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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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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

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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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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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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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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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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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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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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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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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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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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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

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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

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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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^{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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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

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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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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

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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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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

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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

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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

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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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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

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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

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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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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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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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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

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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

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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

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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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Lattice distortion effects on topological phases in (LaNiO_{3})_{2}/(LaAlO_{3})_{N} heterostructures grown along the [111] direction (2013)

Andreas Rüegg, Chandrima Mitra, Alexander A. Demkov, and Gregory A. Fiete

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-01

Description: Author(s): Andreas Rüegg, Chandrima Mitra, Alexander A. Demkov, and Gregory A. Fiete We theoretically investigate the influence of lattice distortion effects on possible topological phases in (LaNiO 3 ) 2 /(LaAlO 3 ) N heterostructures grown along the [111] direction. At the Hartree-Fock level, topological phases originate from an interaction-generated effective spin-orbit coupling that op... [Phys. Rev. B 88, 115146] Published Mon Sep 30, 2013

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Electronic structure of the iron chalcogenide KFeAgTe_{2} revealed by angle-resolved photoemission spectroscopy (2013)

R. Ang, K. Nakayama, W.-G. Yin, T. Sato, Hechang Lei, C. Petrovic, and T. Takahashi

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-03

Description: Author(s): R. Ang, K. Nakayama, W.-G. Yin, T. Sato, Hechang Lei, C. Petrovic, and T. Takahashi We have performed angle-resolved photoemission spectroscopy (ARPES) of KFeAgTe 2 , and revealed the absence of band crossing at the Fermi level ( E F ) indicative of the unconventional insulating nature of this material. Comparison of the ARPES-derived band dispersions with the first-principles calculati... [Phys. Rev. B 88, 155102] Published Wed Oct 02, 2013

Keywords: Electronic structure and strongly correlated systems

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Unconventional diffusion of light in strongly localized open absorbing media (2013)

Li-Yi Zhao, Chu-Shun Tian, Zhao-Qing Zhang, and Xiang-Dong Zhang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-04

Description: Author(s): Li-Yi Zhao, Chu-Shun Tian, Zhao-Qing Zhang, and Xiang-Dong Zhang Very recent experiments have discovered that localized light in strongly absorbing media displays intriguing diffusive phenomena. Here we develop a first-principles theory of light propagation in open media with arbitrary absorption strength and sample length. We show analytically that waves in loca... [Phys. Rev. B 88, 155104] Published Thu Oct 03, 2013

Keywords: Electronic structure and strongly correlated systems

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Resonant inelastic x-ray scattering at the Fe L_{3} edge of the one-dimensional chalcogenide BaFe_{2}Se_{3} (2013)

C. Monney, A. Uldry, K. J. Zhou, A. Krzton-Maziopa, E. Pomjakushina, V. N. Strocov, B. Delley, and T. Schmitt

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-04

Description: Author(s): C. Monney, A. Uldry, K. J. Zhou, A. Krzton-Maziopa, E. Pomjakushina, V. N. Strocov, B. Delley, and T. Schmitt We present an electronic structure study of the quasi-one-dimensional chalcogenide BaFe 2 Se 3 using resonant inelastic x-ray scattering (RIXS) at the Fe L 3 edge. In addition to broad spectral contributions from fluorescence, sharp peaks are seen at the low-energy end of the spectra, suggesting the coe... [Phys. Rev. B 88, 165103] Published Thu Oct 03, 2013

Keywords: Electronic structure and strongly correlated systems

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Large-scale atomistic density functional theory calculations of phosphorus-doped silicon quantum bits (2013)

Loren Greenman, Heather D. Whitley, and K. Birgitta Whaley

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-04

Description: Author(s): Loren Greenman, Heather D. Whitley, and K. Birgitta Whaley We present density functional theory calculations of phosphorus dopants in bulk silicon and of several properties relating to their use as spin qubits for quantum computation. Rather than a mixed pseudopotential or a Heitler-London approach, we have used an explicit treatment for the phosphorus dono... [Phys. Rev. B 88, 165102] Published Thu Oct 03, 2013

Keywords: Electronic structure and strongly correlated systems

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Cluster expansion made easy with Bayesian compressive sensing (2013)

