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# Recent Articles in Phys. Rev. B

## Recent articles in Physical Review B

Published: 2017-03-23T11:17:31-04:00

Transport properties of C and O in UN fuels

2017-03-23T10:00:00-04:00

Author(s): Thomas Schuler, Denise Adorno Lopes, Antoine Claisse, and Pär Olsson
Uranium nitride fuel is considered for fast reactors (GEN-IV generation and space reactors) and for light water reactors as a high-density fuel option. Despite this large interest, there is a lack of information about its behavior for in-pile and out-of-pile conditions. From the present literature, …
[Phys. Rev. B 95, 094117] Published Thu Mar 23, 2017

Operator entanglement entropy of the time evolution operator in chaotic systems

2017-03-23T10:00:00-04:00

Author(s): Tianci Zhou and David J. Luitz

Entanglement entropy is a widely applicable indicator of the onset of quantum chaos. In particular, the entanglement entropy of the wave function after a quench from an initial state with low entanglement can be used to study the thermalization of the system. Here, the authors propose an initial-state independent quantity called the “operator entanglement entropy” (opEE) to extract the properties of the unitary evolution operator. They study the growth of the opEE in Floquet, chaotic, and many-body localized systems. They respectively have a linear, power-law, and logarithmic growth before reaching extensive saturation values. The most chaotic Floquet spin model has the maximal saturation value among the three classes and is identical to the value of a random unitary operator (the Page value). The authors interpret the opEE as the state EE of a quenched state living in a doubled Hilbert space, thus establishing its consistency with the existing state EE results. They conclude that the EE of the evolution operator should characterize the propagation of information in these systems.

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[Phys. Rev. B 95, 094206] Published Thu Mar 23, 2017

Thermal expansion of the heavy-fermion superconductor PuCoGa_{5}

2017-03-23T10:00:00-04:00

Author(s): R. Eloirdi, C. Giacobbe, P. Amador Celdran, N. Magnani, G. H. Lander, J.-C. Griveau, E. Colineau, K. Miyake, and R. Caciuffo
We have performed high-resolution powder x-ray-diffraction measurements on a sample of ^{242}PuCoGa_{5}, the heavy-fermion superconductor with the highest critical temperature of T_{c}=18.7K. The results show that the tetragonal symmetry of its crystallographic lattice is preserved down to 2 K. Marg…
[Phys. Rev. B 95, 094517] Published Thu Mar 23, 2017

Thermal spin torques in magnetic insulators

2017-03-23T10:00:00-04:00

Author(s): H. Yu, S. D. Brechet, P. Che, F. A. Vetro, M. Collet, S. Tu, Y. G. Zhang, Y. Zhang, T. Stueckler, L. Wang, H. Cui, D. Wang, C. Zhao, P. Bortolotti, A. Anane, J-Ph. Ansermet, and W. Zhao
The damping of spin waves transmitted through a two-port magnonic device implemented on a yttrium iron garnet thin film is shown to be proportional to the temperature gradient imposed on the device. The sign of the damping depends on the relative orientation of the magnetic field, the wave vector, a…
[Phys. Rev. B 95, 104432] Published Thu Mar 23, 2017

Enhancement of crossed Andreev reflection in a superconducting ladder connected to normal metal leads

2017-03-23T10:00:00-04:00

Author(s): Abhiram Soori and Subroto Mukerjee
Crossed Andreev reflection (cAR) is a scattering process that happens in a quantum transport setup consisting of two normal metals (NM) attached to a superconductor (SC), where an electron incident from one NM results in a hole emerging in the other. Typically, electron tunneling (ET) through the su…
[Phys. Rev. B 95, 104517] Published Thu Mar 23, 2017

Atomic displacements in quantum crystals

2017-03-23T10:00:00-04:00

Author(s): Marisa Dusseault and Massimo Boninsegni
Displacements of atoms and molecules away from lattice sites in helium and parahydrogen solids at low temperature have been studied by means of quantum Monte Carlo simulations. In the bcc phases of ^{3}He and ^{4}He, atomic displacements are largely quantum-mechanical in character, even at melting. …
[Phys. Rev. B 95, 104518] Published Thu Mar 23, 2017

Evidence of topological insulator state in the semimetal LaBi

2017-03-23T10:00:00-04:00

Author(s): R. Lou, B.-B. Fu, Q. N. Xu, P.-J. Guo, L.-Y. Kong, L.-K. Zeng, J.-Z. Ma, P. Richard, C. Fang, Y.-B. Huang, S.-S. Sun, Q. Wang, L. Wang, Y.-G. Shi, H. C. Lei, K. Liu, H. M. Weng, T. Qian, H. Ding, and S.-C. Wang
By employing angle-resolved photoemission spectroscopy combined with first-principles calculations, we performed a systematic investigation on the electronic structure of LaBi, which exhibits extremely large magnetoresistance (XMR), and is theoretically predicted to possess band anticrossing with no…
[Phys. Rev. B 95, 115140] Published Thu Mar 23, 2017

Conformal energy currents on the edge of a topological superconductor

2017-03-23T10:00:00-04:00

Author(s): Chris N. Self, Jiannis K. Pachos, James R. Wootton, and Sofyan Iblisdir
The boundary of a two-dimensional topological superconductor can be modeled by a conformal field theory. Here we demonstrate the behaviors of this high level description emerging from a microscopic model at finite temperatures. To achieve that, we analyze the low-energy sector of Kitaev's honeycomb …
[Phys. Rev. B 95, 115141] Published Thu Mar 23, 2017

Giant magnetoresistance and anomalous transport in phosphorene-based multilayers with noncollinear magnetization

2017-03-23T10:00:00-04:00

Author(s): Moslem Zare, Leyla Majidi, and Reza Asgari
We theoretically investigate the unusual features of the magnetotransport in a monolayer phosphorene ferromagnetic/normal/ferromagnetic (F/N/F) hybrid structure. We find that the charge conductance can feature a minimum at parallel (P) configuration and a maximum near the antiparallel (AP) configura…
[Phys. Rev. B 95, 115426] Published Thu Mar 23, 2017

Tunneling of heat between metals

2017-03-23T10:00:00-04:00

Author(s): G. D. Mahan
We provide a theory of how heat tunnels between two parallel metal surfaces separated by an air gap. Two contributions are calculated: (1) electron-electron interactions and (2) photon fields from surface plasmons. Both contributions can transfer energy through low energy electron pairs. Our concern…
[Phys. Rev. B 95, 115427] Published Thu Mar 23, 2017

Thermodynamic constraints on the amplitude of quantum oscillations

2017-03-23T10:00:00-04:00

Author(s): Arkady Shekhter, K. A. Modic, R. D. McDonald, and B. J. Ramshaw
Magneto-quantum oscillation experiments in high-temperature superconductors show a strong thermally induced suppression of the oscillation amplitude approaching the critical dopings [B. J. Ramshaw et al., Science 348, 317 (2014); H. Shishido et al., Phys. Rev. Lett. 104, 057008 (2010); P. Walmsley…
[Phys. Rev. B 95, 121106(R)] Published Thu Mar 23, 2017

Nematic fluctuations balancing the zoo of phases in half-filled quantum Hall systems

2017-03-23T10:00:00-04:00

Author(s): Andrej Mesaros, Michael J. Lawler, and Eun-Ah Kim
Half-filled Landau levels form a zoo of strongly correlated phases. These include non-Fermi-liquids (NFLs), fractional quantum Hall (FQH) states, nematic phases, and FQH nematic phases. This diversity begs the following question: what keeps the balance between the seemingly unrelated phases? The ans…
[Phys. Rev. B 95, 125127] Published Thu Mar 23, 2017

