We provide a versatile analytical framework for calculating the dynamics of a spin system in contact with a fermionic bath beyond the Markov approximation. The approach is based on a second-order expansion of the Nakajima-Zwanzig master equation but systematically includes all quantum coherent memor...

[Phys. Rev. B 100, 134308] Published Wed Oct 16, 2019

]]>The ${M}_{x}{\text{Bi}}_{2}{\text{Se}}_{3}$ family are candidates for topological superconductors, where $M$ could be Cu, Sr, or Nb. Twofold anisotropy has been observed in various experiments, prompting the interpretation that the superconducting state is nematic. However, it has since been recognized in the literature that a twof...

[Phys. Rev. B 100, 134508] Published Wed Oct 16, 2019

]]>Iridate heterostructures are gaining interest as their magnetic properties are much more sensitive to structural distortion compared to pure spin systems due to spin-orbital entanglement. While bulk monolayer and bilayer iridates show $ab$-plane canted and $c$-axis antiferromagnetic (AFM) order, recent ...

[Phys. Rev. B 100, 140409(R)] Published Wed Oct 16, 2019

]]>Separating electron and phonon components in thermal conductivity is imperative for understanding thermal transport in metals and highly desirable in many applications. In this work, we predict the mode-dependent electron and phonon thermal conductivities of 18 different metals at room temperature f...

[Phys. Rev. B 100, 144306] Published Wed Oct 16, 2019

]]>Skyrmion crystals (SkXs) are a periodic alignment of magnetic skyrmions, i.e., a type of topologically protected spin textures. Compared with ordinary crystals, they can be drastically deformed under anisotropic effects because they are composed of field patterns whose deformation does not cause any...

[Phys. Rev. B 100, 144424] Published Wed Oct 16, 2019

]]>The helical electron states on the surface of topological insulators or elemental bismuth become unstable toward superconducting pairing formation when coupled to the charge or magnetic fluctuations. The latter gives rise to pairing instability in chiral channels ${d}_{xy}\pm i{d}_{{x}^{2}-{y}^{2}}$, as has been observed re...

[Phys. Rev. B 100, 144507] Published Wed Oct 16, 2019

]]>The antiferromagnetism in $\alpha -{\mathrm{Cu}}_{3}\mathrm{Mg}{\left(\mathrm{OH}\right)}_{6}{\mathrm{Br}}_{2}$ was studied by magnetic-susceptibility, specific-heat, and neutron-diffraction measurements. The crystal structure consists of ${\mathrm{Cu}}^{2+}$ kagome layers with ${\mathrm{Mg}}^{2+}$ ions occupying the centers of the hexagons, separated by ${\mathrm{Br}}^{1-}$ ions. The magnetic system orders antifer...

[Phys. Rev. B 100, 155129] Published Wed Oct 16, 2019

]]>An entropy cooling scheme based on electron or hole evaporation into full or empty narrow bands is used to prepare several interesting nonequilibrium states of the Hubbard model: (i) cold photo-doped Mott insulating states with long-lived quasiparticles, (ii) superconducting states in the repulsive model with an inverted population, and (iii) η-paired states in systems with a large density of doublons and holons.

[Phys. Rev. B 100, 155130] Published Wed Oct 16, 2019

]]>Combining first-principles calculations and experiment, we investigate the atomic and electronic structure of the Si/EuO interface. We consider the thermodynamic stability of interface structures with different levels of oxidation to identify the most probable configuration. By comparing the calcula...

[Phys. Rev. B 100, 155303] Published Wed Oct 16, 2019

]]>We study spin transport in bilayer graphene (BLG), spin-orbit coupled to a tungsten di sulfide (${\mathrm{WS}}_{\text{2}}$) substrate, and measure a record spin lifetime anisotropy $\sim 40\u201370$, i.e., the ratio between the out-of-plane ${\tau}_{\perp}$ and in-plane spin relaxation time ${\tau}_{\left|\right|}$. We control the injection and detection of in-plane ...

[Phys. Rev. B 100, 155415] Published Wed Oct 16, 2019

]]>Twisted van der Waals heterostructures and the corresponding superlattices, moiré superlattices, are remarkable material platforms, in which electron interactions and excited-state properties can be engineered. Particularly, the band offsets between adjacent layers can separate excited electrons and...

[Phys. Rev. B 100, 155416] Published Wed Oct 16, 2019

]]>The full spatial 3D profile of Majorana bound states (MBS) in a nanowirelike setup featuring a semiconducting carbon nanotube (CNT) as the central element is discussed. By atomic tight-binding calculations, we show that the chiral nature of the CNT lattice is imprinted in the MBS wave function which...

