We investigate the critical behavior of the open coherently-driven Bose-Hubbard dimer under nonlocal dissipation. A conserved quantity arises from the nonlocal nature of the dissipation, rendering the dimer multistable. In the weak-coupling semiclassical limit, the displayed criticality takes the fo...

[Phys. Rev. B 100, 054303] Published Fri Aug 16, 2019

]]>We show that interactions can drive a class of higher order topological superconductors (HOTSCs) into symmetry-enriched topologically ordered phases exemplified by topological quantum error correcting codes. In two dimensions, interacting HOTSCs realize various topologically ordered surface and colo...

[Phys. Rev. B 100, 054513] Published Fri Aug 16, 2019

]]>Ternary alloys Co-Zn-Mn with $\beta $-Mn-type structure exhibit helimagnetic order and skyrmion lattice states in a low-Mn-concentration region. Recent studies on ${\mathrm{Co}}_{10-\frac{x}{2}}{\mathrm{Zn}}_{10-\frac{x}{2}}{\mathrm{Mn}}_{x}$ (CZM) revealed that the magnetic modulation period and the paramagnetic-to-helimagnetic transition temperature are reduced wit...

[Phys. Rev. B 100, 064407] Published Fri Aug 16, 2019

]]>In electronic systems, the superconducting instability develops as a result of nontrivial renormalization of the overall repulsive, yet essentially frequency-dependent interaction. Starting with simple models that admit of explicit analytical treatment, the authors develop a generic method of implicit renormalization that makes possible the solution of the challenging problem of extracting the transition temperature and of the effective pairing interaction from first-principles data in the normal state.

[Phys. Rev. B 100, 064513] Published Fri Aug 16, 2019

]]>Density functional theory maps an interacting Hamiltonian onto the Kohn-Sham Hamiltonian, an explicitly free model with identical local fermion densities. Using the interaction distance, the minimum distance between the ground state of the interacting system and a generic free-fermion state, we quan...

[Phys. Rev. B 100, 075133] Published Fri Aug 16, 2019

]]>The exact muffin tin orbital (EMTO) method features high efficiency and accuracy for first-principles simulations with density functional theory. In this paper we report our implementation of the EMTO method for electronic-structure and quantum transport simulation of device materials. We consider a...

[Phys. Rev. B 100, 075134] Published Fri Aug 16, 2019

]]>Excitons are bound electron-hole pairs that dominate the optical response of semiconductors and insulators, especially in materials where the Coulomb interaction is weakly screened. Light absorption (including excitonic effects) has been studied extensively using first-principles calculations, but m...

[Phys. Rev. B 100, 075135] Published Fri Aug 16, 2019

]]>Coupling between charge and spin, and magnetoelectric effects more generally, have been an area of great interest for several years, with the sought-after ability to control magnetic degrees of freedom via charge currents serving as an impetus. The orbital Edelstein effect (OEE) is a kinetic magneto...

[Phys. Rev. B 100, 075136] Published Fri Aug 16, 2019

]]>We show that topological phases of the Dirac system in arbitral even dimensional space are simulated by $LC$ electric circuits with operational amplifiers. The lattice Hamiltonian for the hypercubic lattice in $2n$-dimensional space is characterized by the $n\mathrm{th}$ Chern number. The boundary state is describ...

[Phys. Rev. B 100, 075423] Published Fri Aug 16, 2019

]]>Materials exhibiting multiple stable phases can be used as functional components in electronic and optical applications if the phase transition is controllable. Group-VI transition metal dichalcogenides (TMDs, ${\mathrm{MX}}_{2}$, where M = Mo, W and X = S, Se) are known to undergo charge induced transitions from s...

[Phys. Rev. B 100, 075424] Published Fri Aug 16, 2019

]]>We establish the presence of foliated fracton order in the Majorana checkerboard model. In particular, we describe an entanglement renormalization group transformation which utilizes toric code layers as resources of entanglement and furthermore discuss entanglement signatures and fractional excitat...

[Phys. Rev. B 100, 085127] Published Fri Aug 16, 2019

]]>Proximity effects in two-dimensional heterostructures allow to transform nonmagnetic materials into synthetic magnets that do not involve magnetic ions. Based on density functional theory calculations, the present study predicts a sizeable proximity exchange interactions, induced by ferromagnetic CrI${}_{3}$, in transition metal dichalcogenides. Remarkably, the exchange coupling depends qualitatively on the twist angle, while being also tunable by an electric field. The authors establish the short-range character of the proximity effect and make specific predictions for the excitonic level splittings, due to the induced exchange coupling.

[Phys. Rev. B 100, 085128] Published Fri Aug 16, 2019

]]>In this paper, we present systematic improvements to a method that allows us to determine the surface phase diagrams based on *ab initio* calculations and atomistic thermodynamics. In particular, we include a contribution derived from thermal vibrations of the surface, which is usually omitted in such...