Lance J. Nelson, Vidvuds Ozoliņš, C. Shane Reese, Fei Zhou, and Gus L. W. Hart

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-04

Description: Author(s): Lance J. Nelson, Vidvuds Ozoliņš, C. Shane Reese, Fei Zhou, and Gus L. W. Hart Long-standing challenges in cluster expansion (CE) construction include choosing how to truncate the expansion and which crystal structures to use for training. Compressive sensing (CS), which is emerging as a powerful tool for model construction in physics, provides a mathematically rigorous framew... [Phys. Rev. B 88, 155105] Published Thu Oct 03, 2013

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Competition between three-sublattice order and superfluidity in the quantum three-state Potts model of ultracold bosons and fermions on a square optical lattice (2013)

Laura Messio, Philippe Corboz, and Frédéric Mila

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-05

Description: Author(s): Laura Messio, Philippe Corboz, and Frédéric Mila We study a quantum version of the three-state Potts model that includes as special cases the effective models of bosons and fermions on the square lattice in the Mott-insulating limit. It can be viewed as a model of quantum permutations with amplitudes J ∥ and J ⊥ for identical and different colors, r... [Phys. Rev. B 88, 155106] Published Fri Oct 04, 2013

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Causality and passivity properties of effective parameters of electromagnetic multilayered structures (2013)

Yan Liu, Sébastien Guenneau, and Boris Gralak

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-05

Description: Author(s): Yan Liu, Sébastien Guenneau, and Boris Gralak Effective properties of periodic structures are investigated at all frequencies. It is shown that a simple dielectric multilayer with arbitrary low contrast can display artificial magnetoelectric coupling and magnetism. Effective parameters, as functions of the complex frequency, possess all the ana... [Phys. Rev. B 88, 165104] Published Fri Oct 04, 2013

Keywords: Electronic structure and strongly correlated systems

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Complex phases in the doped two-species bosonic Hubbard model (2013)

Kalani Hettiarachchilage, Valéry G. Rousseau, Ka-Ming Tam, Mark Jarrell, and Juana Moreno

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-05

Description: Author(s): Kalani Hettiarachchilage, Valéry G. Rousseau, Ka-Ming Tam, Mark Jarrell, and Juana Moreno We study a doped two-dimensional bosonic Hubbard model with two hard-core species using quantum Monte Carlo simulations. With doping we find five distinct phases, including a normal liquid at higher temperature, an antiferromagnetically ordered Mott insulator, a region of coexistent antiferromagneti... [Phys. Rev. B 88, 161101] Published Fri Oct 04, 2013

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Engineering Weyl nodes in Dirac semimetals by a magnetic field (2013)

E. V. Gorbar, V. A. Miransky, and I. A. Shovkovy

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-05

Description: Author(s): E. V. Gorbar, V. A. Miransky, and I. A. Shovkovy We study the phase diagram of a Dirac semimetal in a magnetic field at a nonzero charge density. It is shown that there exists a critical value of the chemical potential at which a first-order phase transition takes place. At subcritical values of the chemical potential the ground state is a gapped ... [Phys. Rev. B 88, 165105] Published Fri Oct 04, 2013

Keywords: Electronic structure and strongly correlated systems

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Coupling of the As A_{1g} phonon to magnetism in iron pnictides (2013)

N. A. García-Martínez, B. Valenzuela, S. Ciuchi, E. Cappelluti, M. J. Calderón, and E. Bascones

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-05

Description: Author(s): N. A. García-Martínez, B. Valenzuela, S. Ciuchi, E. Cappelluti, M. J. Calderón, and E. Bascones Charge, spin, and lattice degrees of freedom are strongly entangled in iron superconductors. A neat consequence of this entanglement is the behavior of the A 1 g As-phonon resonance in the different polarization symmetries of Raman spectroscopy when undergoing the magnetostructural transition. In this... [Phys. Rev. B 88, 165106] Published Fri Oct 04, 2013

Keywords: Electronic structure and strongly correlated systems

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Local electronic state in the high-valence hollandite-type chromium oxide K_{2}Cr_{8}O_{16} investigated by ^{53}Cr NMR (2013)

Hikaru Takeda, Yasuhiro Shimizu, Masayuki Itoh, Masahiko Isobe, and Yutaka Ueda

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-10-05

Description: Author(s): Hikaru Takeda, Yasuhiro Shimizu, Masayuki Itoh, Masahiko Isobe, and Yutaka Ueda We have performed 53 Cr NMR measurements to investigate the local electronic state of a hollandite-type chromium oxide K 2 Cr 8 O 16 which undergoes an unusual metal-insulator (MI) transition at T MI = 95 K in the ferromagnetic phase. In the ferromagnetic insulating phase, we observed NMR spectra with inte... [Phys. Rev. B 88, 165107] Published Fri Oct 04, 2013