Ultrathin magnetite in Fe_{3} O_{4} /MgO superlattices: Investigating the enhanced thin film magnetic moment

2017-03-23T10:00:00-04:00

Author(s): Ozhet Mauit, Karsten Fleischer, Cormac Ó Coileáin, Brendan Bulfin, Daniel S. Fox, Christopher M. Smith, Daragh Mullarkey, Gulnar Sugurbekova, Hongzhou Zhang, and Igor V. Shvets
The electrical, crystallographic, and magnetic properties of ultrathin magnetite (Fe_{3}O_{4}) have been studied in detail, by employing superlattice structures of Fe_{3}O_{4}/MgFe_{2}O_{4} and Fe_{3}O_{4}/MgO on a variety of substrates. By careful analysis of their properties, the influence of subs…
[Phys. Rev. B 95, 125128] Published Thu Mar 23, 2017

Effective realization of random magnetic fields in compounds with large single-ion anisotropy

2017-03-23T10:00:00-04:00

Author(s): J. Herbrych and J. Kokalj
We show that spin S=1 system with large and random single-ion anisotropy can be at low energies mapped to a S=1/2 system with random magnetic fields. This is, for example, realized in Ni(Cl_{1−x}Br_{x})_{2}−4SC(NH_{2})_{2} compound (DTNX) and therefore it represents a long-sought realization of rand…
[Phys. Rev. B 95, 125129] Published Thu Mar 23, 2017

Low-temperature features in the heat capacity of unary metals and intermetallics for the example of bulk aluminum and Al_{3} Sc

2017-03-22T10:00:00-04:00

Author(s): Ankit Gupta, Bengü Tas Kavakbasi, Biswanath Dutta, Blazej Grabowski, Martin Peterlechner, Tilmann Hickel, Sergiy V. Divinski, Gerhard Wilde, and Jörg Neugebauer
We explore the competition and coupling of vibrational and electronic contributions to the heat capacity of Al and Al_{3}Sc at temperatures below 50 K, combining experimental calorimetry with highly converged finite-temperature density functional theory calculations. We find that semilocal exchange-…
[Phys. Rev. B 95, 094307] Published Wed Mar 22, 2017

First-principles calculation of the effects of partial alloy disorder on the static and dynamic magnetic properties of Co_{2} MnSi

2017-03-22T10:00:00-04:00

Author(s): B. Pradines, R. Arras, I. Abdallah, N. Biziere, and L. Calmels
On the basis of fully relativistic Korringa-Kohn-Rostoker calculations and in conjunction with the coherent potential approximation and the linear response formalism, we present a complete ab initio study of the influence of alloy disorder on the static and dynamic (Gilbert damping) magnetic propert…
[Phys. Rev. B 95, 094425] Published Wed Mar 22, 2017

On the Nambu fermion-boson relations for superfluid ^{3} He

2017-03-22T10:00:00-04:00

Author(s): J. A. Sauls and Takeshi Mizushima
Superfluid ^{3}He is a spin-triplet (S=1), p-wave (L=1) BCS condensate of Cooper pairs with total angular momentum J=0 in the ground state. In addition to the breaking of U(1) gauge symmetry, separate spin or orbital rotation symmetry is broken to the maximal subgroup SO(3)_{S}×SO(3)_{L}→SO(3)_{J}. …
[Phys. Rev. B 95, 094515] Published Wed Mar 22, 2017

Andreev bound states in superconductor/ferromagnet point contact Andreev reflection spectra

2017-03-22T10:00:00-04:00

Author(s): K. A. Yates, L. A. B. Olde Olthof, M. E. Vickers, D. Prabhakaran, M. Egilmez, J. W. A. Robinson, and L. F. Cohen
As charge carriers traverse a single superconductor ferromagnet interface, they experience an additional spin-dependent phase angle that results in spin mixing and the formation of a bound state called the Andreev bound state. Here we explore whether point contact Andreev reflection can be used to d…
[Phys. Rev. B 95, 094516] Published Wed Mar 22, 2017

Ab initio explanation of disorder and off-stoichiometry in Fe-Mn-Al-C κ carbides

2017-03-22T10:00:00-04:00

Author(s): Poulumi Dey, Roman Nazarov, Biswanath Dutta, Mengji Yao, Michael Herbig, Martin Friák, Tilmann Hickel, Dierk Raabe, and Jörg Neugebauer
Carbides play a central role for the strength and ductility in many materials. Simulating the impact of these precipitates on the mechanical performance requires knowledge about their atomic configuration. In particular, the C content is often observed to substantially deviate from the ideal stoichi…
[Phys. Rev. B 95, 104108] Published Wed Mar 22, 2017

Non-Hookean statistical mechanics of clamped graphene ribbons

2017-03-22T10:00:00-04:00

Author(s): Mark J. Bowick, Andrej Košmrlj, David R. Nelson, and Rastko Sknepnek
Thermally fluctuating sheets and ribbons provide an intriguing forum in which to investigate strong violations of Hooke's Law: Large distance elastic parameters are in fact not constant but instead depend on the macroscopic dimensions. Inspired by recent experiments on free-standing graphene cantile…
[Phys. Rev. B 95, 104109] Published Wed Mar 22, 2017

Spin-wave approach to the two-magnon Raman scattering in a J_{1x} −J_{1y} −J_{2} −J_{c} antiferromagnetic Heisenberg model

2017-03-22T10:00:00-04:00

Author(s): Changle Liu, Anmin Zhang, Qingming Zhang, Rong Yu, and Xiaoqun Wang
We study the two-magnon nonresonant Raman scattering in the (π,π) and (π,0) in-plane ordered antiferromagnetic phases of a spin-SJ_{1x}−J_{1y}−J_{2}−J_{c} Heisenberg model on the tetragonal lattice within the framework of the spin-wave theory. We show that magnon-magnon interactions may significantl…
[Phys. Rev. B 95, 104431] Published Wed Mar 22, 2017

Spin-flip reflection at the normal metal-spin superconductor interface

2017-03-22T10:00:00-04:00

Author(s): Peng Lv, Ai-Min Guo, Huaiyu Li, Chunxiao Liu, X. C. Xie, and Qing-Feng Sun
We study spin transport through a normal metal-spin superconductor junction. A spin-flip reflection is demonstrated at the interface, where a spin-up electron incident from the normal metal can be reflected as a spin-down electron and the spin 2×ℏ/2 will be injected into the spin superconductor. Whe…
[Phys. Rev. B 95, 104516] Published Wed Mar 22, 2017

Subdimensional particle structure of higher rank U(1) spin liquids

2017-03-22T10:00:00-04:00

Author(s): Michael Pretko

Quantum spin liquids can be well described in the language of gauge theory. While most theoretical effort has been focused on gauge theories with a familiar vector gauge field, there exists a stable class of quantum spin liquids described by higher-rank tensor gauge fields. Here, the authors focus on a class of stable three-dimensional spin liquids described by symmetric tensor $U$(1) gauge fields. They find that these spin liquids feature an exotic class of excitations that are restricted to motion along lower-dimensional subspaces, a phenomenon seen earlier in fracton models. They show how this subdimensional behavior follows naturally from a set of higher-moment charge conservation laws that place severe restrictions on particle motion. This work opens up an exciting new direction in the field of spin liquids.

