Motivated by neutral excitations in disordered electronic materials and systems of trapped ultracold particles with long-range interactions, we study energy-level statistics of quasiparticles with the power-law hopping Hamiltonian $\propto 1/{r}^{\alpha}$ in a strong random potential. In solid-state systems such quasi...

[Phys. Rev. B 98, 014201] Published Mon Jul 16, 2018

]]>The dynamics of the order fluctuations in the ${\mathrm{AuAgZn}}_{2}$ close to the critical point (${T}_{c}\simeq 609$ K) was observed by coherent x-ray scattering. With the high beam intensity of the ID10 ESRF beamline and with the new pixel detector, the dynamics was measured with a few tens of millisecond resolution. The int...

[Phys. Rev. B 98, 014202] Published Mon Jul 16, 2018

]]>We study many-body localization for a disordered chain of spin-1/2 fermions. When both down and up components are exposed to the same strong disorder, a power-law growth of the entanglement entropy was observed [P. Prelovšek *et al.*, Phys. Rev. B **94**, 241104 (2016)] that suggests that many-body local...

[Phys. Rev. B 98, 014203] Published Mon Jul 16, 2018

]]>A classic Onsager reciprocity relation for Fourier heat conduction in the absence of magnetic fields states that the thermal conductivity tensor in bulk anisotropic solids is symmetric. However, since Fourier's law fails in thin dielectric films due to ballistic phonon transport effects, it is natur...

[Phys. Rev. B 98, 014304] Published Mon Jul 16, 2018

]]>In the theory of antiferromagnetism, the staggered field—an external magnetic field that alternates in sign on atomic length scales—is used to select the classical Néel state from a quantum magnet but justification is missing. This work examines, within the decoherence framework, whether repeated *lo...*

[Phys. Rev. B 98, 014416] Published Mon Jul 16, 2018

]]>In this paper we present a comprehensive study of the spontaneous currents in time-reversal symmetry breaking (TRSB) multicomponent superconductors with cubic crystalline symmetry. We argue, not limiting to cubic lattices, that spontaneous current on certain high-symmetry surfaces can exist *only if* ...

[Phys. Rev. B 98, 014511] Published Mon Jul 16, 2018

]]>Intra-unit cell magnetic order has been observed in four different families of high-temperature superconductors from polarized neutron diffraction experiments and supported by several other techniques. That order, which does not break translation symmetry, is consistent with the predicted orbital mo...

[Phys. Rev. B 98, 016501] Published Mon Jul 16, 2018

]]>The issues raised in the preceding comment of Bourges *et al.* [Phys. Rev. B **98**, 016501 (2018)], are shown to be unfounded. We highlight the complications caused by inhomogeneous beam polarization that can occur when using polarized neutron diffraction to detect small magnetic moments.

[Phys. Rev. B 98, 016502] Published Mon Jul 16, 2018

]]>[Phys. Rev. B 98, 019901] Published Mon Jul 16, 2018

]]>[Phys. Rev. B 98, 019902] Published Mon Jul 16, 2018

]]>We derive a quantum-mechanical formula of the orbital magnetic quadrupole moment (MQM) in periodic systems by using the gauge-covariant gradient expansion. This formula is valid for insulators and metals at zero and nonzero temperature. We also prove a direct relation between the MQM and magnetoelec...

[Phys. Rev. B 98, 020407(R)] Published Mon Jul 16, 2018

]]>In an antiferromagnet (AF) with uniaxial anisotropy, spin-up and spin-down magnons coexist and form an intrinsic degree of freedom resembling electrons. When polarized by an adjacent ferromagnet (F), a magnonic pure spin current can be thermally generated in an AF. We explore thermal magnon transpor...

[Phys. Rev. B 98, 020408(R)] Published Mon Jul 16, 2018

]]>The coherence of an electronic spin in a semiconductor quantum dot decays due to its interaction with the bath of nuclear spins in the surrounding isotopes. This effect can be reduced by subjecting the system to an external magnetic field and by applying optical pulses. By repeated pulses in long tr...

[Phys. Rev. B 98, 024305] Published Mon Jul 16, 2018

]]>Anomalous Hall effect in epitaxially grown $L{1}_{0}$-ordered FePd and FePt films on MgO(001) has been investigated as a function of the film thickness ($d$). It is found that the anomalous Hall resistivity can be described by conventional scaling law, i.e., ${\rho}_{\mathrm{AH}}=a{\rho}_{xx}+b{\rho}_{xx}^{2}$ with longitudinal resistivity ${\rho}_{xx}$. ...

[Phys. Rev. B 98, 024413] Published Mon Jul 16, 2018

]]>We use a second-order rotational invariant Green's-function method (RGM) and the high-temperature expansion (HTE) to calculate the thermodynamic properties of the kagome-lattice spin-$S$ Heisenberg antiferromagnet with nearest-neighbor exchange $J$. While the HTE yields accurate results down to temperat...

