1165 (1976) and Millis Phys. Rev. B 48 7183 (1993) ] and treat both fermions and bosons (i.e., order parameter fields) on equal footing. We construct ... [Phys. Rev. B 88, 125116] Published Tue Sep 10, 2013

Keywords: Electronic structure and strongly correlated systems

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Quantum phases of one-dimensional Hubbard models with three- and four-body couplings (2013)

Fabrizio Dolcini and Arianna Montorsi

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-11

Description: Author(s): Fabrizio Dolcini and Arianna Montorsi The experimental advances in cold atomic and molecular gases stimulate the investigation of lattice correlated systems beyond the conventional on-site Hubbard approximation, by possibly including multiparticle processes. We study fermionic extended Hubbard models in a one-dimensional lattice with di... [Phys. Rev. B 88, 115115] Published Tue Sep 10, 2013

Keywords: Electronic structure and strongly correlated systems

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Geometrical description of fractional Chern insulators based on static structure factor calculations (2013)

E. Dobardžić, M. V. Milovanović, and N. Regnault

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-11

Description: Author(s): E. Dobardžić, M. V. Milovanović, and N. Regnault We study the static structure factor of the fractional Chern insulator Laughlin-like state and provide analytical forms for this quantity in the long-distance limit. In the course of this we identify the averaged over the Brillouin zone Fubini-Study metric as the relevant metric in the long-distance... [Phys. Rev. B 88, 115117] Published Tue Sep 10, 2013

Keywords: Electronic structure and strongly correlated systems

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Anomaly induced chiral magnetic current in a Weyl semimetal: Chiral electronics (2013)

Dmitri E. Kharzeev and Ho-Ung Yee

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): Dmitri E. Kharzeev and Ho-Ung Yee Electric circuits involving Weyl semimetals possess unusual properties induced by the quantum anomaly. The chiral magnetic current in a Weyl semimetal subjected to magnetic field modifies the behavior of such circuits in a drastic way. We consider two explicit examples: (i) a circuit involving the “... [Phys. Rev. B 88, 115119] Published Wed Sep 11, 2013

Keywords: Electronic structure and strongly correlated systems

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Local characterization of one-dimensional topologically ordered states (2013)

Jian Cui, Luigi Amico, Heng Fan, Mile Gu, Alioscia Hamma, and Vlatko Vedral

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): Jian Cui, Luigi Amico, Heng Fan, Mile Gu, Alioscia Hamma, and Vlatko Vedral We consider one-dimensional Hamiltonian systems whose ground states display symmetry-protected topological order. We show that ground states within the topological phase cannot be connected with each other through local operations and classical communication between a bipartition of the system. Our ... [Phys. Rev. B 88, 125117] Published Wed Sep 11, 2013

Keywords: Electronic structure and strongly correlated systems

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Localized defect modes in graphene (2013)

Alexander V. Savin and Yuri S. Kivshar

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-12

Description: Author(s): Alexander V. Savin and Yuri S. Kivshar We study the properties of localized vibrational modes associated with structural defects in a sheet of graphene. For the examples of the Stone-Wales defects, one- and two-atom vacancies, many-atom linear vacancies, and adatoms in a honeycomb lattice, we demonstrate that the local defect modes are c... [Phys. Rev. B 88, 125417] Published Wed Sep 11, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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^{13}C NMR study of commensurate antiferromagnetism in (TMTTF)_{2}Br (2013)

Shinji Hirose, Yang Liu, and Atsushi Kawamoto

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-13

Description: Author(s): Shinji Hirose, Yang Liu, and Atsushi Kawamoto Quasi-one-dimensional organic conductors (TMT C F) 2 X have various electric and magnetic properties. Although theoretical and experimental studies have suggested that (TMTTF) 2 Br has the properties of commensurate antiferromagnetism, details of the magnetic structure of this compound are unclear. Two ty... [Phys. Rev. B 88, 125121] Published Thu Sep 12, 2013

Keywords: Electronic structure and strongly correlated systems

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Noninvasive manipulation of the optical response of opal photonic crystals (2013)