Keywords: Electronic structure and strongly correlated systems

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Anisotropy of the resistivity and charge-carrier sign in nanolaminated Ti_{2}AlC: Experiment and ab initio calculations (2013)

Vincent Mauchamp, Wenbo Yu, Loïk Gence, Luc Piraux, Thierry Cabioc'h, Véronique Gauthier, Per Eklund, and Sylvain Dubois

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-06

Description: Author(s): Vincent Mauchamp, Wenbo Yu, Loïk Gence, Luc Piraux, Thierry Cabioc'h, Véronique Gauthier, Per Eklund, and Sylvain Dubois The anisotropy of Ti 2 AlC transport properties is investigated focusing on the Hall effect and resistivity vs temperature measurements performed on a highly (000l)-oriented thin film and a bulk polycrystalline sample. Experimental data are interpreted on the basis of density functional theory calcula... [Phys. Rev. B 87, 235105] Published Wed Jun 05, 2013

Keywords: Electronic structure and strongly correlated systems

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Formation of orbital-selective electron states in LaTiO_{3}/SrTiO_{3} superlattices (2013)

Frank Lechermann, Lewin Boehnke, and Daniel Grieger

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-06

Description: Author(s): Frank Lechermann, Lewin Boehnke, and Daniel Grieger The interface electronic structure of correlated LaTiO 3 /SrTiO 3 superlattices is investigated by means of the charge self-consistent combination of the local density approximation (LDA) to density functional theory with dynamical mean-field theory. Utilizing a pseudopotential technique together with ... [Phys. Rev. B 87, 241101] Published Wed Jun 05, 2013

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Accurate determination of band gaps within density functional formalism (2013)

Prashant Singh, Manoj K. Harbola, Biplab Sanyal, and Abhijit Mookerjee

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-12

Description: Author(s): Prashant Singh, Manoj K. Harbola, Biplab Sanyal, and Abhijit Mookerjee In this paper, we report an adaptation of the Harbola-Sahni (HS) exchange potential to the tight-binding linear muffin-tin orbital (TB-LMTO) method to determine band gaps (BGs) of solids accurately. We show that the electrostatic basis of derivation of the Harbola-Sahni potential allows this nonvari... [Phys. Rev. B 87, 235110] Published Tue Jun 11, 2013

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Disorder-controlled superconductivity at YBa_{2}Cu_{3}O_{7}/SrTiO_{3} interfaces (2013)

J. Garcia-Barriocanal, A. M. Perez-Muñoz, Z. Sefrioui, D. Arias, M. Varela, C. Leon, S. J. Pennycook, and J. Santamaria

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-12

Description: Author(s): J. Garcia-Barriocanal, A. M. Perez-Muñoz, Z. Sefrioui, D. Arias, M. Varela, C. Leon, S. J. Pennycook, and J. Santamaria We examine the effect of interface disorder in suppressing superconductivity in coherently grown ultrathin YBa 2 Cu 3 O 7 (YBCO) layers on SrTiO 3 (STO) in YBCO/STO superlattices. The termination plane of the STO is TiO 2 and the CuO chains are missing at the interface. Disorder (steps) at the STO interfac... [Phys. Rev. B 87, 245105] Published Tue Jun 11, 2013

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Phase diagram of the anisotropic spin-2 XXZ model: Infinite-system density matrix renormalization group study (2013)

Jonas A. Kjäll, Michael P. Zaletel, Roger S. K. Mong, Jens H. Bardarson, and Frank Pollmann

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-07

Description: Author(s): Jonas A. Kjäll, Michael P. Zaletel, Roger S. K. Mong, Jens H. Bardarson, and Frank Pollmann We study the ground-state phase diagram of the quantum spin-2 XXZ chain in the presence of on-site anisotropy using a matrix-product state based infinite-system density matrix renormalization group (iDMRG) algorithm. One of the interests in this system is in connecting the highly quantum-mechanical ... [Phys. Rev. B 87, 235106] Published Thu Jun 06, 2013

Keywords: Electronic structure and strongly correlated systems

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Daniel Hansen and B. Sriram Shastry