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[Phys. Rev. B 95, 115139] Published Wed Mar 22, 2017

Energetic, electronic, and magnetic properties of Mn pairs on reconstructed (001) GaAs surfaces

2017-03-22T10:00:00-04:00

Author(s): Magdalena Birowska, Cezary Śliwa, and Jacek A. Majewski
We study energetic, magnetic, and electronic properties of diluted substitutional Mn pairs on reconstructed (001) GaAs surfaces. The studies are based on first-principles calculations in the framework of density functional theory. We demonstrate that the stability of the systems strongly depends on …
[Phys. Rev. B 95, 115311] Published Wed Mar 22, 2017

Dirac line nodes and effect of spin-orbit coupling in the nonsymmorphic critical semimetals MSiS(M=Hf,Zr)

2017-03-22T10:00:00-04:00

Author(s): C. Chen, X. Xu, J. Jiang, S.-C. Wu, Y. P. Qi, L. X. Yang, M. X. Wang, Y. Sun, N. B. M. Schröter, H. F. Yang, L. M. Schoop, Y. Y. Lv, J. Zhou, Y. B. Chen, S. H. Yao, M. H. Lu, Y. F. Chen, C. Felser, B. H. Yan, Z. K. Liu, and Y. L. Chen
Topological Dirac semimetals (TDSs) represent a new state of quantum matter recently discovered that offers a platform for realizing many exotic physical phenomena. A TDS is characterized by the linear touching of bulk (conduction and valance) bands at discrete points in the momentum space [i.e., th…
[Phys. Rev. B 95, 125126] Published Wed Mar 22, 2017

Band splitting and Weyl nodes in trigonal tellurium studied by angle-resolved photoemission spectroscopy and density functional theory

2017-03-22T10:00:00-04:00

Author(s): K. Nakayama, M. Kuno, K. Yamauchi, S. Souma, K. Sugawara, T. Oguchi, T. Sato, and T. Takahashi
We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) on trigonal tellurium consisting of helical chains in the crystal. Through the band-structure mapping in the three-dimensional Brillouin zone, we found a definitive evidence for the band splitting originating from th…
[Phys. Rev. B 95, 125204] Published Wed Mar 22, 2017

Observation of diffusive and dispersive profiles of the nonequilibrium polariton-condensate dispersion relation in a CuBr microcavity

2017-03-22T10:00:00-04:00

Author(s): Masaaki Nakayama and Masafumi Ueda
We have investigated the dispersion relation of polariton condensates in a CuBr microcavity with the use of angle-resolved photoluminescence (PL) spectroscopy at 77 K. The polariton condensation was clearly confirmed by the thresholdlike changes in the PL intensity, energy, and bandwidth of the lowe…
[Phys. Rev. B 95, 125315] Published Wed Mar 22, 2017

Magnonic quantum Hall effect and Wiedemann-Franz law

2017-03-22T10:00:00-04:00

Author(s): Kouki Nakata, Jelena Klinovaja, and Daniel Loss
We present a quantum Hall effect of magnons in two-dimensional clean insulating magnets at finite temperature. Through the Aharonov-Casher effect, a magnon moving in an electric field acquires a geometric phase and forms Landau levels in an electric field gradient of sawtooth form. At low temperatur…
[Phys. Rev. B 95, 125429] Published Wed Mar 22, 2017

Prediction of high-temperature quantum anomalous Hall effect in two-dimensional transition-metal oxides

2017-03-22T10:00:00-04:00

Author(s): H. P. Wang, Wei Luo, and H. J. Xiang
Quantum anomalous Hall (QAH) insulator is a topological phase which exhibits chiral edge states in the absence of magnetic field. The celebrated Haldane model is the first example of QAH effect (QAHE), but it is difficult to realize. Here, we predict the two-dimensional (2D) single-atomic-layer V_{2…
[Phys. Rev. B 95, 125430] Published Wed Mar 22, 2017

Coulomb impurities in two-dimensional topological insulators

2017-03-22T10:00:00-04:00

Author(s): Jia-Lin Zhu, Guo Li, and Ning Yang
Introducing a powerful method, we obtain the exact solutions for a Coulomb impurity in two-dimensional infinite and finite topological insulators. The level order and zero-energy degeneracy of the spectra are found to be quite different between topological trivial and nontrivial phases. For quantum …
[Phys. Rev. B 95, 125431] Published Wed Mar 22, 2017

Effect of long-range hopping and interactions on entanglement dynamics and many-body localization

2017-03-21T10:00:00-04:00

Author(s): Rajeev Singh, Roderich Moessner, and Dibyendu Roy
We numerically investigate the dynamics of entanglement in a chain of spinless fermions with nonrandom but long-range hopping and interactions, and with random on-site energies. For moderate disorder in the absence of interactions, the chain hosts delocalized states at the top of the band which unde…
[Phys. Rev. B 95, 094205] Published Tue Mar 21, 2017

Effect of the type-I to type-II Weyl semimetal topological transition on superconductivity

2017-03-21T10:00:00-04:00

Author(s): Dingping Li, Baruch Rosenstein, B. Ya. Shapiro, and I. Shapiro
The influence of recently discovered topological transition between type-I and type-II Weyl semimetals on superconductivity is considered. A set of Gorkov equations for weak superconductivity in Weyl semimetal under topological phase transition is derived and solved. The critical temperature and sup…
[Phys. Rev. B 95, 094513] Published Tue Mar 21, 2017

Consistent two-lifetime model for spectral functions of superconductors

2017-03-21T10:00:00-04:00

Author(s): František Herman and Richard Hlubina
Recently it has been found that models with at least two lifetimes have to be considered when analyzing the angle-resolved photoemission data in the nodal region of the cuprates [Kondo et al., Nat. Commun. 6, 7699 (2015)]. In this paper we compare two such models. First we show that the phenomenolo…
[Phys. Rev. B 95, 094514] Published Tue Mar 21, 2017

Publisher's Note: 3d-electron Heisenberg pyrochlore Mn_{2} Sb_{2} O_{7} [Phys. Rev. B 94, 174431 (2016)]

2017-03-21T10:00:00-04:00

Author(s): Darren C. Peets, Hasung Sim, Maxim Avdeev, and Je-Geun Park

[Phys. Rev. B 95, 099903] Published Tue Mar 21, 2017

First-principles simulations of vibrational decay and lifetimes in a-Si:H and a-Si:D

2017-03-21T10:00:00-04:00

Author(s): Raymond Atta-Fynn, David A. Drabold, Stephen R. Elliott, and Parthapratim Biswas
Phonon lifetime in materials is an important observable that conveys basic information about structure, dynamics, and anharmonicity. Recent vibrational transient-grating measurements, using picosecond infrared pulses from free-electron lasers, have demonstrated that the vibrational-population decay …
[Phys. Rev. B 95, 104205] Published Tue Mar 21, 2017

S=1/2 quantum critical spin ladders produced by orbital ordering in Ba_{2} CuTeO_{6}

2017-03-21T10:00:00-04:00

Author(s): A. S. Gibbs, A. Yamamoto, A. N. Yaresko, K. S. Knight, H. Yasuoka, M. Majumder, M. Baenitz, P. J. Saines, J. R. Hester, D. Hashizume, A. Kondo, K. Kindo, and H. Takagi
The ordered hexagonal perovskite Ba_{2}CuTeO_{6} hosts weakly coupled S=1/2 spin ladders produced by an orbital ordering of Cu^{2+}. The magnetic susceptibility χ(T) of Ba_{2}CuTeO_{6} is well described by that expected for isolated spin ladders with exchange coupling of J≈86K but shows a deviation …
[Phys. Rev. B 95, 104428] Published Tue Mar 21, 2017

