We experimentally show that the angular distribution of diffusely transmitted light from highly scattering dense media, such as photonic glasses, deviates significantly from Fresnel's law. We model a system of a photonic glass on a substrate by introducing an optical boundary layer that is sandwiche...

[Phys. Rev. B 99, 054206] Published Tue Feb 19, 2019

]]>Amorphous carbon (a-C) occurs as a tribologically induced phase in diamond or diamond-like carbon coatings. The interaction of ambient gases (${\mathrm{H}}_{2}$, ${\mathrm{N}}_{2}$, ${\mathrm{O}}_{2}$, ${\mathrm{H}}_{2}\mathrm{O}$, ${\mathrm{CO}}_{2}$) with a-C of varying mass density is studied by means of *ab initio* thermodynamics simulations. Different scenarios such as moist air or p...

[Phys. Rev. B 99, 054207] Published Tue Feb 19, 2019

]]>Schwinger Keldysh field theory is a widely used paradigm to study nonequilibrium dynamics of quantum many-body systems starting from a thermal state. We extend this formalism to describe nonequilibrium dynamics of quantum systems starting from arbitrary initial many-body density matrices. We show ho...

[Phys. Rev. B 99, 054306] Published Tue Feb 19, 2019

]]>The fully relativistic disordered local moment (DLM) theory is used to perform calculations of the magnetic torque of tetragonally distorted Fe and fully disordered $\left(A2\right)\phantom{\rule{4pt}{0ex}}{\mathrm{Fe}}_{1-x}{\mathrm{Ga}}_{x}\phantom{\rule{4pt}{0ex}}\left(0\le x\le 0.2\right)$ alloys to describe the temperature dependence of their magnetoelasticity. The finite-temperature magnetoelasticit...

[Phys. Rev. B 99, 054415] Published Tue Feb 19, 2019

]]>We study the low temperature static and dynamical properties of the classical bond-disordered antiferromagnetic Heisenberg model on the kagome lattice. This model has recently been shown to host a new type of spin liquid exhibiting an exponentially large number of *discrete* ground states. Surprisingl...

[Phys. Rev. B 99, 054416] Published Tue Feb 19, 2019

]]>We have investigated the thermodynamic and local magnetic properties of the Mott insulating system ${\mathrm{Ag}}_{3}{\mathrm{LiRu}}_{2}{\mathrm{O}}_{6}$ containing ${\mathrm{Ru}}^{4+}$ ($4{d}^{4}$) for novel magnetism. The material crystallizes in a monoclinic $C2/m$ structure with ${\mathrm{RuO}}_{6}$ octahedra forming an edge-shared two-dimensional honeycomb lattice with limited ...

[Phys. Rev. B 99, 054417] Published Tue Feb 19, 2019

]]>Using a realistic tight-binding Hamiltonian based on maximally localized Wannier functions, we investigate the two-ion magnetocrystalline anisotropy energy (MAE) in $L{1}_{0}$ transition metal compounds. MAE contributions from throughout the Brillouin zone are obtained using magnetic force theorem calculat...

[Phys. Rev. B 99, 054418] Published Tue Feb 19, 2019

]]>The static magnetization and dynamic susceptibility responses of the cluster system within a Griffiths phase of the magnetocaloric compound ${\mathrm{Tb}}_{5-x}{\mathrm{La}}_{x}{\mathrm{Si}}_{2}{\mathrm{Ge}}_{2}$ ($x=0.075$) have been investigated. A novel cluster-glass state within the Griffiths phase is formed at a characteristic freezing temperature where...

[Phys. Rev. B 99, 054419] Published Tue Feb 19, 2019

]]>We observe that an rf microwave field strongly influences the transport of incoherent thermal magnons in yttrium iron garnet. Ferromagnetic resonance in the nonlinear regime suppresses thermal magnon transport by $95\%$. The transport is also modulated at nonresonant conditions in two cases, both relat...

