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Coulomb-induced instabilities of nodal surfaces (2018)

Pavel A. Volkov and Sergej Moroz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Pavel A. Volkov and Sergej Moroz We consider the stability of nodal surfaces in fermionic band systems with respect to the Coulomb repulsion. It is shown that nodal surfaces at the Fermi level are gapped out at low temperatures due to emergent particle-hole orders. Energy dispersion of the nodal surface suppresses the instability t... [Phys. Rev. B 98, 241107(R)] Published Thu Dec 13, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Parity-mixing superconducting phase in the Rashba-Hubbard model and its topological properties from dynamical mean-field theory (2018)

Xiancong Lu and D. Sénéchal

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-14

Beschreibung: Author(s): Xiancong Lu and D. Sénéchal We investigate parity-mixing superconductivity in the two-dimensional Hubbard model with Rashba spin-orbit coupling, using cellular dynamical mean-field theory (CDMFT). A superconducting state with mixed singlet d -wave and triplet p -wave character is found in a wide range of doping. The singlet comp... [Phys. Rev. B 98, 245118] Published Thu Dec 13, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Resilience of Majorana fermions in the face of disorder (2018)

Alireza Habibi, S. A. Jafari, and S. Rouhani

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Alireza Habibi, S. A. Jafari, and S. Rouhani We elucidate the reduction of the winding number caused by the on-site disorder in a next-nearest-neighbor XY model. When disorder becomes strong enough, Majorana edge modes become critically extended, beyond which they collapse into Anderson localized (AL) states in the bulk, resulting in a topolog... [Phys. Rev. B 98, 035142] Published Thu Jul 26, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Density-functional theory for systems with noncollinear spin: Orbital-dependent exchange-correlation functionals and their application to the Hubbard dimer (2018)

Carsten A. Ullrich

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Carsten A. Ullrich To describe noncollinear magnetism in systems such as spiral ferromagnets or spin-frustrated molecules, density-functional methods need to give a proper account of the interplay between broken spin symmetries and exchange-correlation many-body effects. Here, the author develops a class of orbital-dependent exchange-correlation functionals for systems with noncollinear spin, treating correlation via a self-consistent scheme inspired by the Singwi-Tosi-Land-Sjölander method. The approach is applied to a very simple yet nontrivial benchmark system, the asymmetric half-filled Hubbard dimer, and is found to perform well, particularly in the weakly to moderately correlated regime. [Phys. Rev. B 98, 035140] Published Thu Jul 26, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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A simple generalized gradient approximation for the noninteracting kinetic energy density functional (2018)

Kai Luo, Valentin V. Karasiev, and S. B. Trickey

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Kai Luo, Valentin V. Karasiev, and S. B. Trickey A simple, unconventional, nonempirical, constraint-based orbital-free generalized gradient approximation (GGA) noninteracting kinetic energy density functional is presented along with illustrative applications. The innovation is adaptation of constraint-based construction to the essential properties... [Phys. Rev. B 98, 041111(R)] Published Thu Jul 26, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Nonadiabatic coupling effects in ${\mathrm{MgB}}_{2}$ reexamined (2018)

Dino Novko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-27

Beschreibung: Author(s): Dino Novko The unusual Raman spectrum of MgB 2 and its formidable temperature dependence are successfully reproduced by means of a parameter-free ab initio nonadiabatic theory that accounts for the electron-hole pair scattering mechanisms with the system phonons. This example turns out to be a prototypical case... [Phys. Rev. B 98, 041112(R)] Published Thu Jul 26, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Orbital-dependent correlations in ${\mathrm{PuCoGa}}_{5}$ (2018)

W. H. Brito, S. Choi, Y. X. Yao, and G. Kotliar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): W. H. Brito, S. Choi, Y. X. Yao, and G. Kotliar We investigate the normal state of the superconducting compound PuCoGa 5 using the combination of density functional theory (DFT) and dynamical mean-field theory (DMFT), with the continuous time quantum Monte Carlo (CTQMC) and the vertex-corrected one-crossing approximation (OCA) as the impurity solv... [Phys. Rev. B 98, 035143] Published Fri Jul 27, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Unusual magnetotransport in holmium monoantimonide (2018)

Yi-Yan Wang (王义炎), Lin-Lin Sun (孙琳琳), Sheng Xu (徐升), Yuan Su (苏园), and Tian-Long Xia (夏天龙)

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Yi-Yan Wang (王义炎), Lin-Lin Sun (孙琳琳), Sheng Xu (徐升), Yuan Su (苏园), and Tian-Long Xia (夏天龙) We report the magnetotransport properties of HoSb, a semimetal with antiferromagnetic ground state. HoSb shows extremely large magnetoresistance (XMR) and Shubnikov-de Haas (SdH) oscillation at low temperature and high magnetic field. Different from previous reports in other rare earth monopnictides... [Phys. Rev. B 98, 045137] Published Fri Jul 27, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Charge redistribution in correlated heterostuctures within nonequilibrium real-space dynamical mean-field theory (2018)

Irakli Titvinidze, Max E. Sorantin, Antonius Dorda, Wolfgang von der Linden, and Enrico Arrigoni

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-28

Beschreibung: Author(s): Irakli Titvinidze, Max E. Sorantin, Antonius Dorda, Wolfgang von der Linden, and Enrico Arrigoni We address the steady-state behavior of a system consisting of several correlated monoatomic layers sandwiched between two metallic leads under the influence of a bias voltage. In particular, we investigate the interplay of the local Hubbard and the long-range Coulomb interaction on the charge redis... [Phys. Rev. B 98, 035146] Published Fri Jul 27, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Antiferroelectric distortion with anomalous phonon softening in the excitonic insulator ${\mathrm{Ta}}_{2}{\mathrm{NiSe}}_{5}$ (2018)

Akitoshi Nakano, Takumi Hasegawa, Shinya Tamura, Naoyuki Katayama, Satoshi Tsutsui, and Hiroshi Sawa

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): Akitoshi Nakano, Takumi Hasegawa, Shinya Tamura, Naoyuki Katayama, Satoshi Tsutsui, and Hiroshi Sawa Ta 2 NiSe 5 is considered a promising excitonic insulator (EI) candidate, in which the EI state is due to Coulomb interaction between electrons and holes. In Ta 2 NiSe 5 , the role of phonons is significant since the EI transition is accompanied by an orthorhombic-to-monoclinic structural transition at T s = ... [Phys. Rev. B 98, 045139] Published Mon Jul 30, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Planar Hall effect in the type-II Weyl semimetal ${T}_{d}\text{−}\mathrm{MoT}{\mathrm{e}}_{2}$ (2018)

F. C. Chen, X. Luo, J. Yan, Y. Sun, H. Y. Lv, W. J. Lu, C. Y. Xi, P. Tong, Z. G. Sheng, X. B. Zhu, W. H. Song, and Y. P. Sun

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): F. C. Chen, X. Luo, J. Yan, Y. Sun, H. Y. Lv, W. J. Lu, C. Y. Xi, P. Tong, Z. G. Sheng, X. B. Zhu, W. H. Song, and Y. P. Sun Topological Weyl semimetals (WSMs), a new quantum state of matter, provide the realization of relativistic Weyl fermions in solid-state physics. The appearance of the Weyl nodes will demonstrate novel transport phenomena related to the chiral anomaly. Theoretical prediction hints that the giant plan... [Phys. Rev. B 98, 041114(R)] Published Mon Jul 30, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Ultrafast destruction and recovery of the spin density wave order in iron-based pnictides: A multipulse optical study (2018)

M. Naseska, A. Pogrebna, G. Cao, Z. A. Xu, D. Mihailovic, and T. Mertelj

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): M. Naseska, A. Pogrebna, G. Cao, Z. A. Xu, D. Mihailovic, and T. Mertelj We report on a systematic excitation-density-dependent all-optical femtosecond time-resolved study of the spin density wave state in iron-based superconductors. The destruction and recovery dynamics are measured by means of the standard and a multipulse pump-probe technique. The experimental data ar... [Phys. Rev. B 98, 035148] Published Mon Jul 30, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Empirical pseudopotential method with nonspherical passivants for the atomistic study of silicon nanostructures (2018)

J. R. Cárdenas

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-31

Beschreibung: Author(s): J. R. Cárdenas Atomistic calculations of passivated nanostructures remain difficult due to the computational demands related to the high number of atoms to be typically considered. The empirical pseudopotential method (EPM) offers a good alternative in this sense, but finding trustable pseudopotentials for passiva... [Phys. Rev. B 98, 045308] Published Mon Jul 30, 2018

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Orbital order in FeSe: The case for vertex renormalization (2018)