[Phys. Rev. B 98, 024414] Published Mon Jul 16, 2018

]]>Superconducting gap structure was probed in type-II Dirac semimetal ${\mathrm{PdTe}}_{2}$ by measuring the London penetration depth using the tunnel diode resonator technique. At low temperatures, the data for two samples are well described by a weak-coupling exponential fit yielding $\lambda (T=0)=230$ nm as the only fit p...

[Phys. Rev. B 98, 024508] Published Mon Jul 16, 2018

]]>We study $\mathrm{Nb}-{\mathrm{AlO}}_{x}$-Nb Josephson junctions (JJs) with a phase-discontinuity $\kappa $ created by a pair of current injectors attached to one of the Nb electrodes. For $\kappa \approx \pi $ the Josephson potential energy $U$ as a function of the average phase $\psi $ across the JJ has the form of a $2\pi $-periodic double-well potential. Thu...

[Phys. Rev. B 98, 024509] Published Mon Jul 16, 2018

]]>When a 2D superconductor is subjected to a strong in-plane magnetic field, Zeeman polarization of the Fermi surface can give rise to inhomogeneous FFLO order with a spatially modulated gap. Further increase of the magnetic field eventually drives the system into a normal metal state. Here, we perfor...

[Phys. Rev. B 98, 024510] Published Mon Jul 16, 2018

]]>The square lattices formed by main-group elements such as Bi, Sb, Sn, and Si in layered materials have attracted a lot of interest, since they can create rich topological phases. In this paper, we report the slightly distorted square lattice of Sn in a noncentrosymmetric compound ${\mathrm{YSn}}_{2}$ generates mult...

[Phys. Rev. B 98, 035117] Published Mon Jul 16, 2018

]]>The thermalization of one-dimensional quantum systems may be severely slowed by weak links, e.g., by the Griffiths regions that dominate the long-time dynamics of a system close to the many-body-localization transition. Here, the authors construct universal coarse-grained descriptions for entanglement production and for the dynamics of quantum operators in systems with weak links. They reveal unexpected differences between these processes (for example, entanglement growth can be slower than linear in time even when operators spread ballistically). The universal physics is explained using simple classical effective models. The authors’ analysis of the spreading of quantum information and of conserved quantities shows that thermalization in the presence of weak links has a rich structure, featuring multiple dynamic length scales that diverge with different powers of time.

[Phys. Rev. B 98, 035118] Published Mon Jul 16, 2018

]]>We investigate in-gap states emerging when a single $3d$ transition metal impurity is embedded in topological insulators (${\mathrm{Bi}}_{2}{\mathrm{Te}}_{3}$ and ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$). We use a combined approach relying on first-principles calculations and an Anderson impurity model. By computing the local density of states of Cr, Mn, Fe, and ...

[Phys. Rev. B 98, 035119] Published Mon Jul 16, 2018

]]>We report an experimental and theoretical study of the electronic band structure and Fermi surfaces (FSs) of ${\mathrm{V}}_{2}\mathrm{AlC}$ single crystals using angle-resolved photoemission spectroscopy and density functional theory (DFT) calculations. We provide evidence of the existence of equivalent, complex hole FSs wi...

[Phys. Rev. B 98, 035120] Published Mon Jul 16, 2018

]]>The nonlocal response of chiral electron fluid in a semi-infinite Weyl semimetal slab with the electric current source and drain attached to its surface is studied by using the consistent hydrodynamic framework. It is found that the Chern-Simons terms lead to a spatial asymmetry of the electron flow...

[Phys. Rev. B 98, 035121] Published Mon Jul 16, 2018

]]>The interaction of excitons with phonons governs energy relaxation, dephasing, and optical transition line broadening with temperature in two-dimensional (2D) materials. Here, the authors observe and study unusual high-energy tails in both absorption and emission extending over several meV in energy at low temperatures. They develop a theory of the effect and show that the coupling between acoustic phonons and excitons lies at the origin for the observed high-energy tails. This work demonstrates that the exciton-phonon coupling in 2D crystals is more efficient as compared with conventional semiconductor structures, such as GaAs/AlGaAs quantum wells.

[Phys. Rev. B 98, 035302] Published Mon Jul 16, 2018

]]>We show that the appropriate on-off switching of Josephson coupling between exciton-polaritons in coupled semiconductor microcavities can reveal the full capacity for generating entanglement with a recently proposed method which essentially enhances the nonlinearity of the system. The improvement ac...

[Phys. Rev. B 98, 035303] Published Mon Jul 16, 2018

]]>Graphene has been widely used to construct low-resistance van der Waals (vdW) contacts to other two-dimensional (2D) materials. However, a rise of graphene's electron temperature under a current flow has not been seriously considered in many applications. Owing to its small electronic heat capacity ...