Sergei G. Romanov, Alois Regensburger, Alexander V. Korovin, Alexandra S. Romanova, and Ulf Peschel

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-14

Description: Author(s): Sergei G. Romanov, Alois Regensburger, Alexander V. Korovin, Alexandra S. Romanova, and Ulf Peschel The efficient manipulation with optical spectra of colloidal photonic crystals was achieved using the metal mirror positioned either immediately or at a distance from the crystal surface. If the mirror is close to the surface, the changes are mostly quantitative and relate to the improved light conf... [Phys. Rev. B 88, 125418] Published Fri Sep 13, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Electron momentum density in liquid silicon (2013)

K. Matsuda, T. Nagao, Y. Kajihara, M. Inui, K. Tamura, J. Nakamura, K. Kimura, M. Yao, M. Itou, Y. Sakurai, and N. Hiraoka

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): K. Matsuda, T. Nagao, Y. Kajihara, M. Inui, K. Tamura, J. Nakamura, K. Kimura, M. Yao, M. Itou, Y. Sakurai, and N. Hiraoka The electron momentum density (EMD) in liquid silicon (Si) has been measured by synchrotron-based Compton scattering. The observed variation in the valence EMD upon melting, reflecting a semiconductor-metal transition of Si, is well explained by the collapse of the Jones zone of crystalline Si. Howe... [Phys. Rev. B 88, 115125] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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Scaling of electrical and thermal conductivities in an almost integrable chain (2013)

Yichen Huang, C. Karrasch, and J. E. Moore

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Yichen Huang, C. Karrasch, and J. E. Moore Many low-dimensional materials are well described by integrable one-dimensional models such as the Hubbard model of electrons or the Heisenberg model of spins. However, the small perturbations to these models required to describe real materials are expected to have singular effects on transport quan... [Phys. Rev. B 88, 115126] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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Superconductivity in the two-dimensional Hubbard model: Gutzwiller wave function solution (2013)

Jan Kaczmarczyk, Jozef Spałek, Tobias Schickling, and Jörg Bünemann

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Jan Kaczmarczyk, Jozef Spałek, Tobias Schickling, and Jörg Bünemann A systematic diagrammatic expansion for Gutzwiller-wave functions (DE-GWF) is formulated and used for the description of superconducting (SC) ground state in the two-dimensional Hubbard model with electron-transfer amplitudes t (and t ′ ) between nearest (and next-nearest) neighbors. The method is num... [Phys. Rev. B 88, 115127] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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Thermoelectric effect of correlated metals: Band-structure effects and the breakdown of Mott's formula (2013)

Jonathan M. Buhmann and Manfred Sigrist

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Jonathan M. Buhmann and Manfred Sigrist We study the thermoelectric effect of two-dimensional metals on a square lattice within semiclassical Boltzmann transport theory with particular focus on electron-electron scattering. We compute the electrical conductivity and the Seebeck coefficient as a function of band filling and temperature for... [Phys. Rev. B 88, 115128] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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Charge compensation by long-period reconstruction in strongly polar lithium niobate surfaces (2013)

S. Sanna, S. Rode, R. Hölscher, S. Klassen, C. Marutschke, K. Kobayashi, H. Yamada, W. G. Schmidt, and A. Kühnle

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): S. Sanna, S. Rode, R. Hölscher, S. Klassen, C. Marutschke, K. Kobayashi, H. Yamada, W. G. Schmidt, and A. Kühnle The microscopic structure of the polar (0001̅ ) and (0001) surfaces of lithium niobate is investigated by atomic-resolution frequency modulation atomic force microscopy and first-principles calculations. It is found that the surface reconstructs at annealing temperatures sufficiently high to ... [Phys. Rev. B 88, 115422] Published Mon Sep 16, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Impact of disorder on Dirac plasmon losses (2013)