Rui-Qi Xing, Laura Classen, and Andrey V. Chubukov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Rui-Qi Xing, Laura Classen, and Andrey V. Chubukov We study the structure of the orbital order Γ = d x z † d x z − d y z † d y z in FeSe in light of recent scanning tunneling microscopy and angle-resolved photoemission spectroscopy (ARPES) data, which detect the shapes of the hole and electron pockets in the nematic phase. The geometry of the pockets indicates that... [Phys. Rev. B 98, 041108(R)] Published Tue Jul 24, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Coexistence of metallic edge states and antiferromagnetic ordering in correlated topological insulators (2018)

A. Amaricci, A. Valli, G. Sangiovanni, B. Trauzettel, and M. Capone

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): A. Amaricci, A. Valli, G. Sangiovanni, B. Trauzettel, and M. Capone We investigate the emergence of antiferromagnetic ordering and its effect on the helical edge states in a quantum spin Hall insulator, in the presence of strong Coulomb interaction. Using dynamical mean-field theory, we show that the breakdown of lattice translational symmetry favors the formation o... [Phys. Rev. B 98, 045133] Published Tue Jul 24, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Triply degenerate nodal points in $R{\mathrm{Rh}}_{6}{\mathrm{Ge}}_{4}\phantom{\rule{4pt}{0ex}}(R=\text{Y},\text{La},\text{Lu})$ (2018)

Peng-Jie Guo, Huan-Cheng Yang, Kai Liu, and Zhong-Yi Lu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Peng-Jie Guo, Huan-Cheng Yang, Kai Liu, and Zhong-Yi Lu As a type of fermions without counterpart in high energy physics, triply degenerate fermions show exotic physical properties, which are represented by triply degenerate nodal points in topological semimetals. Here, based on the space group theory analysis, we propose a practical guidance for seeking... [Phys. Rev. B 98, 045134] Published Tue Jul 24, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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17

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Berry phase of the composite-fermion Fermi sea: Effect of Landau-level mixing (2018)

Songyang Pu, Mikael Fremling, and J. K. Jain

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-04

Beschreibung: Author(s): Songyang Pu, Mikael Fremling, and J. K. Jain We construct explicit lowest-Landau-level wave functions for the composite-fermion Fermi sea and its low-energy excitations following a recently developed approach [Pu, Wu, and Jain, Phys. Rev. B 96 , 195302 (2017) ] and demonstrate them to be very accurate representations of the Coulomb eigenstates. ... [Phys. Rev. B 98, 075304] Published Fri Aug 03, 2018

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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18

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Electronic structure theory of strained two-dimensional materials with hexagonal symmetry (2018)

Shiang Fang, Stephen Carr, Miguel A. Cazalilla, and Efthimios Kaxiras

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Shiang Fang, Stephen Carr, Miguel A. Cazalilla, and Efthimios Kaxiras We derive electronic tight-binding Hamiltonians for strained graphene, hexagonal boron nitride, and transition-metal dichalcogenides based on Wannier transformation of ab initio density functional theory calculations. Our microscopic models include strain effects to leading order that respect the he... [Phys. Rev. B 98, 075106] Published Mon Aug 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Swift $GW$ beyond 10,000 electrons using sparse stochastic compression (2018)

Vojtěch Vlček, Wenfei Li, Roi Baer, Eran Rabani, and Daniel Neuhauser

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Vojtěch Vlček, Wenfei Li, Roi Baer, Eran Rabani, and Daniel Neuhauser We introduce the concept of sparse stochastic compression, an efficient stochastic sampling of any general function. The technique uses sparse stochastic orbitals (SSOs), short vectors that sample a small number of space points. As a first demonstration, SSOs are applied in conjunction with simple d... [Phys. Rev. B 98, 075107] Published Mon Aug 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Constrained density functional theory calculation with iterative optimization (2018)

Daniel Kidd, A. S. Umar, and Kálmán Varga

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Daniel Kidd, A. S. Umar, and Kálmán Varga An iterative optimization approach that simultaneously minimizes the energy and optimizes the Lagrange multipliers enforcing desired constraints is presented. The method is tested on previously established benchmark systems and it is proved to be efficient and accurate. The approach can also be effi... [Phys. Rev. B 98, 075108] Published Mon Aug 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Triangular antiferromagnetism on the honeycomb lattice of twisted bilayer graphene (2018)

Alex Thomson, Shubhayu Chatterjee, Subir Sachdev, and Mathias S. Scheurer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Alex Thomson, Shubhayu Chatterjee, Subir Sachdev, and Mathias S. Scheurer We present the electronic band structures of states with the same symmetry as the three-sublattice planar antiferromagnetic order of the triangular lattice. Such states can also be defined on the honeycomb lattice provided the spin density waves lie on the bonds. We identify cases which are consiste... [Phys. Rev. B 98, 075109] Published Mon Aug 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Atomization of correlated molecular-hydrogen chain: A fully microscopic variational Monte Carlo solution (2018)

Andrzej Biborski, Andrzej P. Kądzielawa, and Józef Spałek

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): Andrzej Biborski, Andrzej P. Kądzielawa, and Józef Spałek We discuss electronic properties and their evolution for the linear chain of H 2 molecules in the presence of a uniform external force f acting along the chain. The system is described by an extended Hubbard model within a fully microscopic approach . Explicitly, the microscopic parameters describing ... [Phys. Rev. B 98, 085112] Published Tue Aug 07, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Dynamic symmetry breaking and spin splitting in metal halide perovskites (2018)

Scott McKechnie, Jarvist M. Frost, Dimitar Pashov, Pooya Azarhoosh, Aron Walsh, and Mark van Schilfgaarde

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Scott McKechnie, Jarvist M. Frost, Dimitar Pashov, Pooya Azarhoosh, Aron Walsh, and Mark van Schilfgaarde Metal halide perovskites exhibit a materials physics that is distinct from traditional semiconductors. While materials such as CH 3 NH 3 PbI 3 are nonmagnetic, the presence of heavy elements (Pb and I) in a noncentrosymmetric crystal environment result in a spin splitting of the frontier electronic bands... [Phys. Rev. B 98, 085108] Published Mon Aug 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Epsilon-near-zero response and tunable perfect absorption in Weyl semimetals (2018)

Klaus Halterman, Mohammad Alidoust, and Alexander Zyuzin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Klaus Halterman, Mohammad Alidoust, and Alexander Zyuzin We theoretically study the electromagnetic response of type-I and type-II centrosymmetric Weyl metals. We derive an anisotropic permittivity tensor with off-diagonal elements to describe such gyrotropic media. Our findings reveal that for appropriate Weyl cones tilts, the real part of the transverse... [Phys. Rev. B 98, 085109] Published Mon Aug 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Coupled wire model of ${Z}_{4}$ orbifold quantum Hall states (2018)

Charles L. Kane and Ady Stern

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Charles L. Kane and Ady Stern We introduce a coupled wire model for a sequence of non-Abelian quantum Hall states that generalize the Z 4 parafermion Read-Rezayi state. The Z 4 orbifold quantum Hall states occur at filling factors ν = 2 / ( 2 m − p ) for odd integers m and p , and have a topological order with a neutral sector characterized... [Phys. Rev. B 98, 085302] Published Mon Aug 06, 2018

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Unusual layered order and charge disproportionation in the double-perovskite compound ${\mathrm{Ca}}_{2}{\mathrm{FeMnO}}_{6}$ (2018)

Ke Yang, D. I. Khomskii, and Hua Wu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-07

Beschreibung: Author(s): Ke Yang, D. I. Khomskii, and Hua Wu While double perovskites A 2 B B ′ O 6 , if ordered, usually form a rock-salt–type structure with a checkerboard B − B ′ ordering, it is surprising that Ca 2 FeMnO 6 has alternate FeO 2 and MnO 2 layers in its perovskite structure. Here, by using density functional calculations, we demonstrate that this unusual la... [Phys. Rev. B 98, 085105] Published Mon Aug 06, 2018

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Long-range Coulomb interaction effects on the topological phase transitions between semimetals and insulators (2018)

Sang; Eun Han and Eun-Gook Moon

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): SangEun Han and Eun-Gook Moon Topological states may be protected by a lattice symmetry in a class of topological semimetals. In three spatial dimensions, the Berry flux around gapless excitations in momentum space concretely defines a chirality, so a protecting symmetry may be referred to as a chiral symmetry. Prime examples in... [Phys. Rev. B 97, 241101(R)] Published Mon Jun 04, 2018

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Current-induced spin polarization in the isotropic $k$-cubed Rashba model: Theoretical study of $p$-doped semiconductor heterostructures and perovskite-oxide interfaces (2018)