Spin-orbit-based device for electron spin polarization

2017-03-21T10:00:00-04:00

Author(s): Y. Avishai and Y. B. Band
We propose quantum devices having spin-orbit coupling (but no magnetic fields or magnetic materials) that, when attached to leads, yield a high degree of transmitted electron polarization. An example of such a simple device is treated within a tight binding model composed of two one-dimensional chai…
[Phys. Rev. B 95, 104429] Published Tue Mar 21, 2017

Dynamics of magnetic nanoparticles in a viscous fluid driven by rotating magnetic fields

2017-03-21T10:00:00-04:00

The rotational dynamics of magnetic nanoparticles in rotating magnetic fields in the presence of thermal noise is studied both theoretically and by performing numerical calculations. Equations for the dynamics of particles with uniaxial magnetic anisotropy are studied and the phase lag between the r…
[Phys. Rev. B 95, 104430] Published Tue Mar 21, 2017

Effects of heavy-ion irradiation on FeSe

2017-03-21T10:00:00-04:00

Author(s): Yue Sun, Akiyoshi Park, Sunseng Pyon, Tsuyoshi Tamegai, Tadashi Kambara, and Ataru Ichinose
We report the effects of heavy-ion irradiation on FeSe single crystals by irradiating uranium up to a dose-equivalent matching field of B_{ϕ}=16 T. Almost continuous columnar defects along the c axis with a diameter of ∼10 nm are confirmed by high-resolution transmission electron microscopy. T_{c} i…
[Phys. Rev. B 95, 104514] Published Tue Mar 21, 2017

Unconventional superconductivity from magnetism in transition-metal dichalcogenides

2017-03-21T10:00:00-04:00

Author(s): M. A. Rahimi, A. G. Moghaddam, C. Dykstra, M. Governale, and U. Zülicke
We investigate proximity-induced superconductivity in monolayers of transition-metal dichalcogenides (TMDs) in the presence of an externally generated exchange field. A variety of superconducting order parameters is found to emerge from the interplay of magnetism and superconductivity, covering the …
[Phys. Rev. B 95, 104515] Published Tue Mar 21, 2017

Many-body correlations and coupling in benzene-dithiol junctions

2017-03-21T10:00:00-04:00

Author(s): T. Rangel, A. Ferretti, V. Olevano, and G.-M. Rignanese
Most theoretical studies of nanoscale transport in molecular junctions rely on the combination of the Landauer formalism with Kohn-Sham density functional theory (DFT) using standard local and semilocal functionals to approximate exchange and correlation effects. In many cases, the resulting conduct…
[Phys. Rev. B 95, 115137] Published Tue Mar 21, 2017

Antiferromagnetic Dirac semimetals in two dimensions

2017-03-21T10:00:00-04:00

Author(s): Jing Wang
The search for symmetry-protected two-dimensional (2D) Dirac semimetals analogous to graphene is important both for fundamental and practical interest. The 2D Dirac cones are protected by crystalline symmetries and magnetic ordering may destroy their robustness. Here we propose a general framework t…
[Phys. Rev. B 95, 115138] Published Tue Mar 21, 2017

Symmetry breaking and (pseudo)spin polarization in Veselago lenses for massless Dirac fermions

2017-03-21T10:00:00-04:00

Author(s): K. J. A. Reijnders and M. I. Katsnelson
We study Veselago lensing of massless Dirac fermions by n-p junctions for electron sources with a certain polarization. This polarization corresponds to pseudospin for graphene and to real spin for topological insulators. Both for a point source and for injection into a sample through a narrow lead,…
[Phys. Rev. B 95, 115310] Published Tue Mar 21, 2017

Transmission in graphene–topological insulator heterostructures

2017-03-21T10:00:00-04:00

Author(s): C. De Beule, M. Zarenia, and B. Partoens
We investigate scattering of the topological surface state of a three-dimensional time-reversal invariant topological insulator when graphene is deposited on the topological-insulator surface. Specifically, we consider the (111) surface of a Bi_{2}Se_{3}-like topological insulator. We present a low-…
[Phys. Rev. B 95, 115424] Published Tue Mar 21, 2017

Stokes paradox in electronic Fermi liquids

2017-03-21T10:00:00-04:00

Author(s): Andrew Lucas
The Stokes paradox is the statement that in a viscous two-dimensional fluid, the “linear response” problem of fluid flow around an obstacle is ill posed. We present a simple consequence of this paradox in the hydrodynamic regime of a Fermi liquid of electrons in two-dimensional metals. Using hydrody…
[Phys. Rev. B 95, 115425] Published Tue Mar 21, 2017

Nanostructured graphene for spintronics

2017-03-21T10:00:00-04:00

Author(s): Søren Schou Gregersen, Stephen R. Power, and Antti-Pekka Jauho
Zigzag edges of the honeycomb structure of graphene exhibit magnetic polarization, making them attractive as building blocks for spintronic devices. Here, we show that devices with zigzag-edged triangular antidots perform essential spintronic functionalities, such as spatial spin splitting or spin f…
[Phys. Rev. B 95, 121406(R)] Published Tue Mar 21, 2017

Partition-free approach to open quantum systems in harmonic environments: An exact stochastic Liouville equation

2017-03-21T10:00:00-04:00

Author(s): G. M. G. McCaul, C. D. Lorenz, and L. Kantorovich
We present a partition-free approach to the evolution of density matrices for open quantum systems coupled to a harmonic environment. The influence functional formalism combined with a two-time Hubbard-Stratonovich transformation allows us to derive a set of exact differential equations for the redu…
[Phys. Rev. B 95, 125124] Published Tue Mar 21, 2017

Hybrid-space density matrix renormalization group study of the doped two-dimensional Hubbard model

2017-03-21T10:00:00-04:00

Author(s): G. Ehlers, S. R. White, and R. M. Noack
The performance of the density matrix renormalization group (DMRG) is strongly influenced by the choice of the local basis of the underlying physical lattice. We demonstrate that, for the two-dimensional Hubbard model, the hybrid–real-momentum-space formulation of the DMRG is computationally more ef…
[Phys. Rev. B 95, 125125] Published Tue Mar 21, 2017

First-principles quantum transport method for disordered nanoelectronics: Disorder-averaged transmission, shot noise, and device-to-device variability

2017-03-21T10:00:00-04:00

Author(s): Jiawei Yan, Shizhuo Wang, Ke Xia, and Youqi Ke
Because disorders are inevitable in realistic nanodevices, the capability to quantitatively simulate the disorder effects on electron transport is indispensable for quantum transport theory. Here, we report a unified and effective first-principles quantum transport method for analyzing effects of ch…
[Phys. Rev. B 95, 125428] Published Tue Mar 21, 2017

Instantaneous charge and dielectric response to terahertz pulse excitation in TTF-CA

2017-03-20T10:00:00-04:00

Author(s): Hiroki Gomi, Naoto Yamagishi, Tomohito Mase, Takeshi J. Inagaki, and Akira Takahashi
We present the results of exact numerical calculations of the dielectric properties of tetrathiafulvalene-p-chloranil (TTF-CA) using the extended Hubbard model. The electronic polarization P[over ¯]_{el} of the ionic ground state is obtained by directly calculating the adiabatic flow of current. The…
[Phys. Rev. B 95, 094116] Published Mon Mar 20, 2017

Phonons in Si_{24} at simultaneously elevated temperature and pressure

2017-03-20T10:00:00-04:00

Author(s): Xiao Tong, Xiaolin Xu, B. Fultz, Haidong Zhang, Timothy A. Strobel, and Duck Young Kim
Raman spectroscopy was used to measure the frequencies of phonons in Si_{24} with an open clathrate structure at temperatures from 80 to 400 K with simultaneous pressures of 0 to 8 GPa. The frequency shifts of the different phonons were substantially different under either temperature or pressure. T…
[Phys. Rev. B 95, 094306] Published Mon Mar 20, 2017