[Phys. Rev. B 100, 155417] Published Wed Oct 16, 2019

]]>In this work an alternate pathway is demonstrated to form ultrathin cobalt ferrite (${\mathrm{Co}}_{x}{\mathrm{Fe}}_{3-x}{\mathrm{O}}_{4}$) films by interdiffusion of ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$/CoO bilayers. Bilayer samples with different ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$/CoO thickness ratios have been prepared by reactive molecular beam epitaxy on Nb-doped ${\mathrm{SrTiO}}_{3}$(001) substrates to obtain ...

[Phys. Rev. B 100, 155418] Published Wed Oct 16, 2019

]]>Recent experiments with silicon qubits demonstrated strong coupling of a microwave resonator to the spin of a single electron in a double quantum dot, opening up the possibility of long-range spin-spin interactions. We present our theoretical calculation of effective interactions between distant qua...

[Phys. Rev. B 100, 161303(R)] Published Wed Oct 16, 2019

]]>We investigate the light-cone-like spread of electronic correlations in a laser-driven quantum chain. Using the time-dependent density matrix renormalization group, we show that high-frequency driving leads to a Floquet-engineered spread velocity that determines the enhancement of density-density co...

[Phys. Rev. B 100, 165125] Published Wed Oct 16, 2019

]]>By using density functional theory calculations with an on-site Coulomb repulsion term combined with Boltzmann transport theory, we explore the effect of ${t}_{2g}$ orbital occupation on the electronic, magnetic, and thermoelectric properties of ${\left(\mathrm{Sr}X{\mathrm{O}}_{3}\right)}_{1}/{\left({\mathrm{SrTiO}}_{3}\right)}_{n}\left(001\right)$ superlattices with $n=1,3$ and $X=\mathrm{V}$, Cr,...

[Phys. Rev. B 100, 165126] Published Wed Oct 16, 2019

]]>We use the inchworm quantum Monte Carlo method to investigate the full counting statistics of particle and energy currents in a strongly correlated quantum dot. Our method is used to extract the heat fluctuations and entropy production of a quantum thermoelectric device, as well as cumulants of the ...

[Phys. Rev. B 100, 165127] Published Wed Oct 16, 2019

]]>The dual boson approach to strongly correlated systems generally involves a dynamic (frequency-dependent) interaction in the auxiliary impurity model. In this work, we explore the consequences of forcing this interaction to be instantaneous (frequency independent) via the use of a self-consistency c...

[Phys. Rev. B 100, 165128] Published Wed Oct 16, 2019

]]>The properties of the Hofstadter butterfly, a fractal, self-similar spectrum of a two-dimensional electron gas, are studied in the case where the system is additionally illuminated with monochromatic light. This is accomplished by applying Floquet theory to a tight-binding model on the honeycomb lat...

[Phys. Rev. B 100, 165411] Published Wed Oct 16, 2019

]]>Atomically thin two-dimensional heterostructures are a promising, novel class of materials with ground-breaking properties. The possibility of choosing many constituent components and their proportions allows optimization of these materials to specific requirements. The wide adaptability comes with ...

[Phys. Rev. B 100, 165412] Published Wed Oct 16, 2019

]]>Heusler-type ${\mathrm{Co}}_{x}{\mathrm{Cr}}_{78-x}{\mathrm{Ga}}_{11}{\mathrm{Si}}_{11}$ alloys exhibit the reentrant martensitic transition, i.e., the forward martensitic transition from the paramagnetic austenite (Para-A) phase into the paramagnetic martensite (Para-M) phase and the successive reverse martensitic transition from the Para-M phase into the...

[Phys. Rev. B 100, 134205] Published Tue Oct 15, 2019

]]>Near-field radiative heat transfer exhibits various effects, such as amplification due to the geometry of the system. In this work, we construct a periodic layered structure which consists of multiple layers of alternating materials. Radiative heat transfer (RHT) between nanoparticles placed on each...

[Phys. Rev. B 100, 134305] Published Tue Oct 15, 2019

]]>Quantum information tends to spread out in interacting systems, leading to thermalization as characterized by the volume-law entropy of entanglement, while local measurements that extract classical information of the state tend to interrupt the propagation of information and reduce the entanglement entropy. Can entanglement sustain repeated measurements? The authors address this question in a toy hybrid-circuit model, where qubits undergo both unitary time evolution and sporadic local measurements. The phase diagram features a stable volume-law phase of entanglement for weak measurements and an area-law phase for strong measurements. The two domains in the diagram are separated by a single second-order phase transition. Characterization of both phases as well as of the critical point are presented.

[Phys. Rev. B 100, 134306] Published Tue Oct 15, 2019

]]>We investigate dynamical evolution of a topological memory that consists of two $p$-wave superconducting wires separated by a nontopological junction, focusing on the primary errors (i.e., qubit loss) and secondary errors (bit and phase flip) that arise due to nonadiabaticity. On the question of qubit...