Ł. Karwacki, A. Dyrdał, J. Berakdar, and J. Barnaś

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-05

Beschreibung: Author(s): Ł. Karwacki, A. Dyrdał, J. Berakdar, and J. Barnaś Using the Matsubara Green's function formalism, we calculate the temperature dependence of the nonequilibrium spin polarization induced by an external electric field in the presence of spin-orbit coupling. The model Hamiltonian includes an isotropic k -cubed form of the Rashba spin-orbit interaction.... [Phys. Rev. B 97, 235302] Published Mon Jun 04, 2018

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Multiple phases with intertwined magnetic and superconducting orders in Nd-doped ${\mathrm{CeCoIn}}_{5}$ (2018)

Duk Y. Kim, Shi-Zeng Lin, Franziska Weickert, P. F. S. Rosa, Eric D. Bauer, Filip Ronning, J. D. Thompson, and Roman Movshovich

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-14

Beschreibung: Author(s): Duk Y. Kim, Shi-Zeng Lin, Franziska Weickert, P. F. S. Rosa, Eric D. Bauer, Filip Ronning, J. D. Thompson, and Roman Movshovich The thermal conductivity of heavy-fermion superconductor Ce 0.95 Nd 0.05 CoIn 5 was measured with a magnetic field rotating in the tetragonal a − b plane. The thermal conductivity exhibits a step within the high-field low-temperature (HFLT) phase, which exists above 8 Tesla within the superconducting state... [Phys. Rev. B 97, 245120] Published Wed Jun 13, 2018

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Photoinduced Hund excitons in the breakdown of a two-orbital Mott insulator (2018)

Julián Rincón, Elbio Dagotto, and Adrian E. Feiguin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Julián Rincón, Elbio Dagotto, and Adrian E. Feiguin We study the photoinduced breakdown of a two-orbital Mott insulator and resulting metallic state. Using time-dependent density matrix renormalization group, we scrutinize the real-time dynamics of the half-filled two-orbital Hubbard model interacting with a resonant radiation field pulse. The breakd... [Phys. Rev. B 97, 235104] Published Tue Jun 05, 2018

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Positronium formation at Si surfaces (2018)

A. Kawasuso, M. Maekawa, A. Miyashita, K. Wada, T. Kaiwa, and Y. Nagashima

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): A. Kawasuso, M. Maekawa, A. Miyashita, K. Wada, T. Kaiwa, and Y. Nagashima Positronium formation at Si(111) and Si(001) surfaces has been investigated by changing the doping level systematically over the range 300–1000 K. The temperature dependence of the positronium fraction varied with the doping condition, and there were practically no differences between the two surfac... [Phys. Rev. B 97, 245303] Published Tue Jun 05, 2018

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Turning copper metal into a Weyl semimetal (2018)

Yongping Du, Er-jun Kan, Hu Xu, Sergey Y. Savrasov, and Xiangang Wan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-06

Beschreibung: Author(s): Yongping Du, Er-jun Kan, Hu Xu, Sergey Y. Savrasov, and Xiangang Wan A search for new topological quantum systems is challenging due to the requirement of nontrivial band connectivity that leads to protected surface states of electrons. Progress in this field was primarily due to a realization of a band inversion mechanism between even and odd parity states that was ... [Phys. Rev. B 97, 245104] Published Tue Jun 05, 2018

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Robust non-Abelian spin liquid and a possible intermediate phase in the antiferromagnetic Kitaev model with magnetic field (2018)

Zheng Zhu, Itamar Kimchi, D. N. Sheng, and Liang Fu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Zheng Zhu, Itamar Kimchi, D. N. Sheng, and Liang Fu We investigate the non-Abelian topological chiral spin-liquid phase in the two-dimensional Kitaev honeycomb model subject to a magnetic field. By combining density matrix renormalization group and exact diagonalization we study the energy spectra, entanglement, topological degeneracy, and expectatio... [Phys. Rev. B 97, 241110(R)] Published Fri Jun 15, 2018

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Quantum entanglement of the Sachdev-Ye-Kitaev models (2018)

Chunxiao Liu, Xiao Chen, and Leon Balents

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-16

Beschreibung: Author(s): Chunxiao Liu, Xiao Chen, and Leon Balents The Sachdev-Ye-Kitaev (SYK) model is a quantum-mechanical model of fermions interacting with q -body random couplings. For q = 2 , it describes free particles and is nonchaotic in the many-body sense, while for q 〉 2 it is strongly interacting and exhibits many-body chaos. In this work we study the ent... [Phys. Rev. B 97, 245126] Published Fri Jun 15, 2018

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Dynamical density matrix renormalization group study of spin and charge excitations in the four-leg $t\text{−}{t}^{′}\text{−}J$ ladder (2018)

Takami Tohyama, Michiyasu Mori, and Shigetoshi Sota

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-22

Beschreibung: Author(s): Takami Tohyama, Michiyasu Mori, and Shigetoshi Sota The ground state of the t − t ′ − J ladder with four legs favors a striped charge distribution for the parameters corresponding to hole-doped cuprate superconductors. We investigate the dynamical spin and charge structure factors of the model by using the dynamical density matrix renormalization group (D... [Phys. Rev. B 97, 235137] Published Thu Jun 21, 2018

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Efficient Bethe-Salpeter equation treatment in dynamical mean-field theory (2018)

Agnese Tagliavini, Stefan Hummel, Nils Wentzell, Sabine Andergassen, Alessandro Toschi, and Georg Rohringer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): Agnese Tagliavini, Stefan Hummel, Nils Wentzell, Sabine Andergassen, Alessandro Toschi, and Georg Rohringer We present here two alternative schemes designed to correct the high-frequency truncation errors in the numerical treatment of the Bethe-Salpeter equations. The schemes are applicable to all Bethe-Salpeter calculations with a local two-particle irreducible vertex, which is relevant, e.g., for the dy... [Phys. Rev. B 97, 235140] Published Fri Jun 22, 2018

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Dynamical localization in ${ℤ}_{2}$ lattice gauge theories (2018)

Adam Smith, Johannes Knolle, Roderich Moessner, and Dmitry L. Kovrizhin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-23

Beschreibung: Author(s): Adam Smith, Johannes Knolle, Roderich Moessner, and Dmitry L. Kovrizhin We study quantum quenches in two-dimensional lattice gauge theories with fermions coupled to dynamical Z 2 gauge fields. Through the identification of an extensive set of conserved quantities, we propose a generic mechanism of charge localization in the absence of quenched disorder both in the Hamilt... [Phys. Rev. B 97, 245137] Published Fri Jun 22, 2018

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Electronic structure of FeO, $γ−{\mathrm{Fe}}_{2}{\mathrm{O}}_{3}$, and ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ epitaxial films using high-energy spectroscopies (2018)

Juan Rubio-Zuazo, Ashish Chainani, Munetaka Taguchi, Daniel Malterre, Aida Serrano, and German R. Castro

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-28

Beschreibung: Author(s): Juan Rubio-Zuazo, Ashish Chainani, Munetaka Taguchi, Daniel Malterre, Aida Serrano, and German R. Castro We study the electronic structure of well-characterized epitaxial films of FeO (wustite), γ − Fe 2 O 3 (maghemite), and Fe 3 O 4 (magnetite) using hard x-ray photoelectron spectroscopy (HAXPES), x-ray absorption near-edge spectroscopy (XANES), and electron energy loss spectroscopy (EELS). We carry out HAXPE... [Phys. Rev. B 97, 235148] Published Wed Jun 27, 2018

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Temperature versus Sm concentration phase diagram and quantum criticality in the correlated electron system ${\mathrm{Ce}}_{1−x}{\mathrm{Sm}}_{x}{\mathrm{CoIn}}_{5}$ (2018)

N. Pouse, S. Jang, B. D. White, S. Ran, R. B. Adhikari, C. C. Almasan, and M. B. Maple

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-29

Beschreibung: Author(s): N. Pouse, S. Jang, B. D. White, S. Ran, R. B. Adhikari, C. C. Almasan, and M. B. Maple We report electrical resistivity, magnetization, and specific heat measurements on the correlated electron system Ce 1 − x Sm x CoIn 5 ( 0 ≤ x ≤ 1 ). Superconductivity (SC) in the heavy-fermion compound CeCoIn 5 , which is suppressed with increasing Sm concentration x , and antiferromagnetic (AFM) order of SmCoIn 5 ,... [Phys. Rev. B 97, 235149] Published Thu Jun 28, 2018

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Phase diagram of the Hubbard-Kondo lattice model from the variational cluster approximation (2018)