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-07

Description: Author(s): Daniel Hansen and B. Sriram Shastry We present detailed results from a recent microscopic theory of extremely correlated Fermi liquids, applied to the t - J model in two dimensions, developed recently by Shastry [ Phys. Rev. Lett. 107 056403 (2011) ; Phys. Rev. B 87 125124 (2013) ]. The second-order theory in the parameter λ , related t... [Phys. Rev. B 87, 245101] Published Thu Jun 06, 2013

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Inhomogeneous superconducting phases in the frustrated Kondo-Heisenberg chain (2013)

Ariel Dobry, Akbar Jaefari, and Eduardo Fradkin

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-08

Description: Author(s): Ariel Dobry, Akbar Jaefari, and Eduardo Fradkin We use bosonization and renormalization group methods to determine the ground-state phase diagram of a one-dimensional frustrated Kondo-Heisenberg system consisting of a one-dimensional spin-1/2 Luttinger liquid coupled by a Kondo exchange interaction J K to a frustrated quantum antiferromagnetic Hei... [Phys. Rev. B 87, 245102] Published Fri Jun 07, 2013

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Anisotropic Dirac electronic structures of AMnBi_{2} (A=Sr,Ca) (2013)

Geunsik Lee, Muhammad A. Farhan, Jun Sung Kim, and Ji Hoon Shim

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-12

Description: Author(s): Geunsik Lee, Muhammad A. Farhan, Jun Sung Kim, and Ji Hoon Shim Low-energy electronic structures in A MnBi 2 ( A =alkaline earths) are investigated using a first-principles calculation and a tight binding method. An anisotropic Dirac dispersion is induced by the checkerboard arrangement of A atoms above and below the Bi square net in A MnBi 2 . SrMnBi 2 and CaMnBi 2 have... [Phys. Rev. B 87, 245104] Published Tue Jun 11, 2013

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Superconductivity under pressure in RFeAsO_{1−x}F_{x} (R = La, Ce−Sm) by dc magnetization measurements (2013)

Kiyotaka Miyoshi, Eiko Kojima, Saki Ogawa, Yuta Shimojo, and Jun Takeuchi

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-12

Description: Author(s): Kiyotaka Miyoshi, Eiko Kojima, Saki Ogawa, Yuta Shimojo, and Jun Takeuchi Superconducting transition under pressure ( P ) has been investigated for optimum-doped R FeAsO 1− x F x ( R =La, Ce–Sm) by dc magnetization measurements. For R =La, T c is found to be pressure independent up to P ∼3.0 GPa and then shows a monotonic decrease with increasing pressure. The plateau width decreases... [Phys. Rev. B 87, 235111] Published Tue Jun 11, 2013

Keywords: Electronic structure and strongly correlated systems

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Scaling of the entanglement spectrum near quantum phase transitions (2013)

L. Lepori, G. De Chiara, and A. Sanpera

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-08

Description: Author(s): L. Lepori, G. De Chiara, and A. Sanpera The entanglement spectrum describing quantum correlations in many-body systems has been recently recognized as a key tool to characterize different quantum phases, including topological ones. Here we derive its analytically scaling properties in the vicinity of some integrable quantum phase transiti... [Phys. Rev. B 87, 235107] Published Fri Jun 07, 2013

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Optical conductivity of visons in Z_{2} spin liquids close to a valence bond solid transition on the kagome lattice (2013)

Yejin Huh, Matthias Punk, and Subir Sachdev

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-11

Description: Author(s): Yejin Huh, Matthias Punk, and Subir Sachdev We consider Z 2 spin liquids on the kagome lattice on the verge of a valence bond solid (VBS) transition, where vortex excitations carrying Z 2 magnetic flux—so-called visons—condense. We show that these vison excitations can couple directly to the external electromagnetic field, even though they carr... [Phys. Rev. B 87, 235108] Published Mon Jun 10, 2013

Keywords: Electronic structure and strongly correlated systems

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Symmetry-adapted Wannier functions in the maximal localization procedure (2013)

R. Sakuma

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-11

Description: Author(s): R. Sakuma A procedure to construct symmetry-adapted Wannier functions in the framework of the maximally localized Wannier function approach [ Marzari and Vanderbilt Phys. Rev. B 56 12847 (1997) ; Souza, Marzari and Vanderbilt Phys. Rev. B 65 035109 (2001) ] is presented. In this scheme, the minimization of t... [Phys. Rev. B 87, 235109] Published Mon Jun 10, 2013