[Phys. Rev. B 98, 035422] Published Mon Jul 16, 2018

]]>We study the optical tunability of the charge carrier type in InAs/GaSb double quantum wells with its type-II broken band alignment and inverted band structure. Under constant optical excitation, the majority charge carrier type switches from electron to hole. Within the majority charge carrier type...

[Phys. Rev. B 98, 041301(R)] Published Mon Jul 16, 2018

]]>Spin-resolved band structures of $L$-gap surface states on Ag(111) and Cu(111) are investigated by spin- and angle-resolved photoelectron spectroscopy (SARPES) with a vacuum-ultraviolet laser. The observed spin textures of the Ag(111) and Cu(111) surface states agree with that expected by the conventi...

[Phys. Rev. B 98, 041404(R)] Published Mon Jul 16, 2018

]]>Motivated by the rapid experimental progress on the spin-orbit-coupled Mott insulators, we propose and study a generic spin model that describes the interaction between the non-Kramers doublets on a triangular lattice and is relevant for triangular lattice rare-earth magnets. We predict that the sys...

[Phys. Rev. B 98, 045119] Published Mon Jul 16, 2018

]]>The spin of an electron is an inherently quantum-mechanical object as it is quantized as half-integer values in the unit of the Planck’s constant. Indeed, a variety of magnetism phenomena arising from interacting spins in crystalline solids are direct consequences of this quantization. Yet the present study reveals that the *classical* dynamics of spins in frustrated magnets with strong spin-orbit coupling can describe their quantum dynamics at finite temperature. The authors show that this peculiar classical-quantum correspondence originates from the constraints on the relativemotion of spins on the crystalline lattice.

[Phys. Rev. B 98, 045121] Published Mon Jul 16, 2018

]]>Exciton condensation, a Bose-Einstein-like condensation of excitons, was recently reported in an electronic double layer (EDL) of graphene. We show that a universal quantum signature for exciton condensation can be used to both identity and quantify exciton condensation in molecular systems from dir...

[Phys. Rev. B 98, 045122] Published Mon Jul 16, 2018

]]>ABA-stacked trilayer graphene (TLG), the simplest system consisting of both monolayerlike and bilayerlike Dirac fermions, is expected to exhibit many interesting broken-symmetry quantum Hall states and interaction-induced phenomena. However, difficulties in microscopically identifying the stacking o...

[Phys. Rev. B 98, 045413] Published Mon Jul 16, 2018

]]>We study the quantum corrections to the conductivity of the two-dimensional disordered interacting electron system in the diffusive regime due to inelastic scattering off rare magnetic impurities. We focus on the case of very different $g$ factors for electrons and magnetic impurities. Within the Born...

[Phys. Rev. B 98, 045414] Published Mon Jul 16, 2018

]]>We propose a one-dimensional nonlinear system of coupled anharmonic oscillators that dynamically undergoes a topological transition switching from the disordered and topologically trivial phase to the nontrivial one due to the spontaneous symmetry breaking. The topological transition is accompanied ...

[Phys. Rev. B 98, 045415] Published Mon Jul 16, 2018

]]>We study the electrical conductance in single-mode quantum wires with Rashba spin-orbit interaction subjected to externally applied magnetic fields in the regime in which the ratio of spin-orbit momentum to the Fermi momentum is close to an odd integer, so that a combined effect of multi-electron in...

[Phys. Rev. B 98, 045416] Published Mon Jul 16, 2018

]]>We study the tunneling conductance of a ballistic normal metal/ferromagnet/spin-triplet superconductor junction using the extended Blonder-Tinkham-Klapwijk formalism as a model for a $c$-axis-oriented Au/${\mathrm{SrRuO}}_{3}\text{/}{\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ junction. We compare chiral $p$-wave (CPW) and helical $p$-wave (HPW) pair potentials, ...

[Phys. Rev. B 98, 014508] Published Fri Jul 13, 2018

]]>We reexamined the rotation-induced effect observed in solid ${}^{4}\mathrm{He}$ by using a rigid two-frequency torsional oscillator (TO). The previous rotation experiments reported the rotation-induced suppression of the “nonclassical” TO response that was interpreted as evidence of irrotational bulk superfluidity ...

[Phys. Rev. B 98, 014509] Published Fri Jul 13, 2018

]]>A Ginzburg-Landau free energy for a superconducting chiral $p$-wave order parameter is derived from a two-dimensional tight-binding lattice model with weak spin-orbit coupling included as a general symmetry-breaking field. Superconductivity is accounted for by a BCS-type nearest-neighbor opposite-spin...

[Phys. Rev. B 98, 014510] Published Fri Jul 13, 2018

]]>Resistivity $\rho $, thermopower $\mathcal{S}$, and thermal conductivity $\kappa $ were measured simultaneously on a set of CoFe alloy films. Variation of the Co content ${x}_{\mathrm{Co}}$ allows for a systematic tuning of the Fermi level through the band structure, and the study of the interplay between electronic and magnetic contributio...