J. P. L. Faye, M. N. Kiselev, P. Ram, B. Kumar, and D. Sénéchal

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-06-29

Beschreibung: Author(s): J. P. L. Faye, M. N. Kiselev, P. Ram, B. Kumar, and D. Sénéchal The interplay between the Kondo effect and magnetic ordering driven by the Ruderman-Kittel-Kasuya-Yosida interaction is studied within the two-dimensional Hubbard-Kondo lattice model. In addition to the antiferromagnetic exchange interaction J ⊥ between the localized spins and the conduction electron... [Phys. Rev. B 97, 235151] Published Thu Jun 28, 2018

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Disordered fermionic quantum critical points (2018)

Hennadii Yerzhakov and Joseph Maciejko

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-01

Beschreibung: Author(s): Hennadii Yerzhakov and Joseph Maciejko We study the effect of quenched disorder on the semimetal-superconductor quantum phase transition in a model of two-dimensional Dirac semimetal with N flavors of two-component Dirac fermions, using perturbative renormalization group methods at one-loop order in a double epsilon expansion. For N ≥ 2 we... [Phys. Rev. B 98, 195142] Published Fri Nov 30, 2018

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Origin of the current-driven breakdown in vanadium oxides: Thermal versus electronic (2018)

I. Valmianski, P. Y. Wang, S. Wang, Juan Gabriel Ramirez, S. Guénon, and Ivan K. Schuller

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-01

Beschreibung: Author(s): I. Valmianski, P. Y. Wang, S. Wang, Juan Gabriel Ramirez, S. Guénon, and Ivan K. Schuller We report the existence of two competing mechanisms in the current-driven electrical breakdown of vanadium sesquioxide ( V 2 O 3 ) and vanadium dioxide ( V O 2 ) nanodevices. Our experiments and simulations show that the competition between a purely electronic (PE) mechanism and an electrothermal (ET) mechan... [Phys. Rev. B 98, 195144] Published Fri Nov 30, 2018

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Valence transition model of the pseudogap, charge order, and superconductivity in electron-doped and hole-doped copper oxides (2018)

Sumit Mazumdar

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-01

Beschreibung: Author(s): Sumit Mazumdar We present a valence transition model for electron- and hole-doped cuprates, within which there occurs a discrete jump in ionicity Cu 2 + → Cu 1 + in both families upon doping, at or near optimal doping in the conventionally prepared electron-doped compounds and at the pseudogap phase transition in the ho... [Phys. Rev. B 98, 205153] Published Fri Nov 30, 2018

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Dirac nodal lines and flat-band surface state in the functional oxide ${\mathrm{RuO}}_{2}$ (2018)

Vedran Jovic, Roland J. Koch, Swarup K. Panda, Helmuth Berger, Philippe Bugnon, Arnaud Magrez, Kevin E. Smith, Silke Biermann, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, and Simon Moser

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Vedran Jovic, Roland J. Koch, Swarup K. Panda, Helmuth Berger, Philippe Bugnon, Arnaud Magrez, Kevin E. Smith, Silke Biermann, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, and Simon Moser The efficiency and stability of RuO 2 in electrocatalysis has made this material a subject of intense fundamental and industrial interest. The surface functionality is rooted in its electronic and magnetic properties, determined by a complex interplay of lattice-, spin-rotational, and time-reversal s... [Phys. Rev. B 98, 241101(R)] Published Mon Dec 03, 2018

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Exact results for a ${\mathbb{Z}}_{3}$-clock-type model and some close relatives (2018)

Iman Mahyaeh and Eddy Ardonne

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Iman Mahyaeh and Eddy Ardonne In this paper, we generalized the Peschel-Emery line of the interacting transverse field Ising model to a model based on three-state clock variables. Along this line, the model has exactly degenerate ground states, which can be written as product states. In addition, we present operators that transf... [Phys. Rev. B 98, 245104] Published Mon Dec 03, 2018

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Coherent and incoherent bands in La and Rh doped ${\mathrm{Sr}}_{3}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ (2018)

V. Brouet, L. Serrier-Garcia, A. Louat, L. Fruchter, F. Bertran, P. Le Fèvre, J. Rault, A. Forget, and D. Colson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): V. Brouet, L. Serrier-Garcia, A. Louat, L. Fruchter, F. Bertran, P. Le Fèvre, J. Rault, A. Forget, and D. Colson In Sr 2 IrO 4 and Sr 3 Ir 2 O 7 , correlations, magnetism, and spin-orbit coupling compete on similar energy scales, creating a new context to study metal-insulator transitions (MIT). We use here angle-resolved photoemission to investigate the MIT as a function of hole and electron doping in Sr 3 Ir 2 O 7 , obtain... [Phys. Rev. B 98, 235101] Published Mon Dec 03, 2018

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Self-energy dispersion in the Hubbard model (2018)

Thomas Mertz, Karim Zantout, and Roser Valentí

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Thomas Mertz, Karim Zantout, and Roser Valentí We introduce the concept of self-energy dispersion as an error bound on local theories and apply it to the two-dimensional Hubbard model on the square lattice at half filling. Since the self-energy has no single-particle analog and is not directly measurable in experiments, its general behavior as a... [Phys. Rev. B 98, 235105] Published Mon Dec 03, 2018

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Analytical investigation of singularities in two-particle irreducible vertex functions of the Hubbard atom (2018)

P. Thunström, O. Gunnarsson, Sergio Ciuchi, and G. Rohringer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): P. Thunström, O. Gunnarsson, Sergio Ciuchi, and G. Rohringer The local two-particle Green’s function and its generalized susceptibility are central building blocks in state-of-the-art theoretical descriptions of strongly correlated many-electron systems. The unexpected discovery of singular points in the generalized susceptibility, resulting in divergences of the two-particle irreducible vertex function and in multivaluedness of the Luttinger-Ward functional, has therefore attracted considerable interest. Unfortunately, almost no analytical results for irreducible vertices are available for correlated electrons. Here, the authors fill this gap by presenting fully analytical expressions for all irreducible vertex function of a simple, yet prototypical, correlated model, the single-orbital Hubbard atom. This gives highly relevant insights into the energy dependence of these functions. [Phys. Rev. B 98, 235107] Published Mon Dec 03, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Inversion-symmetry protected chiral hinge states in stacks of doped quantum Hall layers (2018)

Sander H. Kooi, Guido van Miert, and Carmine Ortix

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Sander H. Kooi, Guido van Miert, and Carmine Ortix We prove the existence of higher-order topological insulators with protected chiral hinge modes in quasi-two-dimensional systems made out of coupled layers stacked in an inversion-symmetric manner. In particular, we show that a homogeneous external magnetic field slightly tilted away from the stacki... [Phys. Rev. B 98, 245102] Published Mon Dec 03, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Correlations and electronic order in a two-orbital honeycomb lattice model for twisted bilayer graphene (2018)

Jörn W. F. Venderbos and Rafael M. Fernandes

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Jörn W. F. Venderbos and Rafael M. Fernandes The recent observation of superconductivity in proximity to an insulating phase in twisted bilayer graphene (TBG) at small “magic” twist angles has been linked to the existence of nearly flat bands, which make TBG a fresh playground to investigate the interplay between correlations and superconducti... [Phys. Rev. B 98, 245103] Published Mon Dec 03, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Analytic continuation via domain knowledge free machine learning (2018)

Hongkee Yoon, Jae-Hoon Sim, and Myung Joon Han

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-04

Beschreibung: Author(s): Hongkee Yoon, Jae-Hoon Sim, and Myung Joon Han We present a machine-learning approach to a long-standing issue in quantum many-body physics, namely, analytic continuation. This notorious ill-conditioned problem of obtaining spectral function from an imaginary time Green's function has been a focus of new method developments for past decades. Her... [Phys. Rev. B 98, 245101] Published Mon Dec 03, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Topological crystalline insulator states in the ${\mathrm{Ca}}_{2}\mathrm{As}$ family (2018)

Xiaoting Zhou, Chuang-Han Hsu, Tay-Rong Chang, Hung-Ju Tien, Qiong Ma, Pablo Jarillo-Herrero, Nuh Gedik, Arun Bansil, Vitor M. Pereira, Su-Yang Xu, Hsin Lin, and Liang Fu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-05

Beschreibung: Author(s): Xiaoting Zhou, Chuang-Han Hsu, Tay-Rong Chang, Hung-Ju Tien, Qiong Ma, Pablo Jarillo-Herrero, Nuh Gedik, Arun Bansil, Vitor M. Pereira, Su-Yang Xu, Hsin Lin, and Liang Fu Topological crystalline insulators (TCIs) are insulating electronic phases of matter with nontrivial topology originating from crystalline symmetries. Recent theoretical advances have proposed new TCI states protected by rotational symmetries and provided powerful guidelines to search for TCIs in re... [Phys. Rev. B 98, 241104(R)] Published Tue Dec 04, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Visualizing topological edge states of single and double bilayer Bi supported on multibilayer Bi(111) films (2018)