Formation and stability of metastable skyrmionic spin structures with various topologies in an ultrathin film

2017-03-20T10:00:00-04:00

Author(s): Levente Rózsa, Krisztián Palotás, András Deák, Eszter Simon, Rocio Yanes, László Udvardi, László Szunyogh, and Ulrich Nowak
We observe metastable localized spin configurations with topological charges ranging from Q=−3 to Q=2 in a (Pt_{0.95}Ir_{0.05})/Fe bilayer on a Pd(111) surface by performing spin dynamics simulations, using a classical Hamiltonian parametrized by ab initio calculations. We demonstrate that the frust…
[Phys. Rev. B 95, 094423] Published Mon Mar 20, 2017

Zigzag antiferromagnetic ground state with anisotropic correlation lengths in the quasi-two-dimensional honeycomb lattice compound Na_{2} Co_{2} TeO_{6}

2017-03-20T10:00:00-04:00

Author(s): A. K. Bera, S. M. Yusuf, Amit Kumar, and C. Ritter
The crystal structure, magnetic ground state, and the temperature-dependent microscopic spin-spin correlations of the frustrated honeycomb lattice antiferromagnet Na_{2}Co_{2}TeO_{6} have been investigated by powder neutron diffraction. A long-range antiferromagnetic (AFM) ordering has been found be…
[Phys. Rev. B 95, 094424] Published Mon Mar 20, 2017

Chern-Simons theory and Wilson loops in the Brillouin zone

2017-03-20T10:00:00-04:00

Author(s): Biao Lian, Cumrun Vafa, Farzan Vafa, and Shou-Cheng Zhang

Berry connection is conventionally defined as a static gauge field in the Brillouin zone. Here, the authors show that for three-dimensional (3D) time-reversal invariant superconductors, a generalized Berry gauge field behaves as a fluctuating field of a momentum-space Chern-Simons gauge theory, which is the effective theory of the system. Furthermore, the gapless nodal lines in the momentum space which may arise in such superconductors play exactly the role of Wilson loop observables, and their linking and knot invariants modify the gravitational theta angle which can be evaluated from the Chern-Simons action. This angle induces a topological gravitomagnetoelectric effect where a temperature gradient induces a rotational energy flow. The authors also show how this idea may be potentially generalized to realize topological strings in six-dimensional phase space, where the physical space defects play the role of topological D-branes.

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[Phys. Rev. B 95, 094512] Published Mon Mar 20, 2017

Nonreciprocity of electrically excited thermal spin signals in CoFeAl-Cu-Py lateral spin valves

2017-03-20T10:00:00-04:00

Author(s): Shaojie Hu, Xiaomin Cui, Tatsuya Nomura, Tai Min, and Takashi Kimura
Electrical and thermal spin currents excited by an electric current have been systematically investigated in lateral spin valves consisting of CoFeAl and Ni_{80}Fe_{20} (Py) wires bridged by a Cu strip. In the electrical spin signal, the reciprocity between the current and voltage probes was clearly…
[Phys. Rev. B 95, 100403(R)] Published Mon Mar 20, 2017

Friction of atomically stepped surfaces

2017-03-20T10:00:00-04:00

Author(s): R. J. Dikken, B. J. Thijsse, and L. Nicola
The friction behavior of atomically stepped metal surfaces under contact loading is studied using molecular dynamics simulations. While real rough metal surfaces involve roughness at multiple length scales, the focus of this paper is on understanding friction of the smallest scale of roughness: atom…
[Phys. Rev. B 95, 104106] Published Mon Mar 20, 2017

Phase separation in dilute solutions of ^{3} He in solid ^{4} He

2017-03-20T10:00:00-04:00

Author(s): C. Huan, L. Yin, J. S. Xia, D. Candela, B. P. Cowan, and N. S. Sullivan

The dynamics of the phase separation of very dilute ${}^{3}$He-${}^{4}$He solid solutions is studied using high-sensitivity low-temperature NMR techniques. This paper compares the results observed at very low concentrations (down to 16 ppm ${}^{3}$He) with previous results up to 2%. The growth of ${}^{3}$He nanodroplets after phase separation is analyzed and shown to follow a one-third power-law dependence at long times as expected for Ostwald ripening. The time scale for the dynamics is governed by the relatively fast quantum diffusion in solid helium, allowing the long-term behavior of the ripening process to be explored by experiments lasting a few days rather than several months, as in the case of metallic alloys.

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[Phys. Rev. B 95, 104107] Published Mon Mar 20, 2017

Probability distribution of the entanglement across a cut at an infinite-randomness fixed point

2017-03-20T10:00:00-04:00

Author(s): Trithep Devakul, Satya N. Majumdar, and David A. Huse
We calculate the probability distribution of entanglement entropy S across a cut of a finite one-dimensional spin chain of length L at an infinite-randomness fixed point using Fisher's strong randomness renormalization group (RG). Using the random transverse-field Ising model as an example, the dist…
[Phys. Rev. B 95, 104204] Published Mon Mar 20, 2017

Broadband magnetoelastic coupling in magnonic-phononic crystals for high-frequency nanoscale spin-wave generation

2017-03-20T10:00:00-04:00

Author(s): Piotr Graczyk, Jarosław Kłos, and Maciej Krawczyk
Spin waves are promising candidates for information carriers in advanced technology. The interactions between spin waves and acoustic waves in magnetic nanostructures are of much interest because of their potential application for spin-wave generation, amplification, and transduction. We investigate…
[Phys. Rev. B 95, 104425] Published Mon Mar 20, 2017

Dynamic coupling of ferromagnets via spin Hall magnetoresistance

2017-03-20T10:00:00-04:00

Author(s): Tomohiro Taniguchi
The synchronized magnetization dynamics in ferromagnets on a nonmagnetic heavy metal caused by the spin Hall effect is investigated theoretically. The direct and inverse spin Hall effects near the ferromagnetic/nonmagnetic interface generate longitudinal and transverse electric currents. The phenome…
[Phys. Rev. B 95, 104426] Published Mon Mar 20, 2017

Electronic structure and magnetic properties in T_{2} AlB_{2} (T=Fe, Mn, Cr, Co, and Ni) and their alloys

2017-03-20T10:00:00-04:00

Author(s): Liqin Ke, Bruce N. Harmon, and Matthew J. Kramer
The electronic structure and intrinsic magnetic properties of Fe_{2}AlB_{2}-related compounds and their alloys have been investigated using density functional theory. For Fe_{2}AlB_{2}, the crystallographic a axis is the easiest axis, which agrees with experiments. The magnetic ground state of Mn_{2…
[Phys. Rev. B 95, 104427] Published Mon Mar 20, 2017

Superconductor-antiferromagnet-superconductor π Josephson junction based on an antiferromagnetic barrier

2017-03-20T10:00:00-04:00

Author(s): Lev Bulaevskii, Ronivon Eneias, and Alvaro Ferraz
We show theoretically that π Josephson junctions may be constructed by use of antiferromagnetic (AF) metals between superconducting electrodes. We argue that the AF magnetic ordering introduces the energy difference of electrons in a Cooper pair due to the effect of the exchange field varying in spa…
[Phys. Rev. B 95, 104513] Published Mon Mar 20, 2017