[Phys. Rev. B 98, 020406(R)] Published Fri Jul 13, 2018

]]>The recent discovery of superconductivity in ${\mathrm{NaSn}}_{2}{\mathrm{As}}_{2}$ with a van der Waals layered structure raises immediate questions on its pairing mechanism and underlying electronic structure. Here, we present measurements of the temperature-dependent magnetic penetration depth $\lambda \left(T\right)$ in single crystals of ${\mathrm{NaSn}}_{2}{\mathrm{...}}_{}$

[Phys. Rev. B 98, 020503(R)] Published Fri Jul 13, 2018

]]>We report inelastic light scattering results on the stoichiometric and fully ordered superconductor ${\mathrm{CaKFe}}_{4}{\mathrm{As}}_{4}$ as a function of temperature and light polarization. In the energy range between 10 and 315 ${\mathrm{cm}}^{-1}$ (1.24 and 39.1 meV) we observe the particle-hole continuum above and below the superconductin...

[Phys. Rev. B 98, 020504(R)] Published Fri Jul 13, 2018

]]>Radiation can drive the electrons in a material out of thermal equilibrium with the nuclei, producing hot, transient electronic states that modify the interatomic potential energy surface. We present a rigorous formulation of two-temperature molecular dynamics that can accommodate these electronic e...

[Phys. Rev. B 98, 024304] Published Fri Jul 13, 2018

]]>We employed x-ray absorption spectroscopy and x-ray magnetic circular dichroism to study the magnetic properties of single rare-earth (RE) atoms (Nd, Tb, Dy, Ho, and Er) adsorbed on the graphene/Ir(111) surface. The interaction of RE atoms with graphene results for Tb in a trivalent state with $4{f}^{n-1}$...

[Phys. Rev. B 98, 024412] Published Fri Jul 13, 2018

]]>We study the electronic structure of ${\mathrm{WTe}}_{2}$ thin films with different thicknesses. High-quality thin-film samples are obtained with carrier mobility up to 5000 ${\mathrm{cm}}^{2}\phantom{\rule{0.16em}{0ex}}{\mathrm{V}}^{-1}\phantom{\rule{0.16em}{0ex}}{\mathrm{s}}^{-1}$, which enables us to resolve the four main Fermi pockets from Shubnikov–de Haas (SdH) oscillations. Angle-resolved SdH oscillations ...

[Phys. Rev. B 98, 035115] Published Fri Jul 13, 2018

]]>The $t-J$ model is a standard model of strongly correlated electrons, often studied in the context of high-${T}_{c}$ superconductivity. However, most studies of this model neglect three-site terms, which appear at the same order as the superexchange $J$. As these terms correspond to pair hopping, they are expe...

[Phys. Rev. B 98, 035116] Published Fri Jul 13, 2018

]]>Effects that are not captured by the generalized-gradient density-functional theory have a prominent effect on the structural binding and on the electronic and optical properties of reduced-dimensional and weakly bound materials. Here, we report the exfoliation energy of selenium and tellurium atomi...

[Phys. Rev. B 98, 035420] Published Fri Jul 13, 2018

]]>We study the temperature-dependent corrections to the conductance due to electron-electron ($e-e$) interactions in clean two-dimensional conductors, such as lightly doped graphene or other Dirac matter. We use semiclassical Boltzmann kinetic theory to solve the problem of collision-dominated transport...

[Phys. Rev. B 98, 035421] Published Fri Jul 13, 2018

]]>[Phys. Rev. B 98, 039901] Published Fri Jul 13, 2018

]]>[Phys. Rev. B 98, 039902] Published Fri Jul 13, 2018

]]>AB-stacked bilayer graphene with a tunable electronic band gap in excess of the optical phonon energy presents an interesting active medium, and we consider such a theoretical possibility in this Rapid Communication. We argue the possibility of a highly resonant optical gain in the vicinity of the a...

[Phys. Rev. B 98, 041403(R)] Published Fri Jul 13, 2018

]]>We develop the theory of transverse magnetoresistance in layered quasi-two-dimensional (Q2D) metals. Using the Kubo formula and harmonic expansion, we calculate intralayer conductivity in a magnetic field perpendicular to conducting layers. The analytical expressions for the amplitudes and phases of...

[Phys. Rev. B 98, 045118] Published Fri Jul 13, 2018

]]>We find that the topological phase transition in a chiral ladder is characterized by dramatic signatures in many body entanglement entropy between the legs, close to half filling. The value of entanglement entropy for various fillings close to half filling is identical, at the critical point, but sp...