[Phys. Rev. B 100, 085304] Published Fri Aug 16, 2019

]]>In the conventional paradigm of the spin Hall effect, the side-jump conductivity due to electron-phonon scattering is regarded to be temperature independent. In contrast, we draw the distinction that, while this side-jump conductivity is temperature independent in the classical equipartition regime ...

[Phys. Rev. B 100, 085425] Published Fri Aug 16, 2019

]]>Metasurfaces, the two-dimensional (2D) counterpart of metamaterials, have recently attracted a great deal of attention due to their amazing properties, including negative refraction, hyperbolic dispersion, and manipulation of the evanescent spectrum. In this work, a theory model is proposed for the ...

[Phys. Rev. B 100, 085426] Published Fri Aug 16, 2019

]]>We identify and investigate two classes of non-Hermitian systems, i.e., one resulting from a Lorentz-symmetry violation (LSV) and the other from a complex mass (CM) with Lorentz invariance. The mechanisms to break, and approaches to restore, the bulk-boundary correspondence in these two types of non...

[Phys. Rev. B 100, 054105] Published Thu Aug 15, 2019

]]>The melting curve of elemental sulfur was measured to pressures of 65 GPa in a laser-heated diamond-anvil cell using *ex situ* textural analyses combined with spectroradiometry and benchmarked with laser-power-temperature functions. The melting curve reaches temperatures of $\sim 1800\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ by 65 GPa and is smo...

[Phys. Rev. B 100, 054106] Published Thu Aug 15, 2019

]]>The tetragonal-to-orthorhombic phase transition at ${T}_{s}$, which precedes the antiferromagnetic phase transition at ${T}_{N}$ in many iron-based superconductors, is considered one of the manifestations of electronic *nematic* order. By constructing temperature-pressure phase diagrams of pure and Co-doped ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{\mathrm{...}}$

[Phys. Rev. B 100, 064512] Published Thu Aug 15, 2019

]]>Deploying an analytical atomistic model of the bulk band structure of the IV-VI crystalline topological insulators, we connect the spin structure of the surface state to the crystal field and spin-orbit coupling parameters of the bulk material. While the Dirac-Weyl-type topological surface state is ...

[Phys. Rev. B 100, 075130] Published Thu Aug 15, 2019

]]>An ultrathin active polarization-selective metasurface is designed and optimized for operation in the X band. The metasurface leverages the design of a previously reported passive polarization converting metasurface. Similar to the passive polarization converter, the proposed active metasurface cons...

[Phys. Rev. B 100, 075131] Published Thu Aug 15, 2019

]]>We have performed a systematic study of the physical properties and electronic structure of ${\mathrm{SrTiO}}_{3},{\mathrm{SrTi}}_{0.5}{\mathrm{Ru}}_{0.5}{\mathrm{O}}_{3}$, and ${\mathrm{SrRuO}}_{3}$. For the mixed compound, the temperature dependence of the magnetization is consistent with the occurrence of $\mathrm{Ru}Ti$ and $\mathrm{Ti}Ru$ defects. Despite being a semiconductor, the behav...

[Phys. Rev. B 100, 075132] Published Thu Aug 15, 2019

]]>We experimentally study quantized conductance in an electrostatically defined constriction in a high-mobility InAs two-dimensional electron gas. A parallel magnetic field lifts the spin degeneracy and allows for the observation of plateaus in integer multiples of ${e}^{2}/h$. Upon the application of a perp...

[Phys. Rev. B 100, 075422] Published Thu Aug 15, 2019

]]>We performed measurements of the gradient of the Casimir force between Au-coated surfaces of a sphere and a plate by means of a significantly upgraded dynamic atomic force microscope (AFM)-based technique. By introducing a combined cleaning procedure of interior surfaces of the vacuum chamber and th...

[Phys. Rev. B 100, 081406(R)] Published Thu Aug 15, 2019

]]>$\mathrm{Zn}{M}_{2}^{III}{\mathrm{O}}_{4}$ (${M}^{III}=\text{Co}$, Rh, Ir) spinels have been recently identified as promising $p$-type semiconductors for transparent electronics. However, discrepancies exist in the literature regarding their fundamental optoelectronic properties. In this paper, the electronic structures of these spinels are direct...

[Phys. Rev. B 100, 085126] Published Thu Aug 15, 2019

]]>In this work, density functional computations and Monte Carlo simulations are performed to investigate the structural, electronic, magnetic, and thermodynamic properties of a $\mathrm{Co}/{\mathrm{WS}}_{2}$ nanolayer, a semiconductor ${\mathrm{WS}}_{2}$ monolayer covered by a ferromagnetic cobalt monolayer. In addition to a conventional se...