Compact localized states and flat-band generators in one dimension

2017-03-20T10:00:00-04:00

Author(s): Wulayimu Maimaiti, Alexei Andreanov, Hee Chul Park, Oleg Gendelman, and Sergej Flach
Flat bands (FB) are strictly dispersionless bands in the Bloch spectrum of a periodic lattice Hamiltonian, recently observed in a variety of photonic and dissipative condensate networks. FB Hamiltonians are fine-tuned networks, still lacking a comprehensive generating principle. We introduce a FB ge…
[Phys. Rev. B 95, 115135] Published Mon Mar 20, 2017

Fibonacci anyons and charge density order in the 12/5 and 13/5 quantum Hall plateaus

2017-03-20T10:00:00-04:00

Author(s): Roger S. K. Mong, Michael P. Zaletel, Frank Pollmann, and Zlatko Papić
The ν=12/5 fractional quantum Hall plateau observed in GaAs semiconductor wells is a suspect in the search for non-Abelian Fibonacci anyons. Using the infinite density matrix renormalization group, we find clear evidence that fillings ν=12/5 and ν=13/5 are in the k=3 Read-Rezayi phase in the absence…
[Phys. Rev. B 95, 115136] Published Mon Mar 20, 2017

Compactly supported Wannier functions and algebraic K-theory

2017-03-20T10:00:00-04:00

In a tight-binding lattice model with n orbitals (single-particle states) per site, Wannier functions are n-component vector functions of position that fall off rapidly away from some location, and such that a set of them in some sense span all states in a given energy band or set of bands; compactl…
[Phys. Rev. B 95, 115309] Published Mon Mar 20, 2017

Pseudomagnetic helicons

2017-03-20T10:00:00-04:00

Author(s): E. V. Gorbar, V. A. Miransky, I. A. Shovkovy, and P. O. Sukhachov
The existence of pseudomagnetic helicons is predicted for strained Dirac and Weyl materials. The corresponding collective modes are reminiscent of the usual helicons in metals in strong magnetic fields but can exist even without a magnetic field due to a strain-induced background pseudomagnetic fiel…
[Phys. Rev. B 95, 115422] Published Mon Mar 20, 2017

Quantum-continuum simulation of the electrochemical response of pseudocapacitor electrodes under realistic conditions

2017-03-20T10:00:00-04:00

Author(s): Nathan Keilbart, Yasuaki Okada, Aion Feehan, Shin'ichi Higai, and Ismaila Dabo
Pseudocapacitors are energy-storage devices characterized by fast and reversible redox reactions that enable them to store large amounts of electrical energy at high rates. We simulate the response of pseudocapacitive electrodes under realistic conditions to identify the microscopic factors that det…
[Phys. Rev. B 95, 115423] Published Mon Mar 20, 2017

Limits on dynamically generated spin-orbit coupling: Absence of l=1 Pomeranchuk instabilities in metals

2017-03-20T10:00:00-04:00

Author(s): Egor I. Kiselev, Mathias S. Scheurer, Peter Wölfle, and Jörg Schmalian
An ordered state in the spin sector that breaks parity without breaking time-reversal symmetry, i.e., that can be considered dynamically generated spin-orbit coupling, was proposed to explain puzzling observations in a range of different systems. Here, we derive severe restrictions for such a state …
[Phys. Rev. B 95, 125122] Published Mon Mar 20, 2017

Hole-doping-induced melting of spin-state ordering in PrBaCo_{2} O_{5.5+x}

2017-03-20T10:00:00-04:00

Author(s): Ping Miao, Xiaohuan Lin, Sanghyun Lee, Yoshihisa Ishikawa, Shuki Torii, Masao Yonemura, Tetsuro Ueno, Nobuhito Inami, Kanta Ono, Yingxia Wang, and Takashi Kamiyama
The layered perovskite cobaltite RBaCo_{2}O_{5.5} (R: rare-earth elements) exhibits an abrupt temperature-induced metal-insulator transition (MIT) that has been attributed to spin-state ordering (SSO) of Co^{3+} ions. Here we investigate the hole-doping member of PrBaCo_{2}O_{5.5+x} (0≤x≤0.24) with …
[Phys. Rev. B 95, 125123] Published Mon Mar 20, 2017

Nuclear spin relaxation in n-GaAs: From insulating to metallic regime

2017-03-20T10:00:00-04:00

Author(s): M. Vladimirova, S. Cronenberger, D. Scalbert, M. Kotur, R. I. Dzhioev, I. I. Ryzhov, G. G. Kozlov, V. S. Zapasskii, A. Lemaître, and K. V. Kavokin
Nuclear spin relaxation is studied in n-GaAs thick layers and microcavity samples with different electron densities. We reveal that both in metallic samples where electrons are free and mobile, and in insulating samples where electrons are localized, nuclear spin relaxation is strongly enhanced at l…
[Phys. Rev. B 95, 125312] Published Mon Mar 20, 2017

Quantification of scattering loss of III-nitride photonic crystal cavities in the blue spectral range

2017-03-20T10:00:00-04:00

Author(s): Ian Rousseau, Irene Sánchez-Arribas, Kanako Shojiki, Jean-François Carlin, Raphaël Butté, and Nicolas Grandjean
The mechanisms contributing to experimental quality factors of short wavelength (λ=440–480 nm) III-nitride on silicon one-dimensional photonic crystal cavities were quantified. Fluctuations in fundamental and first-order cavity mode wavelength and quality factor were compared over sets of nominally …
[Phys. Rev. B 95, 125313] Published Mon Mar 20, 2017

Enhancement of Auger recombination induced by carrier localization in InGaN/GaN quantum wells

2017-03-20T10:00:00-04:00

Author(s): M. Shahmohammadi, W. Liu, G. Rossbach, L. Lahourcade, A. Dussaigne, C. Bougerol, R. Butté, N. Grandjean, B. Deveaud, and G. Jacopin
The origin of efficiency droop in state-of-the-art quality InGaN/GaN and GaN/AlGaN quantum wells (QWs) grown on various crystal planes is studied by means of time-resolved photoluminescence spectroscopy associated with a precise determination of the QW carrier density. In a first set of experiments,…
[Phys. Rev. B 95, 125314] Published Mon Mar 20, 2017

Topological collective plasmons in bipartite chains of metallic nanoparticles

2017-03-20T10:00:00-04:00

Author(s): Charles A. Downing and Guillaume Weick
We study a bipartite linear chain constituted by spherical metallic nanoparticles, where each nanoparticle supports a localized surface plasmon. The near-field dipolar interaction between the localized surface plasmons gives rise to collective plasmons, which are extended over the whole nanoparticle…
[Phys. Rev. B 95, 125426] Published Mon Mar 20, 2017

Relationship between conductance fluctuation and weak localization in graphene

2017-03-20T10:00:00-04:00

Author(s): D. Terasawa, A. Fukuda, A. Fujimoto, Y. Ohno, Y. Kanai, and K. Matsumoto
The relationship between the universal conductance fluctuation and the weak localization effect in monolayer graphene is investigated. By comparing experimental results with the predictions of the weak localization theory for graphene, we find that the ratio of the elastic intervalley scattering tim…
[Phys. Rev. B 95, 125427] Published Mon Mar 20, 2017

Influence of uniaxial single-ion anisotropy on the magnetic and thermal properties of Heisenberg antiferromagnets within unified molecular field theory

2017-03-17T10:00:00-04:00

Author(s): David C. Johnston
The influence of uniaxial single-ion anisotropy −DS_{z}^{2} on the magnetic and thermal properties of Heisenberg antiferromagnets (AFMs) is investigated. The uniaxial anisotropy is treated exactly and the Heisenberg interactions are treated within unified molecular field theory (MFT) [Phys. Rev. B 9…
[Phys. Rev. B 95, 094421] Published Fri Mar 17, 2017