Lang Peng, Jing-Jing Xian, Peizhe Tang, Angel Rubio, Shou-Cheng Zhang, Wenhao Zhang, and Ying-Shuang Fu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Lang Peng, Jing-Jing Xian, Peizhe Tang, Angel Rubio, Shou-Cheng Zhang, Wenhao Zhang, and Ying-Shuang Fu Freestanding single bilayer Bi(111) is a two-dimensional topological insulator with edge states propagating along its perimeter. Given the interlayer coupling experimentally, the topological nature of Bi(111) thin films and the impact of the supporting substrate on the topmost Bi bilayer are still u... [Phys. Rev. B 98, 245108] Published Wed Dec 05, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Anomalous behavior of the electronic structure of (${\mathrm{Bi}}_{1−x}{\mathrm{In}}_{x}{)}_{2}{\mathrm{Se}}_{3}$ across the quantum phase transition from topological to trivial insulator (2018)

J. Sánchez-Barriga, I. Aguilera, L. V. Yashina, D. Y. Tsukanova, F. Freyse, A. N. Chaika, C. Callaert, A. M. Abakumov, J. Hadermann, A. Varykhalov, E. D. L. Rienks, G. Bihlmayer, S. Blügel, and O. Rader

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): J. Sánchez-Barriga, I. Aguilera, L. V. Yashina, D. Y. Tsukanova, F. Freyse, A. N. Chaika, C. Callaert, A. M. Abakumov, J. Hadermann, A. Varykhalov, E. D. L. Rienks, G. Bihlmayer, S. Blügel, and O. Rader The authors investigate the electronic and spin structure of topological surface states across a topological quantum phase transition. They find a surface band gap opening at the Dirac point of the topological surface states, giving rise to massive fermions with nonzero spin polarization on both sides of the phase transition. A mechanism of bulk-mediated scattering processes that increase with decreasing spin-orbit coupling strength is proposed as an explanation for the problem of the unconventional transformation between spin Dirac phases. [Phys. Rev. B 98, 235110] Published Wed Dec 05, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Weyl disks: Theoretical prediction (2018)

Janis Erdmanis, Árpád Lukács, and Yuli V. Nazarov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-06

Beschreibung: Author(s): Janis Erdmanis, Árpád Lukács, and Yuli V. Nazarov A variety of quantum systems exhibit Weyl points in their spectra where two bands cross in a point of three-dimensional parameter space with conical dispersion in the vicinity of the point. We consider theoretically the soft constraint regime where the parameters are dynamical quantum variables. We ... [Phys. Rev. B 98, 241105(R)] Published Wed Dec 05, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Quantum behavior of hydrogen-vacancy complexes in diamond (2018)

Kamil Czelej, Marcin Roland Zemła, Piotr Śpiewak, and Krzysztof J. Kurzydłowski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): Kamil Czelej, Marcin Roland Zemła, Piotr Śpiewak, and Krzysztof J. Kurzydłowski Hydrogen plays an essential role in the growth process of artificial diamond and can easily form complexes with lattice vacancies. Despite substantial efforts to resolve the electronic structure and the ground-state properties of the hydrogen-vacancy (HV) center, the final remarks are ambiguous, whi... [Phys. Rev. B 98, 235111] Published Thu Dec 06, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Finite-wave-vector electromagnetic response in lattice quantum Hall systems (2018)

Fenner Harper, David Bauer, T. S. Jackson, and Rahul Roy

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-07

Beschreibung: Author(s): Fenner Harper, David Bauer, T. S. Jackson, and Rahul Roy In a quantum Hall system, the finite-wave-vector Hall conductivity displays an intriguing dependence on the Hall viscosity. Here, the authors study this connection for quantum Hall systems on a lattice and find that the neat continuum relation breaks down. In the process, they introduce a universal formalism for studying lattice quantum Hall systems and find that, in the low flux density limit, generic lattice wave functions connect smoothly to the Landau levels of the continuum. They also introduce a quantum mechanical method for calculating the electromagnetic response of such systems. [Phys. Rev. B 98, 245303] Published Thu Dec 06, 2018

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Generation of multiple plasmons in strontium niobates mediated by local field effects (2018)

Tao Zhu, Paolo E. Trevisanutto, Teguh Citra Asmara, Lei Xu, Yuan Ping Feng, and Andrivo Rusydi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-08

Beschreibung: Author(s): Tao Zhu, Paolo E. Trevisanutto, Teguh Citra Asmara, Lei Xu, Yuan Ping Feng, and Andrivo Rusydi Recently, an anomalous generation of multiple plasmons with large spectral weight transfer in the visible to ultraviolet range (energies below the band gap) has been experimentally observed in the insulatinglike phase of oxygen-rich strontium niobium oxides ( SrNbO 3 + δ ). Here, we investigate the groun... [Phys. Rev. B 98, 235115] Published Fri Dec 07, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Nonequilibrium electron dynamics in pump-probe spectroscopy: Role of excited phonon populations (2018)

O. Abdurazakov, D. Nevola, A. Rustagi, J. K. Freericks, D. B. Dougherty, and A. F. Kemper

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-08

Beschreibung: Author(s): O. Abdurazakov, D. Nevola, A. Rustagi, J. K. Freericks, D. B. Dougherty, and A. F. Kemper We study the role of excited phonon populations in the relaxation rates of nonequilibrium electrons using a nonequilibrium Green's function formalism. The transient modifications in the phononic properties are accounted for by self-consistently solving the Dyson equation for the electron and phonon ... [Phys. Rev. B 98, 245110] Published Fri Dec 07, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Classification of subsystem symmetry-protected topological phases (2018)

Trithep Devakul, Dominic J. Williamson, and Yizhi You

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Trithep Devakul, Dominic J. Williamson, and Yizhi You We consider symmetry-protected topological (SPT) phases in two dimensions protected by linear subsystem symmetries, i.e., those that act along rigid lines. There is a distinction between a “strong” subsystem SPT phase and a “weak” one, which is composed of decoupled one-dimensional SPTs with global ... [Phys. Rev. B 98, 235121] Published Mon Dec 10, 2018

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Universal quantum criticality at finite temperature for two-dimensional disordered and clean dimerized spin-$\frac{1}{2}$ antiferromagnets (2018)

D.-R. Tan and F.-J. Jiang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): D.-R. Tan and F.-J. Jiang The quantum critical regimes (QCR) of both a two-dimensional (2D) disordered spin- 1 2 antiferromagnet and a 2D clean dimerized quantum Heisenberg model are studied using the first-principles nonperturbative quantum Monte Carlo simulations. In particular, the three well-known universal coefficients as... [Phys. Rev. B 98, 245111] Published Mon Dec 10, 2018

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Spectroscopy and level detuning of few-electron spin states in parallel InAs quantum dots (2018)

Claes Thelander, Malin Nilsson, Florinda Viñas Boström, Adam Burke, Sebastian Lehmann, Kimberly A. Dick, and Martin Leijnse

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-11

Beschreibung: Author(s): Claes Thelander, Malin Nilsson, Florinda Viñas Boström, Adam Burke, Sebastian Lehmann, Kimberly A. Dick, and Martin Leijnse We use tunneling spectroscopy to study the evolution of few-electron spin states in parallel InAs nanowire double quantum dots (QDs) as a function of level detuning and applied magnetic field. Compared to the much more studied serial configuration, parallel coupling of the QDs to source and drain gr... [Phys. Rev. B 98, 245305] Published Mon Dec 10, 2018

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Orbital currents in insulating and doped antiferromagnets (2018)

Mathias S. Scheurer and Subir Sachdev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-12

Beschreibung: Author(s): Mathias S. Scheurer and Subir Sachdev We describe square lattice spin liquids, which break time-reversal symmetry, while preserving translational symmetry. The states are distinguished by the manner in which they transform under mirror symmetries. All the states have nonzero scalar spin chirality, which implies the appearance of spontan... [Phys. Rev. B 98, 235126] Published Tue Dec 11, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Electronic structure and x-ray magnetic circular dichroism in the hyperhoneycomb iridate $β\text{−}{\mathrm{Li}}_{2}{\mathrm{IrO}}_{3}$ (2018)

V. N. Antonov, S. Uba, and L. Uba

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-12

Beschreibung: Author(s): V. N. Antonov, S. Uba, and L. Uba We studied the electronic, magnetic, and optical properties of β − Li 2 IrO 3 insulator within the density-functional theory using the generalized gradient approximation taking into account strong Coulomb correlations (GGA+ U ) in the framework of the fully relativistic spin-polarized Dirac linear muffin-t... [Phys. Rev. B 98, 245113] Published Tue Dec 11, 2018