[Phys. Rev. B 100, 085423] Published Thu Aug 15, 2019

]]>We study longitudinal transport in Weyl semimetal nanowires, both in the absence and in the presence of a magnetic flux threading the nanowires. We identify two qualitatively different regimes of transport with respect to the chemical potential in the nanowires. In the “surface regime,” for low dopi...

[Phys. Rev. B 100, 085424] Published Thu Aug 15, 2019

]]>We calculate transverse spin susceptibility in the linear response method based on the ground states determined in the quasiparticle self-consistent $GW$ (QSGW) method. Then we extract spin-wave (SW) dispersions from the susceptibility. We treat bcc Fe, hcp Co, fcc Ni, and B2-type FeCo. Because of the...

[Phys. Rev. B 100, 054419] Published Wed Aug 14, 2019

]]>We demonstrate anisotropic tunnel magnetoconductance by controllably engineering charging islands in the layered semiconducting ferromagnet ${\mathrm{Cr}}_{2}{\mathrm{Ge}}_{2}{\mathrm{Te}}_{6}$. This is achieved by assembling vertical van der Waals heterostructures comprised of graphene electrodes separated by crystals of ${\mathrm{Cr}}_{2}{\mathrm{Ge}}_{2}{\mathrm{Te}}_{6}$. Carefully...

[Phys. Rev. B 100, 054420] Published Wed Aug 14, 2019

]]>Exploiting the possibility to switch from antiferromagnetic (AFM) and ferromagnetic (FM) ground states (GSs) in out-stoichiometric branches of ${\mathrm{Ce}}_{2}{\mathrm{Pd}}_{2}\mathrm{In}$ alloys, the stability of Shastry-Sutherland (ShSu) phase of ${\mathrm{Ce}}_{2}{\mathrm{Pd}}_{2}\mathrm{Sn}$ as a function of Sn/In electron doping was studied. Magnetic and specific-heat ...

[Phys. Rev. B 100, 054421] Published Wed Aug 14, 2019

]]>The study of universal critical behavior is a crucial issue in a continuous phase transition, which groups various critical phenomena into universality classes for revealing microscopic electronic behaviors. The understanding of the nature of magnetism in Eu-based ferromagnetic superconductors is la...

[Phys. Rev. B 100, 060406(R)] Published Wed Aug 14, 2019

]]>The FeSe-based superconductors exhibit a wide range of critical temperature ${T}_{c}$ under a variety of material and physical conditions, but extensive studies to date have yet to produce a consensus view on the underlying mechanism. Here we report on a systematic Raman-scattering work on intercalated FeS...

[Phys. Rev. B 100, 060504(R)] Published Wed Aug 14, 2019

]]>Although the topic of intermittent plastic flow manifesting as load fluctuations or displacement jumps in nanoindentation (depths less than 100 nm) has attracted considerable attention, the existence of steps on load-indentation ($F\text{\u2212}z$) curves reported in microindentation (depths of several microns) o...

[Phys. Rev. B 100, 064102] Published Wed Aug 14, 2019

]]>Using high-resolution photoemission spectroscopy on *in situ* potassium surface-doped *para-*terphenyl crystals, we uncover a low-energy spectral gap of 12 meV. This spectral gap displays a strong temperature-dependent gap-filling behavior and persists up to 120 K, which is consistent with the onset tem...

[Phys. Rev. B 100, 064511] Published Wed Aug 14, 2019

]]>Most interesting examples of violations of the Mott-Ioffe-Regel (MIR) resistivity limit are found in materials with strong electronic correlations that are not well understood by theory. We demonstrate that first principles theory can predict the experimentally observed frequency dependence of the o...

[Phys. Rev. B 100, 075128] Published Wed Aug 14, 2019

]]>Electron-doped $\mathrm{S}{\mathrm{r}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}$ has been the subject of much recent attention because of its similarities with hole-doped $\mathrm{L}{\mathrm{a}}_{2}\mathrm{Cu}{\mathrm{O}}_{4}$. However, direct evidence of its superconductivity has not yet been observed, which has led to various unresolved issues related to this material. In this study, a 14-nm-thick La-...

[Phys. Rev. B 100, 075129] Published Wed Aug 14, 2019

]]>Energy levels of nitrogen-vacancy centers in diamond were investigated using optically detected magnetic-resonance spectroscopy near the electronic ground-state level anticrossing (GSLAC) at an axial magnetic field around 102.4 mT in diamond samples with a nitrogen concentration of 1 and 200 ppm. By...

[Phys. Rev. B 100, 075204] Published Wed Aug 14, 2019

]]>Recent experimental studies have found that magnetic impurities deposited on superconducting monolayer ${\mathrm{NbSe}}_{2}$ generate coupled Yu-Shiba-Rusinov bound states. Here we consider ferromagnetic chains of impurities which induce a Yu-Shiba-Rusinov band and harbor Majorana bound states at the chain edges. W...