[Phys. Rev. B 99, 054420] Published Tue Feb 19, 2019

]]>We report the properties of a triangular lattice iron-chalcogenide antiferromagnet ${\mathrm{FeAl}}_{2}{\mathrm{Se}}_{4}$.The spin susceptibility reveals a significant antiferromagnetic interaction with a Curie-Weiss temperature ${\mathrm{\Theta}}_{\text{CW}}\simeq -200\phantom{\rule{3.33333pt}{0ex}}\text{K}$ and a spin-2 local moment. Despite a large spin and a large $|{\mathrm{\Theta}}_{\text{CW}}|$, the low-temperature beha...

[Phys. Rev. B 99, 054421] Published Tue Feb 19, 2019

]]>We study the effect of a parallel magnetic field in a thin and small superconductor. The field suppresses superconductivity through Zeeman coupling while stabilizing the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state at high fields before superconductivity is destroyed. When the spatial period of FFL...

[Phys. Rev. B 99, 054509] Published Tue Feb 19, 2019

]]>Superfluid ${}^{3}\mathrm{He}$ has a rich spectrum of collective modes with both massive and massless excitations. The masses of these modes can be precisely measured using acoustic spectroscopy and fit to theoretical models. Prior comparisons of the experimental results with theory did not include strong-coupling ...

[Phys. Rev. B 99, 054510] Published Tue Feb 19, 2019

]]>We present a unified analysis of the drag forces acting on oscillating bodies submerged in superfluid helium such as a vibrating wire resonator, tuning forks, a double-paddle oscillator, and a torsionally oscillating disk. We find that for high-Stokes-number oscillatory flows, the drag force origina...

[Phys. Rev. B 99, 054511] Published Tue Feb 19, 2019

]]>We investigate charge densities around the vortex cores of an $s$-wave and a chiral $p$-wave superconductor (SC) in two dimensions within quasiclassical theory. We consider contributions of particle-hole asymmetry through gradient expansions in first order of a quasiclassical parameter using augmented q...

[Phys. Rev. B 99, 054512] Published Tue Feb 19, 2019

]]>We investigated the superconducting fluctuation in FeSe, which is assumed to be located in the BCS-BEC crossover region, via magnetic torque measurements. In our method, the absolute cantilever displacement is measured by detecting the interference intensity of the Fabry-Pérot cavity formed between ...

[Phys. Rev. B 99, 060503(R)] Published Tue Feb 19, 2019

]]>The properties of stress-free and biaxially strained stoichiometric $\mathrm{SrTi}{\mathrm{O}}_{3}$ in the absence and presence of antiferrodistortive (AFD) distortion were calculated *ab initio*. To obtain reliable results, multiple exchange correlation (XC) functionals, including the Heyd-Scuseria-Ernzerhof (HSE) hybrid fun...

[Phys. Rev. B 99, 064107] Published Tue Feb 19, 2019

]]>Density functional alloy theory is used to accurately describe the three core effects controlling the thermodynamics of random Cu-Au alloys. These three core effects are exchange correlation (XC), local lattice relaxations (LLRs), and short-range order (SRO). Within the real-space grid-based project...

[Phys. Rev. B 99, 064202] Published Tue Feb 19, 2019

]]>We numerically investigate the stationary and nonequilibrium critical dynamics in three-dimensional isotropic Heisenberg antiferromagnets. Since the nonconserved staggered magnetization couples dynamically to the conserved magnetization density, we employ a hybrid simulation algorithm that combines ...

[Phys. Rev. B 99, 064417] Published Tue Feb 19, 2019

]]>We have studied the impact of lattice geometry on the dynamic properties of close-spaced arrays of circular nanomagnets, also known as magnonic crystals. To this end, we prepared 2D nanomagnet arrays with both square and hexagonal lattice symmetries (300-nm disk diameter, 400-nm center-to-center dis...

[Phys. Rev. B 99, 064418] Published Tue Feb 19, 2019

]]>We present a detailed investigation of the physical properties of ${\mathrm{Ce}}_{2}\mathrm{Sb}$ and ${\mathrm{Ce}}_{2}\mathrm{Bi}$ single crystals, which undergo antiferromagnetic transitions at around 8.2 and 10 K, respectively. When magnetic fields are applied parallel to the $c$ axis, metamagnetic transitions are observed at low temperatures, cor...