[Phys. Rev. B 100, 134307] Published Tue Oct 15, 2019

]]>Motivated by the recent development of terahertz pump-probe experiments, we investigate the short-time dynamics in superconductors with multiple attractive pairing channels. Studying a single-band square lattice model with a spin-spin interaction as an example, we find the signatures of collective e...

[Phys. Rev. B 100, 140501(R)] Published Tue Oct 15, 2019

]]>We discuss a two-dimensional system under the perturbation of a moiré potential, which takes the same geometry and lattice constant as the underlying lattices but mismatches up to relative rotation. Such a self-dual model belongs to the orthogonal class of a quasiperiodic system whose features have ...

[Phys. Rev. B 100, 144202] Published Tue Oct 15, 2019

]]>During the past few years high-order harmonic generation (HHG) has opened up the field of ultrafast spectroscopy to an ever larger community by providing a table-top and affordable femtosecond extreme ultraviolet (EUV) and soft-x-ray source. In particular, the field of femtomagnetism has largely ben...

[Phys. Rev. B 100, 144421] Published Tue Oct 15, 2019

]]>Iridate oxides on a honeycomb lattice are considered promising candidates for realization of quantum spin liquid states. We investigate the magnetic couplings in a structural model for a honeycomb iridate ${\mathrm{K}}_{2}{\mathrm{IrO}}_{3}$, with ${C}_{3}$ point-group symmetry at the Ir sites, which is an end member of the recently sy...

[Phys. Rev. B 100, 144422] Published Tue Oct 15, 2019

]]>We study spin transport in the one-dimensional anisotropic $S=1$ Heisenberg model. Particular emphasis is given to dynamics at infinite temperature, where current autocorrelations and spatiotemporal correlation functions are obtained by means of an efficient pure-state approach based on the concept of...

[Phys. Rev. B 100, 144423] Published Tue Oct 15, 2019

]]>$1T\text{\u2212}\mathrm{Ta}{\mathrm{S}}_{2}$ shows various electronic phases including complex charge density waves (CDWs), Mott insulator, superconductor, and spin liquid. In addition to such thermodynamically stable states, thermally inaccessible metastable metallic states can be induced by means of current. We investigated the nonli...

[Phys. Rev. B 100, 155125] Published Tue Oct 15, 2019

]]>Signatures of the Kondo effect in the electrical conductance of strongly correlated quantum dots are well understood both experimentally and theoretically, while those in the thermopower have been the subject of recent interest, both theoretically and experimentally. Here, we extend theoretical work...

[Phys. Rev. B 100, 155126] Published Tue Oct 15, 2019

]]>We apply high-resolution scanning tunneling microscopy to study intrinsic defect states of bulk FeSe. Four types of intrinsic defects, including the type-I dumbbell, type-II dumbbell, top-layer Se vacancy, and inner-layer Se-site defect, are extensively analyzed by scanning tunneling spectroscopy. T...

[Phys. Rev. B 100, 155127] Published Tue Oct 15, 2019

]]>We study chaos in a classical limit of the Sachdev-Ye-Kitaev (SYK) model obtained in a suitably defined large-$S$ limit. The low-temperature Lyapunov exponent is found to depend linearly on temperature, with a slope that is parametrically different than in the quantum case: It is proportional to $N/S$. ...

[Phys. Rev. B 100, 155128] Published Tue Oct 15, 2019

]]>The Purcell effect has been the basis for several decades in understanding enhancement of photonic efficiency and decay rates of emitters through their coupling to cavity modes and metal nanostructures. However, it is not clear whether this regime of radiative enhancements can be extended to ultrasm...

[Phys. Rev. B 100, 155413] Published Tue Oct 15, 2019

]]>We theoretically investigate gate-defined graphene superlattices with broken inversion symmetry as a platform for realizing tunable valley-dependent transport. Our analysis is motivated by recent experiments [C. Forsythe *et al.*, Nat. Nanotechnol. **13**, 566 (2018)] wherein gate-tunable superlattice po...

[Phys. Rev. B 100, 155414] Published Tue Oct 15, 2019

]]>Recent experiments have measured the signatures of the Kondo effect in the zero-field thermopower of strongly correlated quantum dots [Svilans *et al.*, Phys. Rev. Lett. **121**, 206801 (2018); Dutta *et al.*, Nano Lett. **19**, 506 (2019)]. They confirm the predicted Kondo-induced sign change in the thermopo...

[Phys. Rev. B 100, 161106(R)] Published Tue Oct 15, 2019

]]>Recently considerable excitement has arisen due to the experimental observation of a field-induced spin liquid phase in the compound $\alpha \text{\u2212}{\mathrm{RuCl}}_{3}$. However, the nature of this putative spin liquid phase and the relevant microscopic model Hamiltonian remain still unclear. In this work, we address these que...

[Phys. Rev. B 100, 165123] Published Tue Oct 15, 2019

]]>An interplay between electron correlation and reduced dimensionality due to the Landau quantization gives rise to exotic electronic phases in three-dimensional semimetals under high magnetic field. Using an unbiased theoretical method, we clarify for the first time comprehensive ground-state phase d...