[Phys. Rev. B 100, 075420] Published Wed Aug 14, 2019

]]>A graphene bilayer shows an unusual magnetoelectric response whose magnitude is controlled by the valley-isospin density, making it possible to link magnetoelectric behavior to valleytronics. Complementary to previous studies, we consider the effect of static homogeneous electric and magnetic fields...

[Phys. Rev. B 100, 075421] Published Wed Aug 14, 2019

]]>We express the recently introduced real-time diagrammatic quantum Monte Carlo [Phys. Rev. B **91**, 245154 (2015)] in the Larkin-Ovchinnikov basis in Keldysh space. Based on a perturbation expansion in the local interaction $U$, the special form of the interaction vertex allows us to write diagrammatic ru...

[Phys. Rev. B 100, 085125] Published Wed Aug 14, 2019

]]>The discovery and design of materials with large thermal conductivities (${\kappa}_{L}$) is critical to address future heat management challenges, particularly as devices shrink to the nanoscale. This requires developing novel physical insights into the microscropic interactions and behaviors of lattice vibrati...

[Phys. Rev. B 100, 085420] Published Wed Aug 14, 2019

]]>We propose a microscopic theory of terahertz (THz) radiation generation on metal gratings under the action of femtosecond laser pulses. In contrast to previous models, only low-frequency currents inside the metal are considered without involving electron emission and acceleration. The presented mode...

[Phys. Rev. B 100, 085421] Published Wed Aug 14, 2019

]]>Intercalation of lithium in few-layer phosphorene has aroused great concern because of the prospects of few-layer phosphorene as an anode material for high-performance lithium-ion batteries (LIBs). In this paper, we adopt first-principles calculations to explore in detail the effects of stacking str...

[Phys. Rev. B 100, 085422] Published Wed Aug 14, 2019

]]>Skyrmions with multiple helicity or topology in centrosymmetric crystals are intriguing magnetic-domain objects due to their diverse dynamics under external stimuli. Here we illustrate how the two key gradients of magnetocrystalline anisotropy (MCA) and spin reorientation transition (SRT) affect the...

[Phys. Rev. B 100, 054416] Published Tue Aug 13, 2019

]]>A neutron powder diffraction experiment has been performed on the quasicrystal approximant ${\mathrm{Au}}_{72}{\mathrm{Al}}_{14}{\mathrm{Tb}}_{14}$, a body-centered-cubic crystal of icosahedral spin clusters. The long-range antiferromagnetic order was confirmed at the transition temperature ${T}_{\mathrm{N}}=10.4$ K. The magnetic structure consists of noncop...

[Phys. Rev. B 100, 054417] Published Tue Aug 13, 2019

]]>Magnetic transitions in a single crystal of the orthoferrite ${\mathrm{ErFeO}}_{3}$ have been studied between 2 and 300 K using conventional superconducting quantum interference device measurements as well as pulsed high magnetic fields of up to 58 T. Spontaneous spin reorientations, as well as temperature and magn...

[Phys. Rev. B 100, 054418] Published Tue Aug 13, 2019

]]>Iridium oxides have provided a playground to study novel phases originating from spin-orbit coupling and electron-electron interactions. Among them, the $d$-wave singlet superconductor was proposed for electron-doped ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$, containing two Ir atoms in a unit cell due to the staggered rotation of oxyg...

[Phys. Rev. B 100, 054512] Published Tue Aug 13, 2019

]]>The realization of spin-based logical gates crucially depends on magnetically coupled spin qubits. Thus, understanding decoherence when spin qubits are in close proximity will become a roadblock to overcome. Herein, we propose a method free of fitting parameters to evaluate the qubit phase memory ti...

[Phys. Rev. B 100, 064405] Published Tue Aug 13, 2019

]]>Transverse domain wall (TDW) dynamics in long and narrow spin valves with perpendicular current injection is theoretically investigated. We demonstrate that stable traveling-wave motion of TDWs with finite velocity survives for strong enough planar-transverse polarizers. For typical ferromagnetic ma...

[Phys. Rev. B 100, 064406] Published Tue Aug 13, 2019

]]>Nonequilibrium susceptibility in photoinduced Floquet states is studied. We analyze an electron system coupled with a heat bath in a time-periodic electric field. Spin/charge susceptibility is formulated on the basis of the Floquet Green's function method, and is calculated numerically in a wide ran...

[Phys. Rev. B 100, 075127] Published Tue Aug 13, 2019

]]>I study theoretically quadrupolar topological insulators under applied static electric field rotated along the crystal axis. I demonstrate that the energy spectrum of this structure is a Wannier-Stark ladder that naturally visualizes the quantization of nested Wilson loops for the bulk bands. This e...