Alessandro Principi, Giovanni Vignale, Matteo Carrega, and Marco Polini

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Alessandro Principi, Giovanni Vignale, Matteo Carrega, and Marco Polini Recent scattering-type scanning near-field optical spectroscopy (s-SNOM) experiments on single-layer graphene have reported Dirac plasmon lifetimes that are substantially shorter than the dc transport scattering time τ tr . We argue that this discrepancy arises from the fact that the plasmon lifetime ... [Phys. Rev. B 88, 121405] Published Mon Sep 16, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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Strain and composition dependence of orbital polarization in nickel oxide superlattices (2013)

M. Wu, E. Benckiser, M. W. Haverkort, A. Frano, Y. Lu, U. Nwankwo, S. Brück, P. Audehm, E. Goering, S. Macke, V. Hinkov, P. Wochner, G. Christiani, S. Heinze, G. Logvenov, H.-U. Habermeier, and B. Keimer

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): M. Wu, E. Benckiser, M. W. Haverkort, A. Frano, Y. Lu, U. Nwankwo, S. Brück, P. Audehm, E. Goering, S. Macke, V. Hinkov, P. Wochner, G. Christiani, S. Heinze, G. Logvenov, H.-U. Habermeier, and B. Keimer A combined analysis of x-ray absorption and resonant reflectivity data was used to obtain the orbital polarization profiles of superlattices composed of four-unit-cell-thick layers of metallic LaNiO 3 and layers of insulating R X O 3 ( R =La, Gd, Dy and X =Al, Ga, Sc), grown on substrates that impose eithe... [Phys. Rev. B 88, 125124] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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Evidence of reduced surface electron-phonon scattering in the conduction band of Bi_{2}Se_{3} by nonequilibrium ARPES (2013)

A. Crepaldi, F. Cilento, B. Ressel, C. Cacho, J. C. Johannsen, M. Zacchigna, H. Berger, Ph. Bugnon, C. Grazioli, I. C. E. Turcu, E. Springate, K. Kern, M. Grioni, and F. Parmigiani

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): A. Crepaldi, F. Cilento, B. Ressel, C. Cacho, J. C. Johannsen, M. Zacchigna, H. Berger, Ph. Bugnon, C. Grazioli, I. C. E. Turcu, E. Springate, K. Kern, M. Grioni, and F. Parmigiani The nature of the Dirac quasiparticles in topological insulators calls for a direct investigation of the electron-phonon scattering at the surface . By comparing time-resolved ARPES measurements of the topological insulator Bi 2 Se 3 with different probing depths, we show that the relaxation dynamics of... [Phys. Rev. B 88, 121404] Published Mon Sep 16, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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81

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Interplay between energy dissipation and reservoir-induced thermalization in nonequilibrium quantum nanodevices (2013)

Fabrizio Dolcini, Rita Claudia Iotti, and Fausto Rossi

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Fabrizio Dolcini, Rita Claudia Iotti, and Fausto Rossi A solid state electronic nanodevice is an intrinsically open quantum system, exchanging both energy with the host material and carriers with connected reservoirs. Its out-of-equilibrium behavior is determined by a nontrivial interplay between electronic dissipation and decoherence induced by inelast... [Phys. Rev. B 88, 115421] Published Mon Sep 16, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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82

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Magnetism and local structure in low-dimensional Mott insulating GdTiO_{3} (2013)

Jack Y. Zhang, Clayton A. Jackson, Santosh Raghavan, Jinwoo Hwang, and Susanne Stemmer

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Jack Y. Zhang, Clayton A. Jackson, Santosh Raghavan, Jinwoo Hwang, and Susanne Stemmer Cation displacements, oxygen octahedral tilts, and magnetism of epitaxial, ferrimagnetic, insulating GdTiO 3 films sandwiched between cubic SrTiO 3 layers are studied using scanning transmission electron microscopy and magnetization measurements. With decreasing GdTiO 3 film thickness, structural (GdFe... [Phys. Rev. B 88, 121104] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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Weak localization effects as evidence for bulk quantization in Bi_{2}Se_{3} thin films (2013)