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Anisotropic charge density wave in electron-hole double monolayers: Applied to phosphorene (2018)

S. Saberi-Pouya, M. Zarenia, T. Vazifehshenas, and F. M. Peeters

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-12-13

Beschreibung: Author(s): S. Saberi-Pouya, M. Zarenia, T. Vazifehshenas, and F. M. Peeters The possibility of an inhomogeneous charge density wave phase is investigated in a system of two coupled electron and hole monolayers separated by a hexagonal boron nitride insulating layer. The charge-density-wave state is induced through the assumption of negative compressibility of electron/hole ... [Phys. Rev. B 98, 245115] Published Wed Dec 12, 2018

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Thermal plasmon resonantly enhances electron scattering in Dirac/Weyl semimetals (2018)

Vladyslav Kozii and Liang Fu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Vladyslav Kozii and Liang Fu We study the inelastic scattering rate due to the Coulomb interaction in three-dimensional Dirac/Weyl semimetals at finite temperature. We show that the perturbation theory diverges because of the long-range nature of the interaction, hence, thermally induced screening must be taken into account. We... [Phys. Rev. B 98, 041109(R)] Published Tue Jul 24, 2018

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Electron spin noise under the conditions of nuclei-induced frequency focusing (2018)

Natalie Jäschke, Frithjof B. Anders, and Mikhail M. Glazov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-07-25

Beschreibung: Author(s): Natalie Jäschke, Frithjof B. Anders, and Mikhail M. Glazov We study theoretically the electron spin noise in quantum dots under nonequilibrium conditions caused by the pumping by a train of circularly polarized optical pulses. In such a situation, the nuclear spins are known to adjust in such a way that the electron spin precession frequencies become multip... [Phys. Rev. B 98, 045307] Published Tue Jul 24, 2018

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Interplay of lattice, electronic, and spin degrees of freedom in detwinned ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$: A Raman scattering study (2018)

A. Baum, Ying Li, M. Tomić, N. Lazarević, D. Jost, F. Löffler, B. Muschler, T. Böhm, J.-H. Chu, I. R. Fisher, R. Valentí, I. I. Mazin, and R. Hackl

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): A. Baum, Ying Li, M. Tomić, N. Lazarević, D. Jost, F. Löffler, B. Muschler, T. Böhm, J.-H. Chu, I. R. Fisher, R. Valentí, I. I. Mazin, and R. Hackl We report results of Raman scattering experiments on twin-free BaFe 2 As 2 with the main focus placed on understanding the influence of electronic and spin degrees of freedom on the lattice dynamics. In particular, we scrutinize the E g modes and the As A 1 g mode. Each of the two E g phonons in the tetrag... [Phys. Rev. B 98, 075113] Published Tue Aug 07, 2018

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Collective electronic excitations in Ti and Zr and their dihydrides (2018)

I. V. Silkin, I. P. Chernov, V. M. Silkin, and E. V. Chulkov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): I. V. Silkin, I. P. Chernov, V. M. Silkin, and E. V. Chulkov Electron excitation spectra in Ti and Zr transition metals are calculated in the framework of time-dependent density functional theory. Several peaks found in the obtained loss functions are interpreted as collective excitations. The energy positions of the dominating bulk plasmons are in close agre... [Phys. Rev. B 98, 075111] Published Tue Aug 07, 2018

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Cross-entangling electronic and nuclear spins of distant nitrogen-vacancy centers in noisy environments by means of quantum microwave radiation (2018)

A. Viviana Gómez, Ferney J. Rodríguez, and Luis Quiroga

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): A. Viviana Gómez, Ferney J. Rodríguez, and Luis Quiroga Nitrogen-vacancy (NV) defect centers in diamond are strong candidates to generate entangled states in solid-state environments even at room temperature. Quantum correlations in spatially separated NV systems, for distances between NVs ranging from a few nanometers to a few kilometers, have been rece... [Phys. Rev. B 98, 075114] Published Tue Aug 07, 2018

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Large entropy change derived from orbitally assisted three-centered two-electron $σ$ bond formation in metallic ${\mathrm{Li}}_{0.33}{\mathrm{VS}}_{2}$ (2018)

N. Katayama, S. Tamura, T. Yamaguchi, K. Sugimoto, K. Iida, T. Matsukawa, A. Hoshikawa, T. Ishigaki, S. Kobayashi, Y. Ohta, and H. Sawa

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-08

Beschreibung: Author(s): N. Katayama, S. Tamura, T. Yamaguchi, K. Sugimoto, K. Iida, T. Matsukawa, A. Hoshikawa, T. Ishigaki, S. Kobayashi, Y. Ohta, and H. Sawa We discuss herein the emergence of a large entropy change in metallic Li 0.33 VS 2 derived from orbitally assisted loose σ bond formation. Comprehensive structural studies based on synchrotron x-ray and neutron diffraction analyses clarify the fabrication of ribbon chains at 375 K, consisting of multip... [Phys. Rev. B 98, 081104(R)] Published Tue Aug 07, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Observation of two critical points linked to the high-field phase B in ${\mathrm{CeCu}}_{2}{\mathrm{Si}}_{2}$ (2018)

Franziska Weickert, Philipp Gegenwart, Christoph Geibel, Wolf Assmus, and Frank Steglich

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Franziska Weickert, Philipp Gegenwart, Christoph Geibel, Wolf Assmus, and Frank Steglich We present thermal expansion and magnetostriction measurements on a CeCu 2 Si 2 single crystal of A/S type up to 17.9 T magnetic field applied along the crystallographic a direction ( Δ L ∥ a ∥ H ) and down to 0.015 K temperature. We identify clear thermodynamic anomalies at the superconducting transition T c ... [Phys. Rev. B 98, 085115] Published Wed Aug 08, 2018

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Parity-time-symmetric topological superconductor (2018)

Kohei Kawabata, Yuto Ashida, Hosho Katsura, and Masahito Ueda

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Kohei Kawabata, Yuto Ashida, Hosho Katsura, and Masahito Ueda Nonequilibrium open systems effectively described by non-Hermitian Hamiltonians with parity-time ( P T ) symmetry have recently attracted considerable attention due to their properties with no Hermitian counterparts. In particular, there exists a growing interest in non-Hermitian topological phases of matter. Here, the authors show that a P T -symmetric topological superconducting wire possesses two distinct types of unconventional edge modes, those with complex energies and with nonorthogonal Majorana zero modes. The latter induce anomalous particle transport with nonlocal currents present only at the edges. This work explores a unique nonequilibrium topological phenomenon that results from the interplay between P T symmetry and topological superconductivity. [Phys. Rev. B 98, 085116] Published Wed Aug 08, 2018

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Smeared nematic quantum phase transitions due to rare-region effects in inhomogeneous systems (2018)

Tianbai Cui and Rafael M. Fernandes

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-09

Beschreibung: Author(s): Tianbai Cui and Rafael M. Fernandes The concept of a vestigial nematic order emerging from a “mother” spin or charge-density-wave state has been applied to describe the phase diagrams of several systems, including unconventional superconductors. In a perfectly clean system, the two orders appear simultaneously via a first-order quantu... [Phys. Rev. B 98, 085117] Published Wed Aug 08, 2018

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Spinon-orbiton repulsion and attraction mediated by Hund's rule (2018)

Jonas Heverhagen and Maria Daghofer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-10

Beschreibung: Author(s): Jonas Heverhagen and Maria Daghofer We study the impact of Hund's-rule coupling on orbital excitations, as, e.g., measured in inelastic resonant x-ray scattering. We find that the interpretation in terms of spin-orbit separation, which has been derived for one-dimensional systems without Hund's rule, remains robust in its presence. De... [Phys. Rev. B 98, 085120] Published Thu Aug 09, 2018

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$\mathit{d}\mathit{\text{−}}\mathit{p}$ model and spin-orbital order in vanadium perovskites (2018)

Krzysztof Rościszewski and Andrzej M. Oleś

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-10

Beschreibung: Author(s): Krzysztof Rościszewski and Andrzej M. Oleś Using the multiband d − p model and unrestricted Hartree-Fock approximation we investigate the electronic structure and spin-orbital order in a three-dimensional VO 3 lattice. The main aim of this paper is testing if a simple d − p model with partly filled 3 d orbitals (in vanadium ions) and 2 p orbitals (... [Phys. Rev. B 98, 085119] Published Thu Aug 09, 2018

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Magnetic field induced Weyl semimetal from Wannier-function-based tight-binding model (2018)

John W. Villanova and Kyungwha Park

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): John W. Villanova and Kyungwha Park Weyl semimetals (WSMs) have Weyl nodes where conduction and valence bands meet in the absence of inversion or time-reversal symmetry (TRS) or both. The TRS-broken WSM phase can be driven from a topological Dirac semimetal by magnetic field B or magnetic dopants, considering that Dirac semimetals hav... [Phys. Rev. B 98, 075123] Published Mon Aug 13, 2018