[Phys. Rev. B 100, 075418] Published Tue Aug 13, 2019

]]>Novel lateral optical forces acting on dipoles near surfaces have been investigated in the past few years: circularly polarized dipoles experience lateral optical forces when in proximity to a surface due to the recoil of directionally excited modes. Recent work shows that even linearly polarized di...

[Phys. Rev. B 100, 075419] Published Tue Aug 13, 2019

]]>We reveal a proximity effect between a topological band (Chern) insulator described by a Haldane model and spin-polarized Dirac particles of a graphene layer. Coupling weakly the two systems through a tunneling term in the bulk, the topological Chern insulator induces a gap and an opposite Chern num...

[Phys. Rev. B 100, 081107(R)] Published Tue Aug 13, 2019

]]>Coulomb drag between nanoscale conductors is of both fundamental and practical interest. Here, we theoretically study drag in a double quantum dot (QD) system consisting of a biased drive QD and an unbiased drag QD coupled via a direct interdot Coulomb interaction. We demonstrate that the Coulomb dr...

[Phys. Rev. B 100, 081404(R)] Published Tue Aug 13, 2019

]]>We show that electronic materials with disallowed rotational symmetries that enforce quasiperiodic order can exhibit quantum oscillations and that these are generically associated with exotic “spiral Fermi surfaces.” These Fermi surfaces are self-intersecting, and characterized by a winding number o...

[Phys. Rev. B 100, 081405(R)] Published Tue Aug 13, 2019

]]>Thanks to the development in quantum Monte Carlo technique, the compact U(1) lattice gauge theory coupled to fermionic matter at ($2+1$)D is now accessible with large-scale numerical simulations, and the ground state phase diagram as a function of fermion flavor (${N}_{f}$) and the strength of gauge fluctuat...

[Phys. Rev. B 100, 085123] Published Tue Aug 13, 2019

]]>The observation of quantum oscillations in topological Kondo insulators ${\mathrm{SmB}}_{6}$ and ${\mathrm{YbB}}_{12}$ is a recent puzzling experimental discovery. Quantum oscillations observed in the resistivity and the magnetization are usually explained by the existence of the Fermi surface. However, Kondo insulators do not hav...

[Phys. Rev. B 100, 085124] Published Tue Aug 13, 2019

]]>The three-qubit Toffoli gate plays an important role in quantum error correction and complex quantum algorithms such as Shor's factoring algorithm, motivating the search for efficient implementations of this gate. Here we introduce a Toffoli gate suitable for exchange-coupled electron spin qubits in...

[Phys. Rev. B 100, 085419] Published Tue Aug 13, 2019

]]>[Phys. Rev. B 100, 089902] Published Tue Aug 13, 2019

]]>[Phys. Rev. B 100, 089903] Published Tue Aug 13, 2019

]]>To describe all possible injection locking configurations of spin torque nano-oscillators (STNO), previous analytical descriptions are extended by introducing the most general form of the driving force: $\mathcal{F}\propto \phantom{\rule{4pt}{0ex}}{\varepsilon}_{1}\mathrm{cos}\psi \phantom{\rule{4pt}{0ex}}+i{\varepsilon}_{2}\mathrm{sin}\phantom{\rule{4pt}{0ex}}\psi $. We provide the expressions of the corresponding forcing functions $\mathcal{F}$ for the six...

[Phys. Rev. B 100, 054414] Published Mon Aug 12, 2019

]]>We present a theoretical formalism to address the dynamics of textured, noncollinear antiferromagnets subject to spin current injection. We derive sine-Gordon type equations of motion for the antiferromagnets, which are applicable to technologically important antiferromagnets such as ${\mathrm{Mn}}_{3}\mathrm{Ir}$ and ${\mathrm{Mn}}_{3}\mathrm{Sn}$...

[Phys. Rev. B 100, 054415] Published Mon Aug 12, 2019

]]>In this paper, we study nonanalyticities or cusps near a topological phase transition driven by changes of global topologies rather than by the formation of conventional (local) order. The particular phase transitions between topologically ordered superfluids and nontopological superfluids studied i...

[Phys. Rev. B 100, 054508] Published Mon Aug 12, 2019

]]>Since very few type-I superconductors are known and most are elemental superconductors, there are very few experimental platforms where the interaction between type-I superconductivity and topologically nontrivial band structure can be probed. The rhenium aluminide ${\mathrm{Al}}_{6}\mathrm{Re}$ has recently been identified...

[Phys. Rev. B 100, 054509] Published Mon Aug 12, 2019

]]>The iron-based superconductors represent a promising platform for high-temperature superconductivity, but the interactions underpinning their pairing present a puzzle. The ${\mathrm{EuFe}}_{2}{\mathrm{As}}_{2}$ family is unique among these materials for having magnetic order which onsets within the superconducting state, just be...