Li Zhang, Merav Dolev, Qi I. Yang, Robert H. Hammond, Bo Zhou, Alexander Palevski, Yulin Chen, and Aharon Kapitulnik

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Li Zhang, Merav Dolev, Qi I. Yang, Robert H. Hammond, Bo Zhou, Alexander Palevski, Yulin Chen, and Aharon Kapitulnik Strong spin-orbit coupling in topological insulators results in the ubiquitously observed weak antilocalization feature in their magnetoresistance. Here we present magnetoresistance measurements in ultrathin films of the topological insulator Bi 2 Se 3 and show that in the two-dimensional quantum limit... [Phys. Rev. B 88, 121103] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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84

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Transport model for homogenized uniaxial wire media: Three-dimensional scattering problems and homogenized model limits (2013)

Ebrahim Forati and George W. Hanson

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Ebrahim Forati and George W. Hanson A transport-based formulation is used to model three-dimensional objects made of a uniaxial wire medium. The resulting drift-diffusion equation is used to calculate the extinction/scattering cross section of various uniaxial wire medium objects. A comparison is made with measurement and full wave si... [Phys. Rev. B 88, 125125] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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85

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Ordered phases in the Holstein-Hubbard model: Interplay of strong Coulomb interaction and electron-phonon coupling (2013)

Yuta Murakami, Philipp Werner, Naoto Tsuji, and Hideo Aoki

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-17

Description: Author(s): Yuta Murakami, Philipp Werner, Naoto Tsuji, and Hideo Aoki We study the Holstein-Hubbard model at half filling to explore ordered phases including superconductivity (SC), antiferromagnetism (AF), and charge order (CO) in situations where the electron-electron and electron-phonon interactions are strong (comparable to the electronic bandwidth). The model is ... [Phys. Rev. B 88, 125126] Published Mon Sep 16, 2013

Keywords: Electronic structure and strongly correlated systems

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86

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Un-Fermi liquids: Unparticles in strongly correlated electron matter (2013)

Philip W. Phillips, Brandon W. Langley, and Jimmy A. Hutasoit

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-18

Description: Author(s): Philip W. Phillips, Brandon W. Langley, and Jimmy A. Hutasoit Since any nontrivial infrared dynamics in strongly correlated electron matter must be controlled by a critical fixed point, we argue that the form of the single-particle propagator can be deduced simply by imposing scale invariance. As a consequence, the unparticle picture proposed by Georgi[14] is ... [Phys. Rev. B 88, 115129] Published Tue Sep 17, 2013

Keywords: Electronic structure and strongly correlated systems

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87

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Distinct in-plane resistivity anisotropy in a detwinned FeTe single crystal: Evidence for a Hund's metal (2013)

Juan Jiang (姜娟), C. He (贺诚), Y. Zhang (张焱), M. Xu (徐敏), Q. Q. Ge (葛青亲), Z. R. Ye (叶子荣), F. Chen (陈飞), B. P. Xie (谢斌平), and D. L. Feng (封东来)

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-18

Description: Author(s): Juan Jiang (姜娟), C. He (贺诚), Y. Zhang (张焱), M. Xu (徐敏), Q. Q. Ge (葛青亲), Z. R. Ye (叶子荣), F. Chen (陈飞), B. P. Xie (谢斌平), and D. L. Feng (封东来) The in-plane resistivity anisotropy has been studied with the Montgomery method on the detwinned parent compound of the iron-based superconductor FeTe. The observed resistivity in the antiferromagnetic (AFM) direction is larger than that in the ferromagnetic (FM) direction, which is different from t... [Phys. Rev. B 88, 115130] Published Tue Sep 17, 2013

Keywords: Electronic structure and strongly correlated systems

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88

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Interaction of C_{60} with clean and hydrogenated SiC-(3×3) probed through the unoccupied electronic states (2013)