[Phys. Rev. B 99, 064419] Published Tue Feb 19, 2019

]]>Sharp magnetization switching and large magnetoresistance (MR) were previously discovered in single crystals of 2H-${\mathrm{Fe}}_{x}{\mathrm{TaS}}_{2}$ and attributed to the Fe superstructure and its defects. We report similar sharp switching and large MR in 1T-${\mathrm{Fe}}_{x}{\mathrm{TiS}}_{2}$ ($0.086\phantom{\rule{0.28em}{0ex}}\le \phantom{\rule{0.28em}{0ex}}x\phantom{\rule{0.28em}{0ex}}\le 0.703$) while providing a side-by-side comparison o...

[Phys. Rev. B 99, 064420] Published Tue Feb 19, 2019

]]>We present a theoretical study of excitations formed by hybridization between magnons and phonons—magnon-polarons—in antiferromagnets. We first outline a general approach to determining which magnon and phonon modes can and cannot hybridize in a system thereby addressing the qualitative questions co...

[Phys. Rev. B 99, 064421] Published Tue Feb 19, 2019

]]>We report all phases and corresponding critical lines of the quantum anisotropic transverse XY model with uniform and alternating transverse magnetic fields (ATXY) in the presence of the Dzyaloshinskii-Moriya (DM) interaction by using appropriately chosen order parameters. We prove that when DM inte...

[Phys. Rev. B 99, 064422] Published Tue Feb 19, 2019

]]>We probe the local magnetic properties of interfaces between the insulating ferromagnet EuS and the topological insulator ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ using low energy muon spin rotation ($\mathrm{LE}-\mu \mathrm{SR}$). We compare these to the interface between EuS and the topologically trivial metal, titanium. Below the magnetic transition of...

[Phys. Rev. B 99, 064423] Published Tue Feb 19, 2019

]]>The electrical detection of spin-torque ferromagnetic resonance (st-FMR) is becoming a popular method for measuring the spin-Hall angle of heavy metals (HM). However, various sensible analysis on the same material with either the same or different experimental setups yielded different spin-Hall angl...

[Phys. Rev. B 99, 064424] Published Tue Feb 19, 2019

]]>Compounds of transition metal ions with strong spin-orbit coupling recently attracted attention due to the possibility to host frustrated bond-dependent anisotropic magnetic interactions. In general, such interactions lead to complex phase diagrams that may include exotic phases, e.g., the Kitaev sp...

[Phys. Rev. B 99, 064425] Published Tue Feb 19, 2019

]]>Magnetic skyrmions are topologically protected excitations of the magnetization vector field with promising applications in spintronics and spin-caloritronics, particularly due to their high mobility. Skyrmions can be steered by a spin-polarized charge current or by exposure to a magnonic spin curre...

[Phys. Rev. B 99, 064426] Published Tue Feb 19, 2019

]]>Since Ginzburg and Landau's seminal work in 1950, superconducting states have been classified by the hierarchy of the fundamental length scales of the theory, the magnetic-field penetration lengths and coherence lengths. In the simplest single-component case they form a dimensionless ratio $\kappa $. The mo...

[Phys. Rev. B 99, 064509] Published Tue Feb 19, 2019

]]>On the basis of the microscopic quasiclassical Eilenberger theory, we analyze the recent angle-resolved specific heat experiment carried out at low temperature for ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ to identify the superconducting gap symmetry, comprising either horizontal or vertical line nodes relative to the tetragonal cry...

[Phys. Rev. B 99, 064510] Published Tue Feb 19, 2019

]]>Bipartite fluctuations can provide interesting information about entanglement properties and correlations in many-body quantum systems. We address such fluctuations in relation with the topology of Dirac and Weyl quantum systems, in situations where the relevant particle number is not conserved, lea...

[Phys. Rev. B 99, 075133] Published Tue Feb 19, 2019

]]>We analyze theoretically nuclear magnetic resonance data for the spin-density-wave phase in the ruthenium-doped ${\mathrm{BaFe}}_{2}{\mathrm{As}}_{2}$. Since inhomogeneous distribution of Ru atoms introduces disorder into the system, experimentally observable random spatial variations of the spin-density-wave order parameter eme...

[Phys. Rev. B 99, 075134] Published Tue Feb 19, 2019

]]>Although cuprate high-temperature superconductors were discovered already in 1986 the origin of the pairing mechanism remains elusive. While the doped compounds are superconducting with high transition temperatures ${T}_{c}$, the undoped compounds are insulating due to the strong effective Coulomb interact...