[Phys. Rev. B 100, 165124] Published Tue Oct 15, 2019

]]>We propose a scheme for the spatial exciton energy control and exciton routing in a transition-metal dichalcogenide (TMD) monolayer which lies on a quantum paraelectric substrate. It relies on the ultrasensitive response of the substrate dielectric permittivity to temperature changes, allowing for s...

[Phys. Rev. B 100, 165303] Published Tue Oct 15, 2019

]]>[Phys. Rev. B 100, 169903] Published Tue Oct 15, 2019

]]>[Phys. Rev. B 100, 169904] Published Tue Oct 15, 2019

]]>We consider the prospects of locating and characterizing individual defect centers in bulk materials using electron energy loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). We simulate STEM-EELS maps for two important defect centers in diamond, namely, the negatively ch...

[Phys. Rev. B 100, 134103] Published Mon Oct 14, 2019

]]>Quantum many-body physics simulations with matrix product states can often be accelerated if the quantum symmetries present in the system are explicitly taken into account. Conventionally, quantum symmetries have to be determined beforehand when constructing the tensors for the matrix product state ...

[Phys. Rev. B 100, 134304] Published Mon Oct 14, 2019

]]>Magnetic rare-earth/nonmagnetic metal superlattices are well-known to display chiral spin helices in the rare-earth layers that propagate coherently across the nonmagnetic layers. However, the underlying mechanism that preserves the magnetic phase and chirality coherence across the nonmagnetic layer...

[Phys. Rev. B 100, 134417] Published Mon Oct 14, 2019

]]>In this work, the electric modulation of magnetic anisotropy is investigated on a granule/matrix interface of a Py/PZT composite. Outside the Py/PZT interface, the electric polarization is derived through the Thomas-Fermi model and mean field approximation. Inside the Py/PZT interface, the magnetizi...

[Phys. Rev. B 100, 134418] Published Mon Oct 14, 2019

]]>Polarization-resolved Raman spectroscopy was performed and analyzed from large, high-quality, monodomain single crystal of $\alpha \text{\u2212}{\mathrm{RuCl}}_{3}$, a proximate Kitaev quantum spin liquid. Spectra were collected with laser polarizations parallel and perpendicular to the honeycomb plane. Pairs of nearly degenerate ph...

[Phys. Rev. B 100, 134419] Published Mon Oct 14, 2019

]]>${\mathrm{Co}}_{2}{\mathrm{V}}_{2}{\mathrm{O}}_{7}$ was recently reported to exhibit remarkable magnetic-field-induced magnetization plateaus and ferroelectricity [R. Chen *et al.*, Phys. Rev. B **98**, 184404 (2018)], but its magnetic ground state remains ambiguous. Magnetometry measurements and time-of-flight neutron powder diffraction (NPD) hav...

[Phys. Rev. B 100, 134420] Published Mon Oct 14, 2019

]]>The Abelian Higgs model is the textbook example for the superconducting transition and the Anderson-Higgs mechanism, and has become pivotal in the description of deconfined quantum criticality. We study the Abelian Higgs model with $n$ complex scalar fields at unprecedented four-loop order in the $4-\epsilon $ ...

[Phys. Rev. B 100, 134507] Published Mon Oct 14, 2019

]]>Motivated by the interest in topological quantum paramagnets in candidate spin-1 magnets, we investigate the diamond-lattice compound ${\mathrm{NiRh}}_{2}{\mathrm{O}}_{4}$ using *ab initio* theory and model Hamiltonian approaches. Our density functional study, taking into account the unquenched orbital degrees of freedom, shows st...

[Phys. Rev. B 100, 140408(R)] Published Mon Oct 14, 2019

]]>The sensitive dependence of monolayer materials on their environment often gives rise to unexpected properties. It was recently demonstrated that monolayer FeSe on a ${\mathrm{SrTiO}}_{3}$ substrate exhibits a much higher superconducting critical temperature ${T}_{c}$ than the bulk material. Here, we examine the interfaci...

[Phys. Rev. B 100, 144103] Published Mon Oct 14, 2019

]]>We study the stability of Li-O compounds as a function of pressure, with rich phase diagram, diverse properties, and fundamental chemical interest in mind. Using the *ab initio* evolutionary algorithm USPEX, we predict the stability of compounds ${\mathrm{LiO}}_{4},{\mathrm{Li}}_{5}{\mathrm{O}}_{3}$, and ${\mathrm{Li}}_{6}\mathrm{O}$ under pressure. Unexpectedly, ${\mathrm{LiO}}_{2}$...