[Phys. Rev. B 98, 045120] Published Fri Jul 13, 2018

]]>In this work we present a high-throughput first-principles study of elastic properties of bulk and monolayer materials mainly using the vdW-DF-optB88 functional. We discuss the trends on the elastic response with respect to changes in dimensionality. We identify a relation between exfoliation energy...

[Phys. Rev. B 98, 014107] Published Thu Jul 12, 2018

]]>We examine instabilities of the plateau phases in the spin-$\frac{1}{2}$ kagome lattice antiferromagnet in an applied field by means of degenerate perturbation theory, and find some emergent supersolid phases below the $m=\frac{5}{9}$ plateau. The wave functions of the plateau phases in a magnetic field have the particul...

[Phys. Rev. B 98, 014415] Published Thu Jul 12, 2018

]]>We report intrinsic tunneling data for mesa structures fabricated on three over- and optimally-doped ${\mathrm{Bi}}_{2.15}{\mathrm{Sr}}_{1.85}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\delta}$ crystals with transition temperatures of 86–78 K and 0.16–0.19 holes per ${\mathrm{CuO}}_{2}$ unit, for a wide range of temperature ($T$) and applied magnetic field ($H$), primarily focusing on one...

[Phys. Rev. B 98, 014507] Published Thu Jul 12, 2018

]]>We report that the spin-orbit torque (SOT) in a Co/Pt structure is significantly enhanced by partial oxidation of the Co-side interface. The interface-oxidized and unoxidized Co/Pt samples were prepared to compare the SOTs, which were determined using the harmonic Hall measurement. Even though an in...

[Phys. Rev. B 98, 020405(R)] Published Thu Jul 12, 2018

]]>We report on the magnetic, thermodynamic, dielectric, and pyroelectric measurements on the hitherto unreported $\mathrm{Fe}{}_{4}\mathrm{Ta}{}_{2}{\mathrm{O}}_{9}$. This system is seen to exhibit a series of magnetic transitions, many of which are coupled to the emergence of ferroelectric order, making $\mathrm{Fe}{}_{4}\mathrm{Ta}{}_{2}{\mathrm{O}}_{9}$ the only genuine multiferroic i...

[Phys. Rev. B 98, 024410] Published Thu Jul 12, 2018

]]>Using random-phase approximation spin-fluctuation theory, we study the influence of the hybridization between iron $d$ orbitals and pnictide $p$ orbitals on the superconducting pairing state in iron-based superconductors. The calculations are performed for a 16-orbital Hubbard-Hund tight-binding model o...

[Phys. Rev. B 98, 024507] Published Thu Jul 12, 2018

]]>We perform a comparative study of the electronic structures and electrical resistivity properties of black $\left(A17\right)$ and of pressurized gray $\left(A7\right)$ phosphorus, showing band-selective Kondoesque electronic reconstruction in these layered $p$-band phosphorus allotropes. Based on density functional dynamical m...

[Phys. Rev. B 98, 035114] Published Thu Jul 12, 2018

]]>We show that the boundary charge and spin can be used as alternative signatures of the topological phase transition in topological models such as semiconducting nanowires with strong Rashba spin-orbit interaction in the presence of a magnetic field and in proximity to an $s$-wave superconductor. We id...

[Phys. Rev. B 98, 035419] Published Thu Jul 12, 2018

]]>Employing the self-learning quantum Monte Carlo algorithm, we investigate the frustrated transverse-field triangle-lattice Ising model coupled to a Fermi surface. Without fermions, the spin degrees of freedom undergo a second-order quantum phase transition between paramagnetic and clock-ordered phas...

[Phys. Rev. B 98, 045116] Published Thu Jul 12, 2018

]]>With the aim of constructing an electronic structure approach that systematically goes beyond the GW and random phase approximation (RPA) we introduce a vertex correction based on the exact-exchange (EXX) potential of time-dependent density functional theory. The EXX vertex function is constrained t...

[Phys. Rev. B 98, 045117] Published Thu Jul 12, 2018

]]>Nonideal topological insulator (TI) films in which the bulk states are not insulating due to unintentional doping exhibit strong surface–bulk coupling. Such surface–bulk coupling can further induce intersurface coupling that affects the electrical conductivity of the TI films through a quantum inter...

[Phys. Rev. B 98, 045411] Published Thu Jul 12, 2018

]]>We present simulations of quantum transport in graphene *p-n* junctions $\left(pn\mathrm{Js}\right)$ in which moiré superlattice potentials are incorporated to demonstrate the interplay between $pn\mathrm{Js}$ and moiré superlattice potentials. It is shown that the longitudinal and Hall resistivity maps can be strongly modulated by t...

[Phys. Rev. B 98, 045412] Published Thu Jul 12, 2018

]]>Spin-crossover (SCO) solids have been studied from magnetic and structural viewpoints under the form of powder, single crystals, and nanoparticles. Recently, an important progress made in chemistry allowed the design of spin-crossover nanocomposites, combining the properties of two types of spin-cro...