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Single-beam optical measurement of spin dynamics in CdTe/(Cd,Mg)Te quantum wells (2018)

F. Saeed, M. Kuhnert, I. A. Akimov, V. L. Korenev, G. Karczewski, M. Wiater, T. Wojtowicz, A. Ali, A. S. Bhatti, D. R. Yakovlev, and M. Bayer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-14

Beschreibung: Author(s): F. Saeed, M. Kuhnert, I. A. Akimov, V. L. Korenev, G. Karczewski, M. Wiater, T. Wojtowicz, A. Ali, A. S. Bhatti, D. R. Yakovlev, and M. Bayer We study optical pumping of resident electron spins under resonant excitation of trions in n -type CdTe/(Cd,Mg)Te quantum wells subject to a transverse magnetic field. In contrast to the comprehensively used time-resolved pump-probe techniques with polarimetric detection, we exploit here a single bea... [Phys. Rev. B 98, 075308] Published Mon Aug 13, 2018

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Anomalous temperature dependence of the relaxation rate measured by muon spin rotation in $α\text{−}{\mathrm{YbAl}}_{0.986}{\mathrm{Fe}}_{0.014}{\mathrm{B}}_{4}$ (2018)

Kazumasa Miyake and Shinji Watanabe

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): Kazumasa Miyake and Shinji Watanabe Recently, it was reported by MacLaughlin et al. in Phys. Rev. B 93 , 214421 (2016) that α − YbAl 0.986 Fe 0.014 B 4 exhibits an anomalous temperature dependence in the relaxation rate 1 / T 1 of μ SR , and stressed that such temperature dependence cannot be understood by the scenario based on the quantum critica... [Phys. Rev. B 98, 075125] Published Tue Aug 14, 2018

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Nematic phase in a two-dimensional Hubbard model at weak coupling and finite temperature (2018)

Sergey Slizovskiy, Pablo Rodriguez-Lopez, and Joseph J. Betouras

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-15

Beschreibung: Author(s): Sergey Slizovskiy, Pablo Rodriguez-Lopez, and Joseph J. Betouras We apply the self-consistent renormalized perturbation theory to the Hubbard model on the square lattice at finite temperatures to study the evolution of the Fermi surface (FS) as a function of temperature and doping. Previously, a nematic phase for the same model has been reported to appear at weak... [Phys. Rev. B 98, 075126] Published Tue Aug 14, 2018

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Chebyshev polynomial representation of imaginary-time response functions (2018)

Emanuel Gull, Sergei Iskakov, Igor Krivenko, Alexander A. Rusakov, and Dominika Zgid

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): Emanuel Gull, Sergei Iskakov, Igor Krivenko, Alexander A. Rusakov, and Dominika Zgid Problems of finite-temperature quantum statistical mechanics can be formulated in terms of imaginary (Euclidean) -time Green's functions and self-energies. In the context of realistic Hamiltonians, the large energy scale of the Hamiltonian (as compared to temperature) necessitates a very precise rep... [Phys. Rev. B 98, 075127] Published Wed Aug 15, 2018

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Efficient approximation for global functions of matrix product operators (2018)

Moritz August and Mari Carmen Bañuls

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): Moritz August and Mari Carmen Bañuls Building on a previously introduced block Lanczos method, we demonstrate how to approximate any operator function of the form Tr f ( A ) when the argument A is given as a Hermitian matrix product operator (MPO). This gives access to quantities that, depending on the full spectrum, are difficult to acces... [Phys. Rev. B 98, 075128] Published Wed Aug 15, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Kondo effect in a $\mathcal{PT}$-symmetric non-Hermitian Hamiltonian (2018)

José A. S. Lourenço, Ronivon L. Eneias, and Rodrigo G. Pereira

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): José A. S. Lourenço, Ronivon L. Eneias, and Rodrigo G. Pereira The combination of non-Hermitian physics and strong correlations can give rise to new effects in open quantum many-body systems with balanced gain and loss. We propose a generalized Anderson impurity model that includes non-Hermitian hopping terms between an embedded quantum dot and two wires. These... [Phys. Rev. B 98, 085126] Published Wed Aug 15, 2018

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Decay and revival of electron spin polarization in an ensemble of (In,Ga)As quantum dots (2018)

E. Evers, V. V. Belykh, N. E. Kopteva, I. A. Yugova, A. Greilich, D. R. Yakovlev, D. Reuter, A. D. Wieck, and M. Bayer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-16

Beschreibung: Author(s): E. Evers, V. V. Belykh, N. E. Kopteva, I. A. Yugova, A. Greilich, D. R. Yakovlev, D. Reuter, A. D. Wieck, and M. Bayer The periodic optical orientation of electron spins in (In,Ga)As/GaAs quantum dots leads to the formation of electron spin precession modes about an external magnetic field which are resonant with the pumping periodicity. As the electron spin is localized within a nuclear spin bath, its polarization ... [Phys. Rev. B 98, 075309] Published Wed Aug 15, 2018

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Hubbard parameters from density-functional perturbation theory (2018)

Iurii Timrov, Nicola Marzari, and Matteo Cococcioni

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-17

Beschreibung: Author(s): Iurii Timrov, Nicola Marzari, and Matteo Cococcioni We present a transparent and computationally efficient approach for the first-principles calculation of Hubbard parameters from linear-response theory. This approach is based on density-functional perturbation theory and the use of monochromatic perturbations. In addition to delivering much improved... [Phys. Rev. B 98, 085127] Published Thu Aug 16, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Many-body renormalization of forces in $f$-electron materials (2018)

Evgeny Plekhanov, Phil Hasnip, Vincent Sacksteder, Matt Probert, Stewart J. Clark, Keith Refson, and Cedric Weber

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-17

Beschreibung: Author(s): Evgeny Plekhanov, Phil Hasnip, Vincent Sacksteder, Matt Probert, Stewart J. Clark, Keith Refson, and Cedric Weber We present the implementation of dynamical mean-field theory (DMFT) in the CASTEP ab initio code. We explain in detail the theoretical framework for DFT+DMFT and we demonstrate our implementation for three strongly-correlated systems with f -shell electrons: γ -cerium, cerium sesquioxide Ce 2 O 3 , and sa... [Phys. Rev. B 98, 075129] Published Thu Aug 16, 2018

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Detection and characterization of attenuated multimode waveguiding in ${\mathrm{SiO}}_{2}$ slabs using photoemission electron microscopy (2018)

Alwin Klick, René Wagner, Malte Großmann, Laith F. Kadem, Till Leißner, Horst-Günter Rubahn, Christine Selhuber-Unkel, and Michael Bauer

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-17

Beschreibung: Author(s): Alwin Klick, René Wagner, Malte Großmann, Laith F. Kadem, Till Leißner, Horst-Günter Rubahn, Christine Selhuber-Unkel, and Michael Bauer Multimode waveguiding in the visible and near-ultraviolet spectral regime is observed and characterized in thermally grown SiO 2 layers on silicon using photoemission electron microscopy (PEEM). Comparison with finite-element-method simulations allows identifying order and character of the attenuated... [Phys. Rev. B 98, 085128] Published Thu Aug 16, 2018

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Two-particle excitations under coexisting electron interaction and disorder (2018)

C. E. Ekuma

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): C. E. Ekuma We study the combined impact of random disorder and electron-electron and electron-hole interactions on the absorption spectra of a three-dimensional Hubbard Hamiltonian. We determine the single-particle Green's function within the typical medium dynamical cluster approximation. We solve the Bethe-S... [Phys. Rev. B 98, 085129] Published Fri Aug 17, 2018

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Symmetry-protected topological interfaces and entanglement sequences (2018)

Luiz H. Santos, Jennifer Cano, Michael Mulligan, and Taylor L. Hughes

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): Luiz H. Santos, Jennifer Cano, Michael Mulligan, and Taylor L. Hughes Gapped interfaces (and boundaries) of two-dimensional (2D) Abelian topological phases are shown to support a remarkably rich sequence of 1D symmetry-protected topological (SPT) states. We show that such interfaces can provide a physical interpretation for the corrections to the topological entanglem... [Phys. Rev. B 98, 075131] Published Fri Aug 17, 2018

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Dynamical signature of the moiré pattern in a non-Hermitian ladder (2018)