[Phys. Rev. B 99, 075135] Published Tue Feb 19, 2019

]]>Finding a new class of materials supporting a long spin lifetime is essential in development of energy-saving spintronics, which is achievable by using persistent spin helix (PSH) materials. However, for spintronic devices, the PSH states with large spin splitting are required for operation at room ...

[Phys. Rev. B 99, 075136] Published Tue Feb 19, 2019

]]>We present systematic theoretical studies of both bulk and surface electromagnetic eigenmodes, or polaritons, in Weyl semimetals in the minimal model of two bands with two separated Weyl nodes. We derive the tensors of bulk and surface conductivity taking into account all possible combinations of th...

[Phys. Rev. B 99, 075137] Published Tue Feb 19, 2019

]]>In this work, we solve analytically the wave function of the surface states in a generic continuous model describing two-node type-I and -II Weyl and Dirac semimetals or single nodal-line type-I and -II semimetals within a slab geometry. Depending on the values of the parameters, different types of ...

[Phys. Rev. B 99, 075304] Published Tue Feb 19, 2019

]]>Discovering peak-performing components, under certain structural and material constraints, is vital for the efficient operation of integrated systems that incorporate them. This becomes feasible by comprehensive scanning of the parametric space for one of the simplest classes of three-dimensional pa...

[Phys. Rev. B 99, 075305] Published Tue Feb 19, 2019

]]>By performing density functional theory and Green's functions calculations, complemented by x-ray photoemission spectroscopy, we investigate the electronic structure of Fe/GeTe(111), a prototypical ferromagnetic/Rashba-ferroelectric interface. We reveal that such a system exhibits several intriguing...

[Phys. Rev. B 99, 075306] Published Tue Feb 19, 2019

]]>We use time-resolved detection of the Hanle effect and polarized photoluminescence with dark intervals to investigate the buildup and decay of the spin polarization of nuclei interacting with donor-bound electrons in $n$-doped GaAs. Strong hyperfine coupling defines the millisecond time scale of the s...

[Phys. Rev. B 99, 075307] Published Tue Feb 19, 2019

]]>We develop a multipolar theory of second-harmonic generation (SHG) by dielectric nanoparticles made of noncentrosymmetric materials with bulk quadratic nonlinearity. We specifically analyze two regimes of optical excitation: illumination by a plane wave and single-mode excitation, when the laser pum...

[Phys. Rev. B 99, 075425] Published Tue Feb 19, 2019

]]>In crystalline systems, charge polarization is related to the Zak phase determined by bulk band topology. Nontrivial charge polarization induces robust edge states accompanied by fractional charge. In the Su-Schrieffer-Heeger model, it is known that the strong modulation of electron hopping causes n...

[Phys. Rev. B 99, 075426] Published Tue Feb 19, 2019

]]>The electronic structure of few-layer (FL) black phosphorus (BP) sensitively depends on the sample thickness, strain, and doping. We show that it is also vulnerable to air exposure. The oxidation of BP caused by air exposure gives several optical signatures, including the broadening of resonance pea...

[Phys. Rev. B 99, 075427] Published Tue Feb 19, 2019

]]>We discuss and qualify the connection between two separate phenomena in the physics of nanoscale friction, general in nature and relevant to experiments. The first is thermally assisted lubricity (TAL), i.e., the low-velocity regime where a nanosized dry slider exhibits a viscouslike friction despit...

[Phys. Rev. B 99, 075428] Published Tue Feb 19, 2019

]]>We investigate the nonlocal thermoelectric transport in a Cooper-pair splitter based on a double-quantum-dot-superconductor three-terminal hybrid structure. We find that the nonlocal coupling between the superconductor and the quantum dots gives rise to nonlocal thermoelectric effects which originat...

[Phys. Rev. B 99, 075429] Published Tue Feb 19, 2019

]]>Recent progress in the fabrication techniques of superlattices (SLs) has made it possible to sandwich several-layer-thick block layers (BLs) of heavy-fermion superconductor ${\mathrm{CeCoIn}}_{5}$ between conventional-metal ${\mathrm{YbCoIn}}_{5}$ BLs or spin-density-wave-metal ${\mathrm{CeRhIn}}_{5}$ BLs of a similar thickness. However, the magn...