[Phys. Rev. B 100, 054510] Published Mon Aug 12, 2019

]]>We present a detailed theoretical description of quantum coherent electron transport in voltage-biased crosslike Andreev interferometers. Making use of the charge conjugation symmetry encoded in the quasiclassical formalism, we elucidate a crucial role played by geometric and electron-hole asymmetri...

[Phys. Rev. B 100, 054511] Published Mon Aug 12, 2019

]]>$\mathrm{A}{\mathrm{u}}_{2}\mathrm{Pb}$ is a candidate of natural topological superconductors that has attracted much attention in the last few years. Combining *ab initio* calculations with machine-learning accelerated crystal structure searches, we have found two ground states of $\mathrm{A}{\mathrm{u}}_{2}\mathrm{Pb}$: $Pca{2}_{1}$ phase at ambient pressure and $I\overline{4}2d$ phas...

[Phys. Rev. B 100, 060103(R)] Published Mon Aug 12, 2019

]]>Systems lacking time-inversion or centrosymmetry exhibit nonreciprocal magnon transport. Their dynamical magnetic structure factor is asymmetric with respect to the inversion of the reduced momentum, transferred to the system. In this work, the authors establish the helical itinerant-electron magnet MnSi as an archetypical model for nonreciprocal phenomena by comparing polarized inelastic neutron scattering data with mean-field linear spin-wave calculations.

[Phys. Rev. B 100, 060404(R)] Published Mon Aug 12, 2019

]]>An external magnetic field can induce a transition in $\alpha \text{\u2212}{\mathrm{RuCl}}_{3}$ from an ordered zigzag state to a disordered state that is possibly related to the Kitaev quantum spin liquid. Here, we present field-dependent inelastic neutron scattering and magnetocaloric effect measurements implying the existence of ...

[Phys. Rev. B 100, 060405(R)] Published Mon Aug 12, 2019

]]>To identify the key parameter for optimal superconductivity in iron pnictides, we measured the ${}^{31}\mathrm{P}$-NMR relaxation rate on ${\mathrm{BaFe}}_{2}{\left({\mathrm{As}}_{1-x}{\mathrm{P}}_{x}\right)}_{2}\phantom{\rule{4pt}{0ex}}(x=0.22$ and 0.28) under pressure and compared the effects of chemical substitution and physical pressure. For $x=0.22$, structural and antiferromagnetic (AFM) transi...

[Phys. Rev. B 100, 060503(R)] Published Mon Aug 12, 2019

]]>We study an extended Aubry-André-Harper model with simultaneous modulation of hopping on-site potential and $p$-wave superconducting pairing. For the case of commensurate modulation of $\beta =1/2$ it is shown that the model hosts four different types of topological states: Adiabatic cycles can be defined wh...

[Phys. Rev. B 100, 064202] Published Mon Aug 12, 2019

]]>We demonstrate a possibility of using geometry to deterministically control nonlocal correlation of waves undergoing mesoscopic transport through a disordered waveguide. In case of nondissipative medium, we find an explicit relationship between correlation and the shape of the system. Inverting this...

[Phys. Rev. B 100, 064203] Published Mon Aug 12, 2019

]]>We study the field for the penetration of a first vortex, ${H}_{\mathrm{P}}$, for vortex matter nucleated in micron-sized samples with edges aligned along the nodal and antinodal directions of the $d$-wave superconducting order parameter of ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8-\delta}$. Here we present evidence that the ${H}_{\mathrm{P}}$ for vortex matter nucle...

[Phys. Rev. B 100, 064508] Published Mon Aug 12, 2019

]]>Realization of topological superconductors is one of the most important goals in studies of topological phases in quantum materials. In this work we theoretically propose a way to attain topological superconductors with nontrivial Fermi surfaces of Bogoliubov quasiparticles. Considering the interact...

[Phys. Rev. B 100, 064509] Published Mon Aug 12, 2019

]]>A combination of strong Cooper pairing and weak superconducting fluctuations is crucial to achieve and stabilize high-${T}_{c}$ superconductivity. We demonstrate that a coexistence of a shallow carrier band with strong pairing and a deep band with weak pairing, together with the Josephson-like pair transfe...

[Phys. Rev. B 100, 064510] Published Mon Aug 12, 2019

]]>We consider a two-dimensional model of particles interacting in a Landau level. We work in a finite disk geometry and take the particles to interact with a linearly decreasing two-body Haldane pseudopotential. We show that the ground-state subspace of this model is spanned by the wave functions that...

[Phys. Rev. B 100, 075122] Published Mon Aug 12, 2019

]]>We compute dynamic spin susceptibilities in the two-dimensional Hubbard model using the method of dual fermions, and we provide a comparison to lattice Monte Carlo and cluster dynamical mean-field theory. We examine the energy dispersion identified by peaks in $\mathrm{Im}\chi (\omega ,q)$, which define spin modes, and ...