[Phys. Rev. B 98, 014106] Published Wed Jul 11, 2018

]]>A degeneracy line in parameter space, at which the energy gap closes up, can be the boundary separating either two topological quantum phases or two conventional phases, depending on the surface containing the line. We study the topological feature of degeneracy line in parameter space via a dimeriz...

[Phys. Rev. B 98, 014303] Published Wed Jul 11, 2018

]]>The high critical temperature superconductor lanthanum barium copper oxide (${\mathrm{La}}_{2-x}{\mathrm{Ba}}_{x}{\mathrm{CuO}}_{4}$) exhibits a strong anomaly in critical temperature at 1/8th doping, nematicity, and other interesting properties. We report here scanning superconducting quantum interference device imaging of the magnetic field...

[Phys. Rev. B 98, 014506] Published Wed Jul 11, 2018

]]>We provide a detailed formulation of the recently proposed variational approach [Y. Ashida, T. Shi, M.-C. Bañuls, J. I. Cirac, and E. Demler, Phys. Rev. Lett. **121**, 026805 (2018)] to study ground-state properties and out-of-equilibrium dynamics for generic quantum spin-impurity systems. Motivated by ...

[Phys. Rev. B 98, 024103] Published Wed Jul 11, 2018

]]>Disorder-induced Anderson localization in quasiparticle transport is a challenging problem to address, even more so in the presence of dissipation, as the symptoms of disorder-induced localization are very closely simulated by the absorption in a system. Following up on recent experimental studies, ...

[Phys. Rev. B 98, 024202] Published Wed Jul 11, 2018

]]>It is shown that the temperature of the resistive transition ${T}_{r}$ of a superconducting film can be increased by a thin superconducting or normal overlayer. For instance, deposition of a highly conductive thin overlayer onto a dirty superconducting film can give rise to an “antiproximity effect,” which...

[Phys. Rev. B 98, 024506] Published Wed Jul 11, 2018

]]>We study the photoexcitation dynamics of correlated band insulators, using nonequilibrium dynamical mean-field theory for the ionic Hubbard model. We find two distinct behaviors, depending on the ratio of the on-site interaction $U$ and the bare band gap $\mathrm{\Delta}$. For small interactions, the relaxation is ch...

[Phys. Rev. B 98, 035113] Published Wed Jul 11, 2018

]]>The unique zero-energy Landau level of graphene has a particle-hole symmetry in the bulk, which is lifted at the boundary leading to a splitting into two chiral edge modes. It has long been theoretically predicted that the splitting of the zero-energy Landau level inside the *bulk* can lead to many in...

[Phys. Rev. B 98, 035418] Published Wed Jul 11, 2018

]]>The self-learning Monte Carlo method (SLMC), using a trained effective model to guide Monte Carlo sampling processes, is a powerful general-purpose numerical method recently introduced to speed up simulations in (quantum) many-body systems. In this Rapid Communication, we further improve the efficie...

[Phys. Rev. B 98, 041102(R)] Published Wed Jul 11, 2018

]]>The recent discovery of Weyl and Dirac semimetals is one of the most important progresses in condensed matter physics. Among the very few available tools to characterize Weyl semimetals through electrical transport, negative magnetoresistance is most commonly used. Considering the shortcomings of th...

[Phys. Rev. B 98, 041103(R)] Published Wed Jul 11, 2018

]]>We study the optical response of two coupled oriented dipoles with the dimer axis perpendicular to the wave vector of light by analyzing how their scattering matrix can be decomposed. The scattering matrix can be written as a linear combination of three terms with a clear physical meaning: one for e...

[Phys. Rev. B 98, 045410] Published Wed Jul 11, 2018

]]>The quasi-two-dimensional nature of ${\mathrm{LaNiO}}_{3}$ (LNO) thin films on ${\mathrm{SrTiO}}_{3}$(001) (STO) and ${\mathrm{LaAlO}}_{3}$(001) (LAO) substrates is examined. Although both samples undergo a metal-insulator transition with decreasing thickness, the spatial distributions of the insulating phase within the films differ from each oth...

[Phys. Rev. B 98, 014105] Published Tue Jul 10, 2018

]]>Topological defects with symmetry-breaking phase transitions have captured much attention. A vortex generated by topological defects exhibits exotic properties, and its flow direction can be switched by altering the spin configurations. Contrary to electromagnetic and acoustic domains, the topologic...

[Phys. Rev. B 98, 014302] Published Tue Jul 10, 2018

]]>High-momentum spin waves (magnons) in ultrathin films of cobalt and iron have been explored thoroughly using inelastic scattering of low-energy electrons. The search for magnons in ultrathin nickel films failed, however, although high-energy magnons do exist in bulk nickel. The failure might be due ...