Keywords: Electronic structure and strongly correlated systems

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83

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Measuring the quantum geometry of Bloch bands with current noise (2013)

Titus Neupert, Claudio Chamon, and Christopher Mudry

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-11

Description: Author(s): Titus Neupert, Claudio Chamon, and Christopher Mudry Single-particle states in electronic Bloch bands form a Riemannian manifold whose geometric properties are described by two gauge invariant tensors, one being symmetric and the other being antisymmetric, that can be combined into the so-called Fubini-Study metric tensor of the projective Hilbert spa... [Phys. Rev. B 87, 245103] Published Mon Jun 10, 2013

Keywords: Electronic structure and strongly correlated systems

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84

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Mechanisms for sub-gap optical conductivity in Herbertsmithite (2013)

Andrew C. Potter, T. Senthil, and Patrick A. Lee

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-06-12

Description: Author(s): Andrew C. Potter, T. Senthil, and Patrick A. Lee Recent terahertz conductivity measurements observed low-power-law frequency dependence of optical conduction within the Mott gap of the kagome lattice spin-liquid candidate Herbertsmithite. We investigate mechanisms for this observed sub-gap conductivity for two possible scenarios in which the groun... [Phys. Rev. B 87, 245106] Published Tue Jun 11, 2013

Keywords: Electronic structure and strongly correlated systems

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85

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Field-induced Mott transition in kagome lattice Hubbard model (2013)

Tomoko Kita, Takuma Ohashi, and Norio Kawakami

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-11

Description: Author(s): Tomoko Kita, Takuma Ohashi, and Norio Kawakami We investigate the magnetic-field effects on the Mott transition in the kagome lattice Hubbard model using the cellular dynamical mean-field theory combined with the continuous-time quantum Monte Carlo simulations. By calculating the magnetization and the momentum-resolved one-particle spectrum, we ... [Phys. Rev. B 87, 155119] Published Wed Apr 10, 2013

Keywords: Electronic structure and strongly correlated systems

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86

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Pyrochlore electrons under pressure, heat, and field: Shedding light on the iridates (2013)

William Witczak-Krempa, Ara Go, and Yong Baek Kim

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-02

Description: Author(s): William Witczak-Krempa, Ara Go, and Yong Baek Kim We study the finite temperature and magnetic-field phase diagram of electrons on the pyrochlore lattice subject to a local repulsion as a model for the pyrochlore iridates. We provide the most general symmetry-allowed Hamiltonian, including next-nearest-neighbor hopping, and relate it to a Slater-Ko... [Phys. Rev. B 87, 155101] Published Mon Apr 01, 2013

Keywords: Electronic structure and strongly correlated systems

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87

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Screening and nonlocal correlations in the extended Hubbard model from self-consistent combined GW and dynamical mean field theory (2013)

Thomas Ayral, Silke Biermann, and Philipp Werner

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-03-30

Description: Author(s): Thomas Ayral, Silke Biermann, and Philipp Werner We describe a recent implementation of the combined G W and dynamical mean field method ( G W +DMFT) for the two-dimensional Hubbard model with onsite and nearest-neighbor repulsion. We clarify the relation of the G W +DMFT scheme to alternative approaches in the literature, and discuss the corresponding ... [Phys. Rev. B 87, 125149] Published Fri Mar 29, 2013

Keywords: Electronic structure and strongly correlated systems

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88

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Strain effects to optimize thermoelectric properties of hole-doped La_{2}NiO_{4+δ} via ab initio calculations (2013)

Victor Pardo, Antia S. Botana, and Daniel Baldomir

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-03-30

Description: Author(s): Victor Pardo, Antia S. Botana, and Daniel Baldomir Thermoelectric properties of the system La 2 NiO 4+ δ have been recently discussed [ V. Pardo, A. S. Botana and D. Baldomir Phys. Rev. B 86 165114 (2012) ] via ab initio calculations. An optimum hole-doping value was obtained with reasonable thermopower and thermoelectric figure of merit being calculate... [Phys. Rev. B 87, 125148] Published Fri Mar 29, 2013

Keywords: Electronic structure and strongly correlated systems

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89

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Theory for charge and orbital density-wave states in manganite La_{0.5}Sr_{1.5}MnO_{4} (2013)