[Phys. Rev. B 100, 144104] Published Mon Oct 14, 2019

]]>We fabricate a large number $(>100)$ of nonlocal spin valves with mesoscopic Cu channels. A systematic method is used to extract Cu resistivity ${\rho}_{\mathrm{Cu}}$ and spin relaxation length ${\lambda}_{\mathrm{Cu}}$ from each given structure. A relationship between ${\lambda}_{\mathrm{Cu}}$ and ${\rho}_{\mathrm{Cu}}$ is established over a broad range of ${\rho}_{\mathrm{Cu}}$ (from 0.7 to $>\mathrm{...}$

[Phys. Rev. B 100, 144419] Published Mon Oct 14, 2019

]]>The magnetic ground state of the ideal quantum kagome antiferromagnet (QKA) has been a long-standing puzzle, mainly because perturbations to the nearest-neighbor isotropic Heisenberg Hamiltonian can lead to various fundamentally different ground states. Here we investigate a recently synthesized QKA...

[Phys. Rev. B 100, 144420] Published Mon Oct 14, 2019

]]>Anisotropy is the key to understanding iron-based superconductors, which usually have quasi-two-dimensional layered structures. By using torque measurements (a sensitive tool to detect the magnetic anisotropy), we investigate the superconducting anisotropy of the ${\mathrm{KCa}}_{2}{\mathrm{Fe}}_{4}{\mathrm{As}}_{4}{\mathrm{F}}_{2}$ (12442, ${T}_{c}=33\phantom{\rule{4.pt}{0ex}}\text{K}$) single ...

[Phys. Rev. B 100, 144505] Published Mon Oct 14, 2019

]]>We show that an array of qubits embedded in a waveguide can emit entangled pairs of microwave photon beams. The quadratures obtained from the homodyne detection of these outputs beams form a pair of correlated continuous variables similar to the Einstein-Podolsky-Rosen experiment. The photon pairs a...

[Phys. Rev. B 100, 144506] Published Mon Oct 14, 2019

]]>In one dimension (1D), a general decaying long-range interaction can be fit to a sum of exponential interactions ${e}^{-\lambda {r}_{ij}}$ with varying exponents $\lambda $, each of which can be represented by a simple matrix product operator with bond dimension $D=3$. Using this technique, efficient and accurate simulations of ...

[Phys. Rev. B 100, 155121] Published Mon Oct 14, 2019

]]>We consider a lattice version of the Bisognano-Wichmann (BW) modular Hamiltonian as an ansatz for the bipartite entanglement Hamiltonian of the quantum critical chains. Using numerically unbiased methods, we check the accuracy of the BW ansatz by both comparing the BW Rényi entropy to the exact resu...

[Phys. Rev. B 100, 155122] Published Mon Oct 14, 2019

]]>Real-time evolution and charge pumping in magnetic Weyl semimetals are studied by solving the time-dependent Schrödinger equations. In the adiabatic limit of the real-time evolution, we show that the total pumped charge is quantized in the magnetic Weyl semimetals as in the quantum Hall system, alth...

[Phys. Rev. B 100, 155123] Published Mon Oct 14, 2019

]]>Magnetoelectric spectroscopy is a powerful tool to determine all off-diagonal elements of the magnetoelectric tensor in a contactless fashion. Here, the authors demonstrate the efficiency of this optical method by measuring the off-diagonal magnetoelectric response of LiCoPO${}_{4}$ in the GHz-THz regime. They find that the magnetoelectric effect in this antiferromagnet is dominated by the symmetric (quadrupolar) part of the magnetoelectric tensor.

[Phys. Rev. B 100, 155124] Published Mon Oct 14, 2019

]]>We develop a many-body approach to the behavior of exciton bound states and the conduction electron band edge in a surrounding electron-hole plasma with a focus on the absorption spectrum of Rydberg excitons in cuprous oxide. The interplay of band edge and exciton levels is analyzed numerically, whe...

[Phys. Rev. B 100, 155204] Published Mon Oct 14, 2019

]]>The recently found $(\mathrm{Tl},\mathrm{Au})/\mathrm{Si}\left(100\right)c(2\times 2)$ two-dimensional compound which possesses spin-split surface states with peculiar spin texture and strong band anisotropy was examined using low-temperature scanning tunneling microscopy and scanning tunneling spectroscopy observations and *in situ* four-probe t...

[Phys. Rev. B 100, 155412] Published Mon Oct 14, 2019

]]>Thermoelectricity is a promising avenue for harvesting energy but large-scale applications are still hampered by the lack of highly efficient low-cost materials. Recently, ${\mathrm{Fe}}_{2}YZ$ Heusler compounds were predicted theoretically to be interesting candidates with large thermoelectric power factor. Here, ...

[Phys. Rev. B 100, 161201(R)] Published Mon Oct 14, 2019

]]>Polycrystalline graphene has an inherent tendency to buckle, i.e., develop out-of-plane, three-dimensional structure. A force applied to stretch a piece of polycrystalline graphene influences the out-of-plane structure. Even if the graphene is well relaxed, this happens in nonlinear fashion: Occasio...