[Phys. Rev. B 99, 081115(R)] Published Tue Feb 19, 2019

]]>Two-dimensional (2D) electron systems with a combined Rashba and Dresselhaus spin-orbit interaction (SOI) having a complicated energy spectrum with a conical point and four critical points are promising candidates to observe electron topological transitions. In the present paper we have investigated...

[Phys. Rev. B 99, 085129] Published Tue Feb 19, 2019

]]>CrGe belongs to the family of cubic B20 intermetallics. From experimental investigations by susceptibility and de Haas-van Alphen (dHvA) measurements and from calculations of its electronic band structure by density-functional theory (DFT), CrGe is found to form a metallic paramagnetic ground state....

[Phys. Rev. B 99, 085130] Published Tue Feb 19, 2019

]]>We study ordered phases with broken translational symmetry in the half-filled three-orbital Hubbard model with antiferromagnetic Hund coupling by means of dynamical mean-field theory (DMFT) and continuous-time quantum Monte Carlo simulations. The stability regions of the antiferro-orbital (AFO), ant...

[Phys. Rev. B 99, 085131] Published Tue Feb 19, 2019

]]>ZrSiS has recently gained attention due to its unusual electronic properties: nearly perfect electron-hole compensation, large, anisotropic magnetoresistance, multiple Dirac nodes near the Fermi level, and an extremely large range of linear dispersion of up to $\sim 2$ eV. We carried out a series of high ...

[Phys. Rev. B 99, 085204] Published Tue Feb 19, 2019

]]>We study the interlayer scattering mediated by long-range Coulomb interaction between electrons (density $n)$ and holes $\left(p\right)$ in a double-layer system. The gated device is made of InAs $\left(e\right)$ and InGaSb $\left(h\right)$ quantum wells separated by a AlSb middle barrier such that the interlayer tunneling is negligibly sm...

[Phys. Rev. B 99, 085307] Published Tue Feb 19, 2019

]]>Electrons in heavy group-IV monolayers, including silicene, germanene, and stanene, have the ability to exhibit rich physics due to the compatibility of the spin and valley degrees of freedom. We propose here that a valley-mediated giant Seebeck magnetoresistance (MR) effect, triggered and controlle...

[Phys. Rev. B 99, 085421] Published Tue Feb 19, 2019

]]>We present a study of the thermal transport in thin single crystals of iron-intercalated titanium disulphide, ${\mathrm{Fe}}_{x}{\mathrm{TiS}}_{2}$, for $0\le x\le 0.20$. We determine the distribution of intercalants using high-resolution crystallographic and magnetic measurements, confirming the insertion of Fe without long-range order...

[Phys. Rev. B 99, 085422] Published Tue Feb 19, 2019

]]>We present the theory of many-body corrections to cyclotron transition energies in graphene in strong magnetic field due to Coulomb interaction, considered in terms of the renormalized Fermi velocity. A particular emphasis is made on the recent experiments where detailed dependencies of this velocit...

[Phys. Rev. B 99, 085423] Published Tue Feb 19, 2019

]]>Key advances in the generation and shaping of spatially structured photonic fields in both the near and far fields render possible the control of the duration, the phase, and the polarization state of the field distributions. For instance, optical vortices having a structured phase are nowadays rout...

[Phys. Rev. B 99, 085425] Published Tue Feb 19, 2019

]]>We present a generic and systematic approach for constructing $D-\text{dimensional}$ lattice models with exactly solvable $d-\text{dimensional}$ boundary states localized to corners, edges, hinges, and surfaces. These solvable models represent a class of “sweet spots” in the space of possible tight-binding models—the...

[Phys. Rev. B 99, 085426] Published Tue Feb 19, 2019

]]>While the Bloch spectrum of translationally invariant noninteracting lattice models is trivially obtained by a Fourier transformation, diagonalizing the same problem in the presence of open boundary conditions is typically only possible numerically or in idealized limits. Here we present exact analy...