[Phys. Rev. B 100, 075123] Published Mon Aug 12, 2019

]]>The ground-state density of states of the half-filled Falicov-Kimball model contains a charge-density-wave gap. At finite temperature, this gap is not immediately closed, but is rather filled in by subgap states. For a specific combination of parameters, this leads to a stable phase where the system...

[Phys. Rev. B 100, 075124] Published Mon Aug 12, 2019

]]>The pyrochlore materials have long been predicted to harbor a quantum spin liquid, an intrinsic long-range-entangled state supporting fractionalized excitations. Existing pyrochlore experiments, on the other hand, have discovered several weakly ordered states and a tendency of close competition amon...

[Phys. Rev. B 100, 075125] Published Mon Aug 12, 2019

]]>In the presence of symmetries, one-dimensional quantum systems can exhibit topological order, which in many cases can be characterized by a quantized value of the many-body geometric Zak or Berry phase. We establish that this topological Zak phase is directly related to the Zak phase of an elementar...

[Phys. Rev. B 100, 075126] Published Mon Aug 12, 2019

]]>We study the in-plane acoustic phonons in twisted bilayer graphenes using the effective continuum approach. We calculate the phonon modes by solving the continuum equation of motion for infinitesimal vibration around the static relaxed state with triangular domain structure. We find that the moiré i...

[Phys. Rev. B 100, 075416] Published Mon Aug 12, 2019

]]>Out-of-plane vibrations are considered as the dominant factor limiting the intrinsic carrier mobility of suspended two-dimensional materials at low carrier concentrations. Anharmonic coupling between in-plane and flexural phonon modes is usually excluded from the consideration. Here we present a the...

[Phys. Rev. B 100, 075417] Published Mon Aug 12, 2019

]]>Quantum field theories of many-body systems predict “instantonic crystals” connecting degenerate thermodynamic states with classically broken symmetries. The instantons break continuous translation symmetry of Euclidean space along the axis of imaginary time. The possibility for the emergence of “thermodynamic quantum time crystals” that extremize the Euclidean action of the system appeals to the imagination. However, the authors prove here that at least two general classes of “instantonic crystals”, connecting states of Fermi systems with charge, spin, or superconducting orders can constitute neither thermodynamic equilibrium nor the ground state.

[Phys. Rev. B 100, 081103(R)] Published Mon Aug 12, 2019

]]>Given the rising importance of non-Hermitian theories that describe open lossy systems, significant research has focused on studying non-Hermitian topological invariants. However, recent work suggests that related observables may no longer be quantized. Here, the authors illustrate the underlying structure of the Green’s function of non-Hermitian Hamiltonians that precludes the quantization of the Chern-Simons coefficient, resulting in the nonquantization of the Hall response of non-Hermitian Chern insulators. By showing nonquantization across a broad class of non-Hermitian Hamiltonians, the authors demonstrate the disconnect in non-Hermitian systems between a topological invariant, the Chern number, and its associated observable, the Hall conductivity.

[Phys. Rev. B 100, 081104(R)] Published Mon Aug 12, 2019

]]>We report a detailed experimental study of the band structure of the recently discovered topological material ${\mathrm{Hf}}_{2}{\mathrm{Te}}_{2}\mathrm{P}$. Using the combination of scanning tunneling spectroscopy and angle-resolved photoemission spectroscopy with surface K doping, we probe the band structure of ${\mathrm{Hf}}_{2}{\mathrm{Te}}_{2}\mathrm{P}$ with energy and ...

[Phys. Rev. B 100, 081105(R)] Published Mon Aug 12, 2019

]]>We provide here a direct and exact formalism to describe the formation of edge or surface states, as well as to calculate boundary Green's functions. Modeling the boundary as an impurity potential, we show via the T-matrix formalism that the impurity states evolve into boundary modes when the impuri...

[Phys. Rev. B 100, 081106(R)] Published Mon Aug 12, 2019

]]>We report the synthesis and detailed investigation of the single crystal ${\mathrm{CePd}}_{2}{\mathrm{Al}}_{8}$. Resistivity measurements reveal typical metallic behavior at high temperatures and a plateau at about 15 K followed by a rapid drop due to successive antiferromagnetic (AFM) and ferromagnetic (FM) transitions. The spe...

[Phys. Rev. B 100, 085122] Published Mon Aug 12, 2019

]]>We adopt a high-throughput search strategy that begins with electronic structure features to screen a set of half-Heusler compounds for thermoelectric performance. This is motivated by the contradictory electrical transport requirements, specifically high electrical conductivity $\sigma $ and high thermopow...