Zi-Jian Yao, Wei-Qiang Chen, Jin-Hua Gao, Hong-Min Jiang, and Fu-Chun Zhang

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-03

Description: Author(s): Zi-Jian Yao, Wei-Qiang Chen, Jin-Hua Gao, Hong-Min Jiang, and Fu-Chun Zhang We investigate the high-temperature phase of layered manganites, and demonstrate that the charge-orbital phase transition without magnetic order in La 0.5 Sr 1.5 MnO 4 can be understood in terms of the density-wave instability. The orbital ordering is found to be induced by the nesting between segments o... [Phys. Rev. B 87, 155103] Published Tue Apr 02, 2013

Keywords: Electronic structure and strongly correlated systems

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90

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Tunability of the k-space location of the Dirac cones in the topological crystalline insulator Pb_{1−x}Sn_{x}Te (2013)

Y. Tanaka, T. Sato, K. Nakayama, S. Souma, T. Takahashi, Zhi Ren, M. Novak, Kouji Segawa, and Yoichi Ando

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-03

Description: Author(s): Y. Tanaka, T. Sato, K. Nakayama, S. Souma, T. Takahashi, Zhi Ren, M. Novak, Kouji Segawa, and Yoichi Ando We have performed systematic angle-resolved photoemission spectroscopy of the topological crystalline insulator (TCI) Pb 1− x Sn x Te to elucidate the evolution of its electronic states across the topological phase transition. As previously reported, the band structure of SnTe ( x =1.0) measured on the (00... [Phys. Rev. B 87, 155105] Published Tue Apr 02, 2013

Keywords: Electronic structure and strongly correlated systems

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91

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X-ray absorption spectra: Graphene, h-BN, and their alloy (2013)

Somnath Bhowmick, Jan Rusz, and Olle Eriksson

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-04

Description: Author(s): Somnath Bhowmick, Jan Rusz, and Olle Eriksson Using first-principles density functional theory calculations, in conjunction with the Mahan–Nozières–de Dominicis theory, we calculate the x-ray absorption spectra of the alloys of graphene and monolayer hexagonal boron nitride on a Ni (111) substrate. The chemical neighborhood of the constituent a... [Phys. Rev. B 87, 155108] Published Wed Apr 03, 2013

Keywords: Electronic structure and strongly correlated systems

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92

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Kondoesque origin of resistivity anisotropy in graphite (2013)

L. Craco, M. S. Laad, S. Leoni, and A. S. de Arruda

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-04

Description: Author(s): L. Craco, M. S. Laad, S. Leoni, and A. S. de Arruda Based on a careful perusal of data, we revisit the longstanding issues of transport anisotropy and incoherence-coherence crossovers in graphite. Using a realistic many-body approach, we unearth surprising but distinctive signatures of band-selective Kondoesque physics in graphite. The intricate inte... [Phys. Rev. B 87, 155109] Published Wed Apr 03, 2013

Keywords: Electronic structure and strongly correlated systems

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93

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Exchange energies of kapellasite from high-temperature series analysis of the kagome lattice J_{1}-J_{2}-J_{d}-Heisenberg model (2013)

B. Bernu, C. Lhuillier, E. Kermarrec, F. Bert, P. Mendels, R. H. Colman, and A. S. Wills

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-04

Description: Author(s): B. Bernu, C. Lhuillier, E. Kermarrec, F. Bert, P. Mendels, R. H. Colman, and A. S. Wills We present a method to build magnetic models of insulators based on high-temperature expansions by fitting both the magnetic susceptibility and the low-temperature specific heat data. It is applied to the frustrated magnet kapellasite [Cu 3 Zn(OH) 6 Cl 2 ] with the J 1 - J 2 - J d -Heisenberg model on the kagome ... [Phys. Rev. B 87, 155107] Published Wed Apr 03, 2013

Keywords: Electronic structure and strongly correlated systems

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94

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Magnetism of CuX_{2} frustrated chains (X = F, Cl, Br): Role of covalency (2013)

S. Lebernegg, M. Schmitt, A. A. Tsirlin, O. Janson, and H. Rosner

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-04

Description: Author(s): S. Lebernegg, M. Schmitt, A. A. Tsirlin, O. Janson, and H. Rosner Periodic and cluster density functional theory (DFT) calculations, including DFT+ U and hybrid functionals, are applied to study magnetostructural correlations in spin-1/2 frustrated chain compounds Cu X 2 : CuCl 2 , CuBr 2 , and a fictitious chain structure of CuF 2 . The nearest-neighbor and second-neighbor... [Phys. Rev. B 87, 155111] Published Wed Apr 03, 2013