[Phys. Rev. B 98, 014413] Published Tue Jul 10, 2018

]]>The antiferromagnetic Heisenberg chain is expected to have an extended symmetry, $[\mathrm{SU}\left(2\right)\times \mathrm{SU}\left(2\right)]/{\mathrm{Z}}_{2}$, in the infrared limit whose physical interpretation is that the spin and dimer order parameters form the components of a common four-dimensional pseudovector. Here we numerically investigate this emerg...

[Phys. Rev. B 98, 014414] Published Tue Jul 10, 2018

]]>The magnetic structure of ${\mathrm{TbMn}}_{2}{\mathrm{O}}_{5}$ and ${\mathrm{DyMn}}_{2}{\mathrm{O}}_{5}$ multiferroics has been studied by high-pressure neutron diffraction in a large pressure range up to 6.6 GPa. In both cases, we observe a pressure-induced commensurate magnetic phase with propagation vector $\left(\frac{1}{2}\phantom{\rule{0.16em}{0ex}}0\phantom{\rule{0.16em}{0ex}}\frac{1}{2}\right)$, growing with pressure at the expense of t...

[Phys. Rev. B 98, 024408] Published Tue Jul 10, 2018

]]>Recent demonstrations on manipulating antiferromagnetic (AF) order have triggered a growing interest in antiferromagnetic metal, and potential high-density spintronic applications demand further improvements in the anisotropic magnetoresistance (AMR). The antiferromagnetic semimetals (AFS) are newly...

[Phys. Rev. B 98, 024409] Published Tue Jul 10, 2018

]]>We investigate the vortex lattice and vortex bound states in ${\mathrm{CsFe}}_{2}{\mathrm{As}}_{2}$ single crystals by scanning tunneling microscopy/spectroscopy (STM/STS) under various magnetic fields. A possible structural transition or crossover of vortex lattice is observed with the increase of magnetic field, i.e., the vort...

[Phys. Rev. B 98, 024505] Published Tue Jul 10, 2018

]]>Fractons are gapped pointlike excitations in $d=3$ topological ordered phases whose motion is constrained. They have been discovered in several gapped models but a unifying physical mechanism for generating them is still missing. It has been noticed that in symmetric-tensor $\mathrm{U}\left(1\right)$ gauge theories, charge...

[Phys. Rev. B 98, 035111] Published Tue Jul 10, 2018

]]>In this work, we introduce a new type of topological order that is protected by subsystem symmetries that act on lower-dimensional subsets of lattice many-body system, e.g., along lines or planes in a three-dimensional system. The symmetry groups for such systems exhibit a macroscopic number of gene...

[Phys. Rev. B 98, 035112] Published Tue Jul 10, 2018

]]>This paper explores different mechanisms that induce thermal rectification in the nanoscale. The presence of interacting energy channels combined with simple asymmetries is sufficient for promoting the desired behavior. We use simple quantum dot configurations, identifying the basic properties that ...

[Phys. Rev. B 98, 035414] Published Tue Jul 10, 2018

]]>We study the electronic thermal drag in two different Coulomb-coupled systems, the first one composed of two Coulomb-blockaded metallic islands and the second one consisting of two parallel quantum wires. The two conductors of each system are electrically isolated and placed in the two circuits (the...

[Phys. Rev. B 98, 035415] Published Tue Jul 10, 2018

]]>The Peierls substitution in the energy functions of a carbon nanotube's sub-bands is carried out for a carbon nanotube of arbitrary chiral indices subjected to a perpendicular uniform magnetic field. The Peierls substitution represents a zeroth-order term of the asymptotically convergent power serie...

[Phys. Rev. B 98, 035416] Published Tue Jul 10, 2018

]]>Quasi-two-dimensional manganese thiophosphate, $\mathrm{MnP}{\mathrm{S}}_{3}$, is interesting due to its two-dimensional antiferromagnetic structure observed at low temperatures as well as possible technological applications. While the spectroscopic properties of bulk $\mathrm{MnP}{\mathrm{S}}_{3}$ structures have been extensively studied, the spec...

[Phys. Rev. B 98, 035417] Published Tue Jul 10, 2018

]]>The metastable 1$T$ polymorph of NbSe${}_{2}$ was recently successfully synthesized in monolayer form. The observation of a superlattice and insulating behavior suggests an analogy with 1$T$-TaS${}_{2}$, an extensively investigated system known for its complex phase diagram that has recently been suggested to realize a possible quantum spin-liquid ground state. Here, a series of $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ techniques, from density functional theory (DFT) to dynamical mean-field theory (DMFT), finds that the star-of-David phase in 1$T$-NbSe${}_{2}$ is the most stable commensurate charge density wave phase and that its electronic character is a Mott insulator. DFT calculations also predict weak nearest-neighbor ferromagnetic coupling, which would disfavor a quantum spin liquid phase but suggest a flat-band ferromagnetism scenario.