[Phys. Rev. B 100, 161402(R)] Published Mon Oct 14, 2019

]]>Using a realistic multiband model for two holes doped into a ${\mathrm{CuO}}_{2}$ layer, we devise a method to turn off the magnon-mediated interaction between the holes. This allows us to verify that this interaction is attractive, and therefore could indeed be (part of) the superconducting glue. We derive its ana...

[Phys. Rev. B 100, 165118] Published Mon Oct 14, 2019

]]>$\mathrm{L}{\mathrm{i}}_{2}\mathrm{Ru}{\mathrm{O}}_{3}$ undergoes a structural transition at a relatively high temperature of 550 K with a distinct dimerization of Ru-Ru bonds on the otherwise isotropic honeycomb lattice. It exhibits a unique herringbone dimerization pattern with an unusually large value of bond shrinkage, about $\sim 0.5\phantom{\rule{0.16em}{0ex}}\AA $. However, m...

[Phys. Rev. B 100, 165119] Published Mon Oct 14, 2019

]]>Resonant photoelectron spectroscopy at the Co and Mn $2p$ core absorption edges of half-metallic ${\mathrm{Co}}_{2}\mathrm{MnGe}$ has been performed to determine the element-specific density of states (DOS). A significant contribution of the Mn $3d$ partial DOS near the Fermi level $\left({E}_{\mathrm{F}}\right)$ was clarified by measurement at the Mn $2p$...

[Phys. Rev. B 100, 165120] Published Mon Oct 14, 2019

]]>We compute the real-space profile of the superconducting order parameter (OP) in a hybrid ring that consists of a one-dimensional superconductor connected to a Fibonacci chain using a self-consistent approach. In our paper, the strength of the penetration as measured by the order parameter at the ce...

[Phys. Rev. B 100, 165121] Published Mon Oct 14, 2019

]]>We study theoretically the magnetoresistance oscillations near a half-filled lowest Landau level ($\nu =1/2$) that result from the presence of a periodic one-dimensional electrostatic potential. We use the Dirac composite fermion theory of Son [Phys. Rev. X **5**, 031027 (2015)], where the $\nu =1/2$ state is des...

[Phys. Rev. B 100, 165122] Published Mon Oct 14, 2019

]]>[Phys. Rev. B 100, 169902] Published Mon Oct 14, 2019

]]>We study a problem of interacting fractional charges with the ${J}_{1}\text{\u2212}{J}_{2}\text{\u2212}{J}_{3}$ Ising model on a checkerboard lattice under magnetic field. As a result of the interplay between repulsive interactions and particle density tuning by a magnetic field, the fractional charges form a classical spin liquid (CSL) ph...

[Phys. Rev. B 100, 134415] Published Fri Oct 11, 2019

]]>The interplay of the magnetic field and interlayer correlations was experimentally investigated in a quasi-two-dimensional quantum magnet $\mathrm{Cu}\left(en\right){\mathrm{Cl}}_{2}$. For this purpose, extensive quantum Monte Carlo (QMC) studies of the finite-temperature properties of the spin-1/2 Heisenberg antiferromagnet (HAF) on ...

[Phys. Rev. B 100, 134416] Published Fri Oct 11, 2019

]]>The unconventional superconductivity in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ continues to defy a unified interpretation. In this paper, we focus on some novel aspects of its superconducting pairing by exploiting the orbital degree of freedom in this material. The multiorbital nature, combined with the symmetry of the orbitals i...

[Phys. Rev. B 100, 134506] Published Fri Oct 11, 2019

]]>We present a symmetric double-sided pillared phononic crystal (PPnC) where either quantum spin Hall effect (QSHE) or quantum valley Hall effect (QVHE) is emulated by solely imposing different perturbations to the geometry. When occurring at the deep subwavelength scale, the valley-polarized edge sta...

[Phys. Rev. B 100, 140101(R)] Published Fri Oct 11, 2019

]]>Anderson localization is fundamentally relevant to all physical systems where coherent waves evolve in the presence of disorder. Physically, any disorder must have a finite spectral bandwidth, hence the disorder is always correlated. Here, we study the regime of localization mediated by virtual tran...

[Phys. Rev. B 100, 140202(R)] Published Fri Oct 11, 2019

]]>Using spin-dependent specular and off-specular polarized neutron reflectivity (PNR), we report the observation of a twisted helical magnetic structure with planar 2π domain walls (DWs) and highly correlated magnetic domains in a Gd/Co multilayer. Specular PNR with a polarization analysis reveals the...