F. C. Bocquet, Y. Ksari, Y. P. Lin, L. Porte, and J.-M. Themlin

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-18

Description: Author(s): F. C. Bocquet, Y. Ksari, Y. P. Lin, L. Porte, and J.-M. Themlin The effect of hydrogenation on the conduction bands of the Si-rich 6 H -SiC(0001)-(3×3) reconstruction is studied using inverse photoemission spectroscopy in order to distinguish surface from bulk states. These results are exploited for the comparative study of the interaction of C 60 adsorbed on (3×3)... [Phys. Rev. B 88, 125421] Published Tue Sep 17, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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89

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Beyond the random phase approximation: Improved description of short-range correlation by a renormalized adiabatic local density approximation (2013)

Thomas Olsen and Kristian S. Thygesen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-19

Description: Author(s): Thomas Olsen and Kristian S. Thygesen We assess the performance of a recently proposed renormalized adiabatic local density approximation (rALDA) for ab initio calculations of electronic correlation energies in solids and molecules. The method is an extension of the random phase approximation (RPA) derived from time-dependent density fu... [Phys. Rev. B 88, 115131] Published Wed Sep 18, 2013

Keywords: Electronic structure and strongly correlated systems

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90

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Quantum manipulation of valleys in bilayer graphene (2013)

G. Y. Wu, N.-Y. Lue, and Y.-C. Chen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-19

Description: Author(s): G. Y. Wu, N.-Y. Lue, and Y.-C. Chen The valley pseudospin is an inherent electron degree of freedom in graphene. This work establishes a theory for manipulation of valley pseudospins at the quantum level, in bilayer graphene. Two key mechanisms of valley manipulation are proposed and valley-based quantum devices—qubits and field-effec... [Phys. Rev. B 88, 125422] Published Wed Sep 18, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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91

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Exact spectral function for hole-magnon coupling in a ferromagnetic CuO_{3}-like chain (2013)

Krzysztof Bieniasz and Andrzej M. Oleś

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-19

Description: Author(s): Krzysztof Bieniasz and Andrzej M. Oleś We present the exact spectral function for a single oxygen hole with spin opposite to ferromagnetic order within a one-dimensional CuO 3 -like spin chain. We find that local Kondo-like exchange interaction generates five different states in the strong-coupling regime. It stabilizes a spin polaron whic... [Phys. Rev. B 88, 115132] Published Wed Sep 18, 2013

Keywords: Electronic structure and strongly correlated systems

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92

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Finite-temperature properties of strongly correlated fermions in the honeycomb lattice (2013)

Baoming Tang, Thereza Paiva, Ehsan Khatami, and Marcos Rigol

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-19

Description: Author(s): Baoming Tang, Thereza Paiva, Ehsan Khatami, and Marcos Rigol We study finite-temperature properties of strongly interacting fermions in the honeycomb lattice using numerical linked-cluster expansions and determinantal quantum Monte Carlo simulations. We analyze a number of thermodynamic quantities, including the entropy, the specific heat, uniform and stagger... [Phys. Rev. B 88, 125127] Published Wed Sep 18, 2013

Keywords: Electronic structure and strongly correlated systems

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93

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Exactly soluble lattice models for non-Abelian states of matter in two dimensions (2013)

Maciej Koch-Janusz, Michael Levin, and Ady Stern

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-20

Description: Author(s): Maciej Koch-Janusz, Michael Levin, and Ady Stern Following an earlier construction of exactly soluble lattice models for Abelian fractional topological insulators in two and three dimensions, we construct here an exactly soluble lattice model for a non-Abelian ν =1 quantum Hall state and a non-Abelian topological insulator in two dimensions. We sho... [Phys. Rev. B 88, 115133] Published Thu Sep 19, 2013

Keywords: Electronic structure and strongly correlated systems

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94

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Coexistence of diffusive resistance and ballistic persistent current in disordered metallic rings with rough edges: Possible origin of puzzling experimental values (2013)

J. Feilhauer and M. Moško

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-20

Description: Author(s): J. Feilhauer and M. Moško Typical persistent current ( I typ ) in a mesoscopic normal metal ring with disorder due to rough edges and random grain boundaries is calculated by use of a scattering matrix method. In addition, resistance of a corresponding metallic wire is obtained from the Landauer formula and the electron mean fr... [Phys. Rev. B 88, 125424] Published Thu Sep 19, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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95