Theory of multiple-phase competition in pyrochlore magnets with anisotropic exchange with application to Yb_{2} Ti_{2} O_{7} , Er_{2} Ti_{2} O_{7} , and Er_{2} Sn_{2} O_{7}

2017-03-17T10:00:00-04:00

Author(s): Han Yan, Owen Benton, Ludovic Jaubert, and Nic Shannon
The family of magnetic rare-earth pyrochlore oxides R_{2}M_{2}O_{7} plays host to a diverse array of exotic phenomena, driven by the interplay between geometrical frustration and spin-orbit interaction, which leads to anisotropy in both magnetic moments and their interactions. In this article we est…
[Phys. Rev. B 95, 094422] Published Fri Mar 17, 2017

Low-energy spin excitations in (Li_{0.8} Fe_{0.2} )ODFeSe superconductor studied with inelastic neutron scattering

2017-03-17T10:00:00-04:00

Author(s): Mingwei Ma, Lichen Wang, Philippe Bourges, Yvan Sidis, Sergey Danilkin, and Yuan Li
We report an inelastic neutron scattering study of single crystals of (Li_{0.8}Fe_{0.2})ODFeSe. Temperature-dependent low-energy spin excitations are observed near Q=(0.5,0.27,0.5) and equivalent wave vectors symmetrically surrounding Q=(0.5,0.5,0.5) in the 1-Fe Brillouin zone, consistent with a Fer…
[Phys. Rev. B 95, 100504(R)] Published Fri Mar 17, 2017

Thermalization rates in the one-dimensional Hubbard model with next-to-nearest neighbor hopping

2017-03-17T10:00:00-04:00

Author(s): Fabian R. A. Biebl and Stefan Kehrein
We consider a fermionic Hubbard chain with an additional next-to-nearest neighbor hopping term. We study the thermalization rates of the quasimomentum distribution function within a quantum Boltzmann equation approach. We find that the thermalization rates are proportional to the square of the next-…
[Phys. Rev. B 95, 104304] Published Fri Mar 17, 2017

Exceptional points of degeneracy and PT symmetry in photonic coupled chains of scatterers

2017-03-17T10:00:00-04:00

Author(s): Mohamed A. K. Othman, Vincenzo Galdi, and Filippo Capolino
We demonstrate the existence of exceptional points of degeneracy (EPDs) of periodic eigenstates in non-Hermitian coupled chains of dipolar scatterers. Guided modes supported by these structures can exhibit an EPD in their dispersion diagram at which two or more Bloch eigenstates coalesce, in both th…
[Phys. Rev. B 95, 104305] Published Fri Mar 17, 2017

Vectorial spin polarization detection in multichannel spin-resolved photoemission spectroscopy using an Ir(001) imaging spin filter

2017-03-17T10:00:00-04:00

Author(s): Erik D. Schaefer, Stephan Borek, Jürgen Braun, Ján Minár, Hubert Ebert, Katerina Medjanik, Dmytro Kutnyakhov, Gerd Schönhense, and Hans-Joachim Elmers
We report on spin- and angular-resolved photoemission spectroscopy using a high-resolution imaging spin filter based on a large Ir(001) crystal enhancing the effective figure of merit for spin detection by a factor of over 10^{3} compared to standard single-channel detectors. Furthermore, we review …
[Phys. Rev. B 95, 104423] Published Fri Mar 17, 2017

Giant multicaloric response of bulk Fe_{49} Rh_{51}

2017-03-17T10:00:00-04:00

Author(s): Enric Stern-Taulats, Teresa Castán, Antoni Planes, Laura H. Lewis, Radhika Barua, Sabyasachi Pramanick, Subham Majumdar, and Lluís Mañosa
We report on the multicaloric response of the Fe_{49}Rh_{51} alloy under the combined application of hydrostatic pressure and magnetic field. Experimental data are complemented by a mean field model that takes into account the interplay between structural and magnetic degrees of freedom. A large mul…
[Phys. Rev. B 95, 104424] Published Fri Mar 17, 2017

Fano stability diagram of a symmetric triple quantum dot

2017-03-17T10:00:00-04:00

Author(s): Michael Niklas, Andreas Trottmann, Andrea Donarini, and Milena Grifoni
The Fano factor stability diagram of a C_{3v} symmetric triangular quantum dot is analyzed for increasing electron fillings N. At low filling, conventional Poissonian and sub-Poissonian behavior is found. At larger filling, N≥2, a breaking of the electron-hole symmetry is manifested in super-Poisson…
[Phys. Rev. B 95, 115133] Published Fri Mar 17, 2017

Spin-entanglement between two freely propagating electrons: Experiment and theory

2017-03-17T10:00:00-04:00

Author(s): D. Vasilyev, F. O. Schumann, F. Giebels, H. Gollisch, J. Kirschner, and R. Feder

Here, the authors make connection to the foundation of quantum mechanics. As stated by Schrquotodinger, entanglement is “the characteristic trait of quantum mechanics” and seemingly at odds with the description of nature. In this joint experimental and theoretical work, the authors discuss the possibility of spin entanglement of two freely propagating electrons. These have been created by a collision of a spin-polarized primary electron with the Shockley surface state of the Cu(111) surface. The contribution of this state can clearly be identified in the experiment and allows use of its particular features. The electron scattering study done here resembles the scenario envisioned by the seminal works of Einstein-Podolsky-Rosen and Schrquotodinger to work out the peculiar nature of entanglement.

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[Phys. Rev. B 95, 115134] Published Fri Mar 17, 2017

Robustness of Majorana bound states in the short-junction limit

2017-03-17T10:00:00-04:00

Author(s): Doru Sticlet, Bas Nijholt, and Anton Akhmerov
We study the effects of strong coupling between a superconductor and a semiconductor nanowire on the creation of the Majorana bound states, when the quasiparticle dwell time in the normal part of the nanowire is much shorter than the inverse superconducting gap. This “short-junction” limit is releva…
[Phys. Rev. B 95, 115421] Published Fri Mar 17, 2017

Erratum: Universal carrier thermoelectric-transport model based on percolation theory in organic semiconductors [Phys. Rev. B 91, 195205 (2015)]

2017-03-17T10:00:00-04:00

Author(s): Nianduan Lu, Ling Li, and Ming Liu
[Phys. Rev. B 95, 119904] Published Fri Mar 17, 2017

Pressure-induced topological phase transition in the polar semiconductor BiTeBr

2017-03-17T10:00:00-04:00

Author(s): Ayako Ohmura, Yuichiro Higuchi, Takayuki Ochiai, Manabu Kanou, Fumihiro Ishikawa, Satoshi Nakano, Atsuko Nakayama, Yuh Yamada, and Takao Sasagawa
We performed x-ray diffraction and electrical resistivity measurement up to pressures of 5 GPa and the first-principles calculations utilizing experimental structural parameters to investigate the pressure-induced topological phase transition in BiTeBr having a noncentrosymmetric layered structure (…
[Phys. Rev. B 95, 125203] Published Fri Mar 17, 2017

Electron paramagnetic resonance calculations for hydrogenated Si surfaces

2017-03-17T10:00:00-04:00

Author(s): M. Rohrmüller, W. G. Schmidt, and U. Gerstmann
Electron paramagnetic resonance (EPR) signatures, more specifically the elements of the electronic g tensor, are calculated within density functional theory for hydrogenated Si(111), Si(001), Si(113), Si(114), Si(112[over ¯]), and Si(110) surfaces. Thereby both perturbation theory and a more sophist…
[Phys. Rev. B 95, 125310] Published Fri Mar 17, 2017