[Phys. Rev. B 100, 140405(R)] Published Fri Oct 11, 2019

]]>Laser pulse induced terahertz (THz) emission from Ta/${\left({\mathrm{Co}}_{x}{\mathrm{Fe}}_{1-x}\right)}_{80}{\mathrm{B}}_{20}$/MgO thin films, with varying compositions $x$ and annealing temperatures, is investigated. With increasing annealing temperature, the THz emission intensity exhibits significant dependence on $x$, with maxima at $x$ of 0.1–0.3. The $x$ dep...

[Phys. Rev. B 100, 140406(R)] Published Fri Oct 11, 2019

]]>Here, we predict the effect of the spontaneous deformation of a flexible ferromagnetic ribbon induced by Dzyaloshinskii-Moriya interaction (DMI). The geometrical form of the deformation is determined both by the type of DMI and by the equilibrium magnetization of the stripe. We found three different...

[Phys. Rev. B 100, 140407(R)] Published Fri Oct 11, 2019

]]>The high-temperature structural phase transition of the potential topological material ${\mathrm{NbNiTe}}_{2}$ has been studied in detail. At high temperatures, the structure is centrosymmetric with orthorhombic space-group $P\frac{2}{m}\frac{2}{n}\frac{{2}_{1}}{a}\left(Pmna\right)$, and distorts at 373 K to a monoclinic structure with space-group $P11\frac{{2}_{1}}{a}(P{112}_{\mathrm{...}}$

[Phys. Rev. B 100, 144102] Published Fri Oct 11, 2019

]]>Spin pumping into proximity-polarized Pt was investigated by magnetic damping studies of Permalloy(Py)/Pt and Py/Pt/Py structures for a Pt thickness range of $0<{d}_{\mathrm{Pt}}<3$ nm. The observed exponential increase in damping with increasing ${d}_{\mathrm{Pt}}$ in Py/Pt is consistent with previous studies of single crys...

[Phys. Rev. B 100, 144418] Published Fri Oct 11, 2019

]]>Coupled quantum wells have been proposed as candidates for highly polarizable structures due to their near-degenerate and dipole-coupled electronic states. Hence, many interesting applications in linear and nonlinear optics can be envisioned. We analyze this proposal considering a simple structure w...

[Phys. Rev. B 100, 155410] Published Fri Oct 11, 2019

]]>Recently, we have proposed an unusual mechanism of superconducting current that is specific for quantum Hall edge channels connected to superconducting electrodes. We have shown that the supercurrent can be mediated by a nonlocal electron-electron interaction that provides an opportunity for a long-...

[Phys. Rev. B 100, 155411] Published Fri Oct 11, 2019

]]>Weak topological insulators and Dirac semimetals are gapped and nodal phases with distinct topological properties, respectively. Here, we propose a topological phase that exhibits features of both and is dubbed composite Dirac semimetal (CDSM). In its bulk, the CDSM has a pair of Dirac points and a ...

[Phys. Rev. B 100, 161401(R)] Published Fri Oct 11, 2019

]]>We study the Anderson orthogonality catastrophe, and the corresponding x-ray edge problem, in systems that are at a localization transition driven by a deterministic quasiperiodic potential. Specifically, we address how the ground state of the Aubry-André model, at its critical point, responds to an...

[Phys. Rev. B 100, 165116] Published Fri Oct 11, 2019

]]>Axion insulator is a new state of quantum matter with a vanishing Chern number but a quantized topological axion response. We study the critical properties of the magnetic-field-induced quantum phase transition in axion insulators. Take the even septuple layer film ${\mathrm{MnBi}}_{2}{\mathrm{Te}}_{4}$ as a concrete example, We...

[Phys. Rev. B 100, 165117] Published Fri Oct 11, 2019

]]>A Weyl semimetal is a three-dimensional topological gapless phase. In the presence of strong enough disorder it undergoes a quantum transition towards a diffusive metal phase whose universality class depends on the range of disorder correlations. Similar to other quantum transitions driven by disord...

[Phys. Rev. B 100, 134204] Published Thu Oct 10, 2019

]]>Recent demonstrations of electrical detection and manipulation of antiferromagnets (AFMs) have opened new opportunities toward robust and ultrafast spintronics devices. However, it is difficult to establish the connection between the spin-transport behavior and the microscopic AFM domain states in t...

[Phys. Rev. B 100, 134413] Published Thu Oct 10, 2019

]]>We investigate the phase diagram of an elastic interaction model for spin crossover (SC) materials on a triangular lattice, in which the long-range (LR) interaction of elastic origin, antiferromagnetic-like nearest-neighbor (NN) interaction ${J}_{1}$, and ferromagnetic (F)-like next-NN interaction ${J}_{2}$ inter...

[Phys. Rev. B 100, 134414] Published Thu Oct 10, 2019

]]>The microscopic mechanism of the interaction of exchange-coupled Fe and V spins in a $\text{Fe}{\text{V}}_{2}{\text{O}}_{4}$ ferrimagnet with the electric field has been described. The derived effective energy operator makes it possible to calculate the electric polarization vector using the information about the magnetic structure...