X. M. Yang, X. Z. Zhang, C. Li, and Z. Song

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): X. M. Yang, X. Z. Zhang, C. Li, and Z. Song We study the dynamical behavior of a non-Hermitian moire superlattice system, which consists of two-coupled Su-Schrieffer-Heeger (SSH) chains with staggered imaginary on-site potentials. The slight difference, which indicates that the in-lattice spacing of nearest-neighbor lattice sites at the top i... [Phys. Rev. B 98, 085306] Published Fri Aug 17, 2018

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Large negative magnetoresistance driven by enhanced weak localization and Kondo effect at the interface of $\mathrm{LaAl}{\mathrm{O}}_{3}$ and Fe-doped $\mathrm{SrTi}{\mathrm{O}}_{3}$ (2018)

Hongxia Xue, Yanpeng Hong, Chengjian Li, Jianchao Meng, Yongchun Li, Kejian Liu, Mingrui Liu, Weimin Jiang, Zhe Zhang, Lin He, Ruifen Dou, Changmin Xiong, and Jiacai Nie

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-18

Beschreibung: Author(s): Hongxia Xue, Yanpeng Hong, Chengjian Li, Jianchao Meng, Yongchun Li, Kejian Liu, Mingrui Liu, Weimin Jiang, Zhe Zhang, Lin He, Ruifen Dou, Changmin Xiong, and Jiacai Nie The out-of-plane magnetoresistance of a LaAl O 3 / SrTi O 3 interface is commonly positive due to significant orbital effect. In this paper, a large negative magnetoresistance is observed at a LaAl O 3 and Fe-doped SrTi O 3 interface upon the application of an out-of-plane magnetic field. Such large negative ... [Phys. Rev. B 98, 085305] Published Fri Aug 17, 2018

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Fermionic phases and their transitions induced by competing finite-range interactions (2018)

M. Szyniszewski and H. Schomerus

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-23

Beschreibung: Author(s): M. Szyniszewski and H. Schomerus We identify ground states of one-dimensional fermionic systems subject to competing repulsive interactions of finite range, and provide phenomenological and fundamental signatures of these phases and their transitions. Commensurable particle densities admit multiple competing charge-ordered insulati... [Phys. Rev. B 98, 075139] Published Wed Aug 22, 2018

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Spin-orbital-lattice entangled states in cubic ${d}^{1}$ double perovskites (2018)

Naoya Iwahara, Veacheslav Vieru, and Liviu F. Chibotaru

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-22

Beschreibung: Author(s): Naoya Iwahara, Veacheslav Vieru, and Liviu F. Chibotaru The interplay of spin-orbit coupling and vibronic coupling on the heavy d 1 site of cubic double perovskites is investigated by ab initio calculations. The stabilization energy of spin-orbital-lattice entangled states is found to be comparable to or larger than the exchange interactions, suggesting t... [Phys. Rev. B 98, 075138] Published Tue Aug 21, 2018

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Goos-Hänchen-like shifts at a metal/superconductor interface (2018)

Ying Liu, Zhi-Ming Yu, Hua Jiang, and Shengyuan A. Yang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-29

Beschreibung: Author(s): Ying Liu, Zhi-Ming Yu, Hua Jiang, and Shengyuan A. Yang At a normal-metal/superconductor interface, an incident electron from the normal-metal (N) side can be normally reflected as an electron or Andreev reflected as a hole. We show that pronounced lateral shifts along the interface between the incident and the reflected quasiparticles can happen in both... [Phys. Rev. B 98, 075151] Published Tue Aug 28, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

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${\mathbb{Z}}_{2}$ fractionalized phases of a solvable disordered $t\text{−}J$ model (2018)

Wenbo Fu, Yingfei Gu, Subir Sachdev, and Grigory Tarnopolsky

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-29

Beschreibung: Author(s): Wenbo Fu, Yingfei Gu, Subir Sachdev, and Grigory Tarnopolsky We describe the phases of a solvable t − J model of electrons with infinite-range, and random, hopping, and exchange interactions, similar to those in the Sachdev-Ye-Kitaev models. The electron fractionalizes, as in an “orthogonal metal,” into a fermion f , which carries both the electron spin and char... [Phys. Rev. B 98, 075150] Published Tue Aug 28, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Thema: Physik

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Hourglasslike nodal net semimetal in ${\mathrm{Ag}}_{2}{\mathrm{BiO}}_{3}$ (2018)

Botao Fu, Xiaotong Fan, Dashuai Ma, Cheng-Cheng Liu, and Yugui Yao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Botao Fu, Xiaotong Fan, Dashuai Ma, Cheng-Cheng Liu, and Yugui Yao Based on first-principles calculations and analysis of crystal symmetries, we propose a kind of hourglasslike nodal net (HNN) semimetal in centrosymmetric Ag 2 BiO 3 that is constructed by two hourglasslike nodal chains at mutually orthogonal planes in the extended Brillouin zone (BZ) when the weak spi... [Phys. Rev. B 98, 075146] Published Mon Aug 27, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Part-per-million quantization and current-induced breakdown of the quantum anomalous Hall effect (2018)

E. J. Fox, I. T. Rosen, Yanfei Yang, George R. Jones, Randolph E. Elmquist, Xufeng Kou, Lei Pan, Kang L. Wang, and D. Goldhaber-Gordon

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): E. J. Fox, I. T. Rosen, Yanfei Yang, George R. Jones, Randolph E. Elmquist, Xufeng Kou, Lei Pan, Kang L. Wang, and D. Goldhaber-Gordon In the quantum anomalous Hall effect, quantized Hall resistance and vanishing longitudinal resistivity are predicted to result from the presence of dissipationless, chiral edge states and an insulating two-dimensional bulk, without requiring an external magnetic field. Here, we explore the potential... [Phys. Rev. B 98, 075145] Published Mon Aug 27, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Determining the local low-energy excitations in the Kondo semimetal ${\mathrm{CeRu}}_{4}{\mathrm{Sn}}_{6}$ using resonant inelastic x-ray scattering (2018)

Andrea Amorese, Kurt Kummer, Nicholas B. Brookes, Oliver Stockert, Devashibhai T. Adroja, André M. Strydom, Andrey Sidorenko, Hannes Winkler, Diego A. Zocco, Andrey Prokofiev, Silke Paschen, Maurits W. Haverkort, Liu Hao Tjeng, and Andrea Severing

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-28

Beschreibung: Author(s): Andrea Amorese, Kurt Kummer, Nicholas B. Brookes, Oliver Stockert, Devashibhai T. Adroja, André M. Strydom, Andrey Sidorenko, Hannes Winkler, Diego A. Zocco, Andrey Prokofiev, Silke Paschen, Maurits W. Haverkort, Liu Hao Tjeng, and Andrea Severing We have investigated the local low-energy excitations in CeRu 4 Sn 6 , a material discussed recently in the framework of strongly correlated Weyl semimetals, by means of Ce M 5 resonant inelastic x-ray scattering (RIXS). The availability of both F 5 2 2 and F 7 2 2 excitations of the Ce 4 f 1 configuration in th... [Phys. Rev. B 98, 081116(R)] Published Mon Aug 27, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Schmidt gap in random spin chains (2018)

Giacomo Torlai, Kenneth D. McAlpine, and Gabriele De Chiara

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-31

Beschreibung: Author(s): Giacomo Torlai, Kenneth D. McAlpine, and Gabriele De Chiara We numerically investigate the low-lying entanglement spectrum of the ground state of random one-dimensional spin chains obtained after partition of the chain into two equal halves. We consider two paradigmatic models: the spin-1/2 random transverse-field Ising model, solved exactly, and the spin-1 ... [Phys. Rev. B 98, 085153] Published Thu Aug 30, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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Oxygen electronic screening and hybridization determining the insulator-metal transition of ${\mathrm{Eu}}_{1−x}{\mathrm{Ba}}_{x}{\mathrm{TiO}}_{3}$ (2018)

Xiao Chi, Km Rubi, Anindita Chaudhuri, Lai Mun Wong, Xiaojiang Yu, Caozheng Diao, Anil Kumar, Mark B. H. Breese, Shijie Wang, Ramanathan Mahendiran, and Andrivo Rusydi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-08-31

Beschreibung: Author(s): Xiao Chi, Km Rubi, Anindita Chaudhuri, Lai Mun Wong, Xiaojiang Yu, Caozheng Diao, Anil Kumar, Mark B. H. Breese, Shijie Wang, Ramanathan Mahendiran, and Andrivo Rusydi An insulator-metal transition (IMT) is a fascinating yet hotly debated phenomenon in condensed-matter physics. Here we report on the evolution of electronic structure across IMT as in E u 1 − x B a x Ti O 3 as a function of x ( x = 0 for ETO and x = 0.5 for EBTO) and temperature comprehensively using high-resoluti... [Phys. Rev. B 98, 085152] Published Thu Aug 30, 2018

Schlagwort(e): Electronic structure and strongly correlated systems

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