[Phys. Rev. B 98, 045114] Published Tue Jul 10, 2018

]]>Perovskite nickelate heterostructures consisting of single unit cells of ${\mathrm{EuNiO}}_{3}$ and ${\mathrm{LaNiO}}_{3}$ have been grown on a set of single crystalline substrates by pulsed laser interval deposition to investigate the effect of epitaxial strain on electronic and magnetic properties at the extreme interface limit....

[Phys. Rev. B 98, 045115] Published Tue Jul 10, 2018

]]>Atomically thin layers of transition metal dichalcogenides (TMDCs) exhibit exceptionally strong Coulomb interaction between charge carriers due to the two-dimensional carrier confinement in connection with weak dielectric screening. The van der Waals nature of interlayer coupling makes it easy to in...

[Phys. Rev. B 98, 045304] Published Tue Jul 10, 2018

]]>We study entanglement dynamics in the nearest-neighbor fermionic chain that is subjected to both dc and ac electric fields. The dynamics gives the well-known Bloch oscillations in the dc field case provided that the system size is larger than the Bloch length, whereas in the ac field case the entrop...

[Phys. Rev. B 98, 045408] Published Tue Jul 10, 2018

]]>The low-temperature regime of charge-qubit decoherence due to its Coulomb interaction with electrons tunneling through Luttinger liquid quantum-point contact (QPC) is investigated. The study is focused on quantum detector properties of Luttinger liquid QPC. Earlier results on related problems were a...

[Phys. Rev. B 98, 045409] Published Tue Jul 10, 2018

]]>The lattice dynamics of members of the ${M}_{2}{\mathrm{Mo}}_{6}{\mathrm{Se}}_{6}$ family of materials with guest ions $M=\mathrm{K}$, Rb, Cs, In, and Tl has been studied using inelastic x-ray scattering and Raman spectroscopy at room temperature, as well as by *ab initio* calculations. We find a good match between calculations and experiment, bo...

[Phys. Rev. B 98, 014104] Published Mon Jul 09, 2018

]]>Tailoring and controlling magnetic properties is an important factor for materials design. Here, we present a case study for Ni-based Heusler compounds of the type ${\mathrm{Ni}}_{2}YZ$ with $Y=$ Mn, Fe, Co and $Z=$ B, Al, Ga, In, Si, Ge, Sn based on first-principles electronic structure calculations. These compounds a...

[Phys. Rev. B 98, 014411] Published Mon Jul 09, 2018

]]>Herein, we have systematically reported the synthesis, structure, magnetism, and electrical/thermal transport properties of $\mathrm{AsNC}{\mathrm{r}}_{3}$. Tetragonal-antiperovskite metallic $\mathrm{AsNC}{\mathrm{r}}_{3}$ exhibits a second-order ferromagnetic (FM)-paramagnetic (PM) transition around 243 K, where the resistivity and specific heat ...

[Phys. Rev. B 98, 014412] Published Mon Jul 09, 2018

]]>First-principles calculations of ionic-liquid-gated (Li,Fe)OHFeSe suggest a metal-insulator transition at a nominal Li/Fe ratio of 75/25 in the (Li,Fe)OH layer. While doping increases Fermi energy, the formation of an antiferromagnetic bicollinear phase is the key for the transition. It is expected ...

[Phys. Rev. B 98, 014504] Published Mon Jul 09, 2018

]]>Recent experimental evidences point to rotation symmetry-breaking superconductivity in doped ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$, where the relevant order parameter belongs to a two-component odd-parity representation ${E}_{u}$ of the crystal point group. The ${E}_{u}$ channel admits two possible phases, the nematic phase, that well explains...

[Phys. Rev. B 98, 014505] Published Mon Jul 09, 2018

]]>Transition-metal dichalcogenides (TMDs) exhibit a remarkable exciton landscape with a majority of optically forbidden dark excitonic states. Here, the authors present a study that combines microscopic theory with femtosecond infrared spectroscopy. It allows to map the excitonic landscape of an arbitrary TMD material by investigating the temporal evolution of the intraexcitonic 1$s$-2$p$ transition. By resolving the optical response shortly after the excitation and after the exciton thermalization, the authors reveal the relative position of bright and dark excitonic states. The theoretical prediction is confirmed on the exemplary WSe${}_{2}$ material as shown in the picture.

[Phys. Rev. B 98, 020301(R)] Published Mon Jul 09, 2018

]]>Superconducting qubits are hampered by flux noise produced by surface spins from a variety of microscopic sources. Recent experiments indicated that hydrogen (H) atoms may be one of those sources. Using density functional theory calculations, we report that H atoms either embedded in, or adsorbed on...

[Phys. Rev. B 98, 020403(R)] Published Mon Jul 09, 2018

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