Keywords: Electronic structure and strongly correlated systems

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95

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Metal-induced charge transfer, structural distortion, and orbital order in SrTiO_{3} thin films (2013)

Jaekwang Lee, Chungwei Lin, and Alexander A. Demkov

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-04

Description: Author(s): Jaekwang Lee, Chungwei Lin, and Alexander A. Demkov The atomic and electronic properties of the Cs/SrTiO 3 heterostructure are investigated using density functional theory. Our results suggest that an antiferrodistortive (AFD) or a ferroelectric (FE) like distortion could be induced in SrTiO 3 (STO) by a Cs layer, depending on the interface bonding geo... [Phys. Rev. B 87, 165103] Published Wed Apr 03, 2013

Keywords: Electronic structure and strongly correlated systems

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96

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Effects of strong interactions in a half-metallic magnet: A determinant quantum Monte Carlo study (2013)

M. Jiang, W. E. Pickett, and R. T. Scalettar

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-04

Description: Author(s): M. Jiang, W. E. Pickett, and R. T. Scalettar Understanding the effects of electron-electron interactions in half-metallic magnets (HMs), which have band structures with one gapped spin channel and one metallic channel, poses fundamental theoretical issues as well as having importance for their potential applications. Here we use determinant qu... [Phys. Rev. B 87, 165101] Published Wed Apr 03, 2013

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97

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Optical cavity modes and waveguide geometries in hyperuniform disordered photonic solids (2013)

Marian Florescu, Paul J. Steinhardt, and Salvatore Torquato

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-11

Description: Author(s): Marian Florescu, Paul J. Steinhardt, and Salvatore Torquato Using finite-difference time domain and band structure computer simulations, we show that it is possible to construct optical cavities and waveguide architectures in hyperuniform disordered photonic solids that are unattainable in photonic crystals. The cavity modes can be classified according to th... [Phys. Rev. B 87, 165116] Published Wed Apr 10, 2013

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98

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Theory of spin-orbit coupling at LaAlO_{3}/SrTiO_{3} interfaces and SrTiO_{3} surfaces (2013)

Zhicheng Zhong, Anna Tóth, and Karsten Held

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-06

Description: Author(s): Zhicheng Zhong, Anna Tóth, and Karsten Held The theoretical understanding of the spin-orbit coupling (SOC) effects at LaAlO 3 /SrTiO 3 interfaces and SrTiO 3 surfaces is still in its infancy. We perform first-principles density-functional-theory calculations and derive from these a simple tight-binding Hamiltonian, through a Wannier function proj... [Phys. Rev. B 87, 161102] Published Fri Apr 05, 2013

Keywords: Electronic structure and strongly correlated systems

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99

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Topological phase in a two-dimensional metallic heavy-fermion system (2013)

Tsuneya Yoshida, Robert Peters, Satoshi Fujimoto, and Norio Kawakami

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-06

Description: Author(s): Tsuneya Yoshida, Robert Peters, Satoshi Fujimoto, and Norio Kawakami We report on a topological insulating state in a heavy-fermion system away from half filling, which is hidden within a ferromagnetic metallic phase. In this phase, the cooperation of the RKKY interaction and the Kondo effect, together with the spin-orbit coupling, induces a spin-selective gap, bring... [Phys. Rev. B 87, 165109] Published Fri Apr 05, 2013

Keywords: Electronic structure and strongly correlated systems

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100

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Quantized topological terms in weak-coupling gauge theories with a global symmetry and their connection to symmetry-enriched topological phases (2013)

Ling-Yan Hung and Xiao-Gang Wen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2013-04-06

Description: Author(s): Ling-Yan Hung and Xiao-Gang Wen We study the quantized topological terms in a weak-coupling gauge theory with gauge group G g and a global symmetry G s in d space-time dimensions. We show that the quantized topological terms are classified by a pair ( G , ν d ), where G is an extension of G s by G g and ν d an element in group cohomology H d ... [Phys. Rev. B 87, 165107] Published Fri Apr 05, 2013

Keywords: Electronic structure and strongly correlated systems

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