[Phys. Rev. B 100, 140404(R)] Published Thu Oct 10, 2019

]]>Complex systems with coexisting polarity, chirality, and incommensurate magnetism are of great interest because they open new degrees of freedom in the interaction between crystal and magnetic subsystems and therefore they host a plethora of intriguing physical properties. Here we report the optical...

[Phys. Rev. B 100, 144417] Published Thu Oct 10, 2019

]]>The extent of electron correlations in FeSi and Fe-3$d$/Si-3$p$ hybridization embeds a narrow gap in the resultant quasiparticle peak at the Fermi level. Here, the authors investigate the effect of compression tuning of this electronic fine structure and demonstrate its sensitivity to lattice heterogeneities, e.g., those resulting from extrinsic lattice strains. Pressurization tunes the mobility edge relative to the Fermi level until an unusual metallic state ensues beyond about 15 GPa, which does not involve any structural instability of the original $B$20-type cubic structure.

[Phys. Rev. B 100, 155118] Published Thu Oct 10, 2019

]]>The study of quantum frustrated systems remains one of the most challenging subjects of quantum magnetism, as they can hold quantum spin liquids, whose characterization is quite elusive. The presence of gapped quantum spin liquids possessing long-range entanglement while being locally indistinguisha...

[Phys. Rev. B 100, 155119] Published Thu Oct 10, 2019

]]>Recently observed magnetophonon resonances in the magnetoresistance of graphene are investigated using the Kubo formalism. This analysis provides a quantitative fit to the magnetophonon resonances over a wide range of carrier densities. It demonstrates the predominance of carrier scattering by low-e...

[Phys. Rev. B 100, 155120] Published Thu Oct 10, 2019

]]>Accurate modeling of electronic properties of nanostructures is a challenging theoretical problem. Methods making use of continuous media approximation, such as $\mathit{k}\xb7\mathit{p}$, sometimes struggle to reproduce results obtained with more accurate atomistic approaches. On the contrary, atomistic schemes generally...

[Phys. Rev. B 100, 155409] Published Thu Oct 10, 2019

]]>Luttinger semimetals are three-dimensional electron systems with a parabolic band touching and an effective total spin $J=3/2$. In this paper, we present an analytical theory of dielectric screening of inversion-symmetric Luttinger semimetals with an arbitrary carrier density and conduction-valence ef...

[Phys. Rev. B 100, 165115] Published Thu Oct 10, 2019

]]>We study charge transport through $N$-lead junctions ($N\ge 3$) of spinless Luttinger-liquid wires with bias voltages applied to Fermi-liquid reservoirs. In particular, we consider a Y junction, which is a setup characteristic of the tunneling experiment. In this setup, the strength of electron-electron in...

[Phys. Rev. B 100, 165410] Published Thu Oct 10, 2019

]]>We formulate a classical theory $({\omega}_{c}\tau \lesssim 1$ with ${\omega}_{c}$ as the cyclotron frequency and $\tau $ as the relaxation time) to study the influence of perpendicular magnetic field on the electron-impurity scattering process in two-dimensional electron gas. To describe the curved incoming and outgoing trajectories, we in...

[Phys. Rev. B 100, 134202] Published Wed Oct 09, 2019

]]>Universal features in patterns of entanglement of quantum states provide valuable information-theoretical insights into complex quantum many-body phases and dynamics. This work uncovers a novel class of phase transition between weakly- and strongly- entangled quantum states, described holographically at the boundary of a random tensor network. The univeral scaling structure of these transitions is explored via an exact mapping onto a classical spin model, which also opens the door to efficient numerical methods to study these complex quantum phenomena.

[Phys. Rev. B 100, 134203] Published Wed Oct 09, 2019

]]>Magnetic systems with frustration often have large classical degeneracy. We show that their low-energy physics can be understood as dynamics within the space of classical ground states. We demonstrate this mapping in a family of quantum spin clusters where every pair of spins is connected by an $XY$ a...

[Phys. Rev. B 100, 134411] Published Wed Oct 09, 2019

]]>We consider the reduced density matrix for a disk in the ground state of the interacting fixed points of the large-$N\phantom{\rule{4pt}{0ex}}O\left(N\right)$ vector model in $2+1$ dimensions. Using the map to the free energy on ${\mathbb{H}}_{2}\times {S}^{1}$, we show that there is an instability in the Rényi entropies at $n=1$ in the $N\to \infty $ limit, indicating a phase ...

[Phys. Rev. B 100, 134412] Published Wed Oct 09, 2019

]]>A composite high-pressure phase diagram for silicon has been predicted for up to 4 TPa. This diagram has been built using a combination of evolutionary algorithm-based structure searches, electronic density functional theory, lattice dynamics of perfect crystals, and anharmonic corrections for the s...

[Phys. Rev. B 100, 144101] Published Wed Oct 09, 2019

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