Quantum properties of the radiation emitted by a conductor in the Coulomb blockade regime

2017-03-17T10:00:00-04:00

Author(s): C. Mora, C. Altimiras, P. Joyez, and F. Portier
We present an input-output formalism describing a tunnel junction strongly coupled to its electromagnetic environment. We exploit it in order to investigate the dynamics of the radiation being emitted and scattered by the junction. We find that the nonlinearity imprinted in the electronic transport …
[Phys. Rev. B 95, 125311] Published Fri Mar 17, 2017

Upward mass transport and alloying during the growth of Co on Cu(111)

2017-03-17T10:00:00-04:00

Author(s): Quang Huy Vu and Karina Morgenstern
Co growth on Cu(111) was investigated at several temperatures between 120 K and 300 K by variable-temperature fast-scanning tunneling microscopy at submonolayer coverage. Islands nucleate heterogeneously at step edges and homogeneously on terraces. The height and area distribution difference between…
[Phys. Rev. B 95, 125423] Published Fri Mar 17, 2017

Quantum behavior of terahertz photoconductivity in silicon nanocrystals networks

2017-03-17T10:00:00-04:00

Author(s): V. Pushkarev, T. Ostatnický, H. Němec, T. Chlouba, F. Trojánek, P. Malý, M. Zacharias, S. Gutsch, D. Hiller, and P. Kužel
Quantum-size effects are essential for understanding the terahertz conductivity of semiconductor nanocrystals, particularly at low temperatures. We derived a quantum mechanical expression for the linear terahertz response of nanocrystals; its introduction into an appropriate effective medium model p…
[Phys. Rev. B 95, 125424] Published Fri Mar 17, 2017

Electron transmission through bilayer graphene: A time-dependent first-principles study

2017-03-17T10:00:00-04:00

Author(s): Hironari Miyauchi, Yoshihiro Ueda, Yasumitsu Suzuki, and Kazuyuki Watanabe
Incident-energy-dependent electron transmittances through single-layer graphene (SLG) and bilayer graphene (BLG) were investigated using time-dependent density functional theory. The transmittances of BLG with two kinds of stacking exhibit an unexpected crossing at a certain incident electron energy…
[Phys. Rev. B 95, 125425] Published Fri Mar 17, 2017

Efficient systematic scheme to construct second-principles lattice dynamical models

2017-03-16T10:00:00-04:00

Author(s): Carlos Escorihuela-Sayalero, Jacek C. Wojdeł, and Jorge Íñiguez
We start from the polynomial interatomic potentials introduced by Wojdeł et al. [J. Phys.: Condens. Matter 25, 305401 (2013)] and take advantage of one of their key features—namely, the linear dependence of the energy on the potential's adjustable parameters—to devise a scheme for the construction o…
[Phys. Rev. B 95, 094115] Published Thu Mar 16, 2017

High accuracy and transferability of a neural network potential through charge equilibration for calcium fluoride

2017-03-16T10:00:00-04:00

Author(s): Somayeh Faraji, S. Alireza Ghasemi, Samare Rostami, Robabe Rasoulkhani, Bastian Schaefer, Stefan Goedecker, and Maximilian Amsler
We investigate the accuracy and transferability of a recently developed high-dimensional neural network (NN) method for calcium fluoride, fitted to a database of ab initio density functional theory (DFT) calculations based on the Perdew-Burke-Ernzerhof (PBE) exchange correlation functional. We call …
[Phys. Rev. B 95, 104105] Published Thu Mar 16, 2017

Magnetic order in four-layered Aurivillus phases

2017-03-16T10:00:00-04:00

Author(s): Axiel Yaël Birenbaum, Andrea Scaramucci, and Claude Ederer
We determine the viability of four-layered Aurivillius phases to exhibit long-range magnetic order above room temperature. We use Monte Carlo simulations to calculate transition temperatures for an effective Heisenberg model containing a minimal set of required couplings. The magnitude of the corres…
[Phys. Rev. B 95, 104419] Published Thu Mar 16, 2017

α−β and β−γ phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect

2017-03-16T10:00:00-04:00

Author(s): T. Nomura, Y. Kohama, Y. H. Matsuda, K. Kindo, and T. C. Kobayashi
The magnetic-field-temperature phase diagram of solid oxygen is investigated by the adiabatic magnetocaloric effect (MCE) measurement with pulsed magnetic fields. Relatively large temperature decrease with hysteresis is observed at just below the β−γ and α−β phase-transition temperatures owing to th…
[Phys. Rev. B 95, 104420] Published Thu Mar 16, 2017

Nonlinear and chaotic magnetization dynamics near bifurcations of the Landau-Lifshitz-Gilbert equation

2017-03-16T10:00:00-04:00

Author(s): Aaron M. Ferona and Robert E. Camley
The behavior of a uniformly magnetized domain of ellipsoidal shape subject to a static external field and oscillatory external driving field is analyzed near bifurcation events. The analysis includes the effects of both linear and circularly polarized driving fields and is performed using numerical …
[Phys. Rev. B 95, 104421] Published Thu Mar 16, 2017

Vogel-Fulcher-Tammann freezing of a thermally fluctuating artificial spin ice probed by x-ray photon correlation spectroscopy

2017-03-16T10:00:00-04:00

Author(s): S. A. Morley, D. Alba Venero, J. M. Porro, S. T. Riley, A. Stein, P. Steadman, R. L. Stamps, S. Langridge, and C. H. Marrows
We report on the crossover from the thermal to the athermal regime of an artificial spin ice formed from a square array of magnetic islands whose lateral size, 30 nm × 70 nm, is small enough that they are dynamic at room temperature. We used resonant magnetic soft x-ray photon correlation spectrosco…
[Phys. Rev. B 95, 104422] Published Thu Mar 16, 2017

Bypassing the energy-time uncertainty in time-resolved photoemission

2017-03-16T10:00:00-04:00

Author(s): Francesco Randi, Daniele Fausti, and Martin Eckstein
The energy-time uncertainty is an intrinsic limit for time-resolved experiments imposing a tradeoff between the duration of the light pulses used in experiments and their frequency content. In standard time-resolved photoemission, this limitation maps directly onto a tradeoff between the time resolu…
[Phys. Rev. B 95, 115132] Published Thu Mar 16, 2017

Raman-like resonant secondary emission causes valley coherence in CVD-grown monolayer MoS_{2}

2017-03-16T10:00:00-04:00

Author(s): Naotaka Yoshikawa, Shuntaro Tani, and Koichiro Tanaka
Monolayer transition metal dichalcogenides are promising materials for “valleytronics.” They have band gaps at energy-degenerate K and K^{′} valleys with opposite spins. Due to the lack of inversion symmetry, electron-hole pairs can be selectively created at K or K^{′} valleys by circularly polarize…
[Phys. Rev. B 95, 115419] Published Thu Mar 16, 2017

Extracting band structure characteristics of GaSb/InAs core-shell nanowires from thermoelectric properties

2017-03-16T10:00:00-04:00

Author(s): Florinda Viñas, H. Q. Xu, and Martin Leijnse
Nanowires with a GaSb core and an InAs shell (and the inverted structure) are interesting for studies of electron-hole hybridization and interaction effects due to the bulk broken band-gap alignment at the material interface. We have used eight-band k·p theory together with the envelope function app…
[Phys. Rev. B 95, 115420] Published Thu Mar 16, 2017