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Current-driven homogenization and effective medium parameters for finite samples (2013)

Vadim A. Markel and Igor Tsukerman

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-24

Description: Author(s): Vadim A. Markel and Igor Tsukerman Reflection and refraction of electromagnetic waves by artificial periodic composites (metamaterials) can be accurately modeled by an effective medium theory only if the boundary of the medium is explicitly taken into account and the two effective parameters of the medium (the index of refraction and... [Phys. Rev. B 88, 125131] Published Mon Sep 23, 2013

Keywords: Electronic structure and strongly correlated systems

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96

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Strong anisotropic influence of local-field effects on the dielectric response of α-MoO_{3} (2013)

L. Lajaunie, F. Boucher, R. Dessapt, and P. Moreau

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-26

Description: Author(s): L. Lajaunie, F. Boucher, R. Dessapt, and P. Moreau Dielectric properties of α-MoO 3 are investigated by a combination of valence electron-energy-loss spectroscopy and ab initio calculation at the random-phase approximation level with the inclusion of local-field effects (LFE). A meticulous comparison between experimental and calculated spectra is per... [Phys. Rev. B 88, 115141] Published Wed Sep 25, 2013

Keywords: Electronic structure and strongly correlated systems

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97

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Edge states in silicene nanodisks (2013)

Ko Kikutake, Motohiko Ezawa, and Naoto Nagaosa

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-26

Description: Author(s): Ko Kikutake, Motohiko Ezawa, and Naoto Nagaosa Silicene is a honeycomb structure of silicon atoms which shares many intriguing properties with graphene. We investigate the electronic properties of a silicene nanodisk, which is silicene with a closed edge. In the case of a graphene nanodisk, the number of the zero-energy modes is given by the low... [Phys. Rev. B 88, 115432] Published Wed Sep 25, 2013

Keywords: Surface physics, nanoscale physics, low-dimensional systems

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98

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Switching and propagation of magnetoplasmon polaritons in magnetic slot waveguides and cavities (2013)

D. Nikolova and A. J. Fisher

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-09-26

Description: Author(s): D. Nikolova and A. J. Fisher The dispersion relations for surface plasmon polaritons propagating in the Voigt geometry in a metal-insulator-metal waveguide with a magneto-optically active dielectric medium are derived. The symmetry between the upper and lower interfaces is broken by the introduction of the magnetic field; the b... [Phys. Rev. B 88, 125136] Published Wed Sep 25, 2013

Keywords: Electronic structure and strongly correlated systems

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99

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Quench dynamics of one-dimensional bosons in a commensurate periodic potential: A quantum kinetic equation approach (2013)

Marco Tavora and Aditi Mitra

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Marco Tavora and Aditi Mitra Results are presented for the dynamics arising due to a sudden quench of a boson interaction parameter with the simultaneous switching on of a commensurate periodic potential, the latter providing a source of nonlinearity that can cause inelastic scattering. A quantum kinetic equation is derived per... [Phys. Rev. B 88, 115144] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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100

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Superconductivity and bandwidth-controlled Mott metal-insulator transition in 1T-TaS_{2−x}Se_{x} (2013)

R. Ang, Y. Miyata, E. Ieki, K. Nakayama, T. Sato, Y. Liu, W. J. Lu, Y. P. Sun, and T. Takahashi

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): R. Ang, Y. Miyata, E. Ieki, K. Nakayama, T. Sato, Y. Liu, W. J. Lu, Y. P. Sun, and T. Takahashi We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) of layered chalcogenide 1 T -TaS 2− x Se x to elucidate the electronic states especially relevant to the occurrence of superconductivity. We found a direct evidence for a Ta-5 d -derived electron pocket associated with the s... [Phys. Rev. B 88, 115145] Published Mon Sep 30, 2013

Keywords: Electronic structure and strongly correlated systems

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