[Phys. Rev. B 100, 085202] Published Mon Aug 12, 2019

]]>Combining first-principles calculations with Landauer-Büttiker formalism, ballistic thermoelectric transport properties of semiconducting two-dimensional transition metal dichalcogenides (TMDs) and oxides (TMOs) (namely ${\mathrm{MX}}_{2}$ with M = Cr, Mo, W, Ti, Zr, Hf; X = O, S, Se, Te) are investigated in their ...

[Phys. Rev. B 100, 085415] Published Mon Aug 12, 2019

]]>Mono- and few-layer transition-metal dichalcogenides (TMDCs) provide opportunities for ideal two-dimensional semiconductors for electronic and optoelectronic devices. For electronic devices on TMDCs, it is essential to incorporate $n$- and/or $p$-type dopants which are stable in positions after patterne...

[Phys. Rev. B 100, 085416] Published Mon Aug 12, 2019

]]>Recent advances in ultrashort laser pulse techniques have opened up a wide variety of applications in both fundamental physics and industrial fields. In this work, $ab\phantom{\rule{4pt}{0ex}}initio$ molecular dynamics simulations based on time-dependent density functional theory revealed a steady deceleration of lattice dist...

[Phys. Rev. B 100, 085417] Published Mon Aug 12, 2019

]]>We investigate the transport properties of a superconducting quantum point contact in the presence of an arbitrary periodic drive. In particular, we calculate the DC current and noise in the tunnel limit, obtaining general expressions in terms of photoassisted probabilities. Interesting features can...

[Phys. Rev. B 100, 085418] Published Mon Aug 12, 2019

]]>[Phys. Rev. B 100, 089901] Published Mon Aug 12, 2019

]]>Whereas magnetic frustration is typically associated with local-moment magnets in special geometric arrangements, here we show that ${\mathrm{SrCo}}_{2}{\mathrm{As}}_{2}$ is a candidate for frustrated itinerant magnetism. Using inelastic neutron scattering (INS), we find that antiferromagnetic (AF) spin fluctuations develop in t...

[Phys. Rev. B 100, 054411] Published Fri Aug 09, 2019

]]>By combining high spinning speed (60 kHz) and low-field (4.7 T) ${}^{31}\mathrm{P}$ solid-state NMR with magnetic susceptibility measurements, we experimentally characterized a series of solid solutions belonging to the $\mathrm{L}{\mathrm{a}}_{x}\mathrm{E}{\mathrm{u}}_{1-x}\mathrm{P}{\mathrm{O}}_{4}$ ($0\le x\le 1$) series. Analyses of the magnetic susceptibility data were carried out using ...

[Phys. Rev. B 100, 054412] Published Fri Aug 09, 2019

]]>The magnetization-density distribution in the metallic ferromagnet ${\mathrm{SrRuO}}_{3}$ was studied by means of polarized neutron diffraction. The analyzes by multipole refinements and by the maximum entropy method consistently reveal a strong polarization of all oxygen sites carrying 30% of the total magnetizati...

[Phys. Rev. B 100, 054413] Published Fri Aug 09, 2019

]]>Materials either have a high hardness or excellent ductility, but rarely both at the same time. ${\mathrm{Mo}}_{2}\mathrm{BC}$ is one of the only crystalline materials that simultaneously has a high Vickers hardness and is also moderately ductile. The origin of this unique balance is revealed here using stress-strain calcul...

[Phys. Rev. B 100, 060102(R)] Published Fri Aug 09, 2019

]]>The anomalous Hall effect reflects abundant spin physics encompassing the Berry phase, spin texture, impurity scatterings, etc. Here, we study the anomalous Hall effect in epitaxial thin films of ${\mathrm{SrCoO}}_{3}$, a perovskite oxide hosting the unique intermediate spin state. We observe a sign reversal in the...

[Phys. Rev. B 100, 060403(R)] Published Fri Aug 09, 2019

]]>Understanding the mechanisms of thermal conduction in graphene is a longstanding research topic due to its high thermal conductivity. Studies based on the Peierls-Boltzmann transport equation (PBTE) have revealed many unique phonon transport properties in graphene, but most previous works considered...

[Phys. Rev. B 100, 064306] Published Fri Aug 09, 2019

]]>By self-consistently resolving the disentanglement of the spin Hall angle (SHA) and the spin diffusion length (SDL) through the ratio of Hanle and spin Hall magnetoresistances, the SHA in heavy metals has been for the first time rigorously extracted. For Pt on ferromagnetic insulator ${\mathrm{Y}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$, the g...

[Phys. Rev. B 100, 064404] Published Fri Aug 09, 2019

]]>We study, theoretically, the single-photon response of a strongly disordered thin superconducting strip in the flux flow state. We find that this resistive state, at a current $I$ larger than the critical current ${I}_{c}$, jumps to the normal state by the absorption of a single optical photon. The absorbed ...

[Phys. Rev. B 100, 064507] Published Fri Aug 09, 2019

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