[Phys. Rev. B 99, 085427] Published Tue Feb 19, 2019

]]>We present a detailed analysis of the temperature dependence of the interlayer shear mode that reveals a variation of the four-phonon scattering coupling with isotopic mass. Phonon anharmonic decay and isotopic disorder effects are very weak for the low-energy interlayer shear mode, and the overall ...

[Phys. Rev. B 99, 085428] Published Tue Feb 19, 2019

]]>Magnetic frustration and disorder are key ingredients to prevent the onset of magnetic order. In the disordered hexagonal double perovskite ${\mathrm{BaTi}}_{1/2}{\mathrm{Mn}}_{1/2}{\mathrm{O}}_{3}$, ${\mathrm{Mn}}^{4+}$ cations, with $S=3/2$ spins, can either form highly correlated states of magnetic trimers or dimers or remain as weakly interacting orphan sp...

[Phys. Rev. B 99, 054412] Published Fri Feb 15, 2019

]]>We report on the magnetic phase diagram of the distorted kagome-lattice antiferromagnet ${\mathrm{U}}_{3}{\mathrm{Ru}}_{4}{\mathrm{Al}}_{12}$ determined through measurements of magnetic and elastic properties. For field applied along the [100] and [120] axes of the hexagonal crystal structure, we find pronounced anomalies in the magnetization...

[Phys. Rev. B 99, 054413] Published Fri Feb 15, 2019

]]>We propose to realize one-dimensional topological phases protected by $\mathrm{SU}\left(N\right)$ symmetry using alkali or alkaline-earth atoms loaded into a bichromatic optical lattice. We derive a realistic model for this system and investigate it theoretically. Depending on the parity of $N$, two different classes of sy...

[Phys. Rev. B 99, 054414] Published Fri Feb 15, 2019

]]>Recent tunneling conductance measurements of Majorana nanowires show a strong variation in the magnetic-field dependence of the superconducting gap among different devices. Here, we theoretically study the magnetic field dependence of the gap closing feature and establish that the degree of convexit...

[Phys. Rev. B 99, 054507] Published Fri Feb 15, 2019

]]>We theoretically consider a quantum magnetic impurity coupled to a superconductor and obtain the local density of states at the position of the impurity taking into account the effect of spin fluctuations and single-ion magnetic anisotropy. We particularly focus on the spectrum of subgap Yu-Shiba-Ru...

[Phys. Rev. B 99, 054508] Published Fri Feb 15, 2019

]]>${\mathrm{U}}_{2}\mathrm{N}{\mathrm{i}}_{2}\mathrm{Sn}$ is a member of a large family of intermetallic compounds with the tetragonal $\mathrm{M}{\mathrm{o}}_{2}\mathrm{Fe}{\mathrm{B}}_{2}$ crystal structure. It orders antiferromagnetically at 25 K with propagation vector $q=(0,0,{\textstyle \frac{1}{2}})$. Magnetization, magnetoacoustic, and neutron-diffraction experiments on a single crystal provide evidence that th...

[Phys. Rev. B 99, 064415] Published Fri Feb 15, 2019

]]>Magnetic excitations of the recently discovered frustrated spin-1/2 two-leg ladder system ${\mathrm{Li}}_{2}{\mathrm{Cu}}_{2}\mathrm{O}{\left({\mathrm{SO}}_{4}\right)}_{2}$ are investigated using inelastic neutron scattering, magnetic susceptibility, and infrared absorption measurements. Despite the presence of a magnetic dimerization concomitant with the tetragonal-...

[Phys. Rev. B 99, 064416] Published Fri Feb 15, 2019

]]>We theoretically investigate qualitative features of the field-temperature ($H\text{\u2212}T$) phase diagram of superconductors with strong attractive interaction lying in the BCS-BEC crossover regime. Starting with a simple attractive Hubbard model, we estimate three kinds of characteristic fields, i.e., the pai...

[Phys. Rev. B 99, 064508] Published Fri Feb 15, 2019

]]>The solution of complex many-body lattice models can often be found by defining an energy functional of the relevant density of the problem. For instance, in the case of the Hubbard model the spin-resolved site occupation is enough to describe the system's total energy. Similarly to standard density...

[Phys. Rev. B 99, 075132] Published Fri Feb 15, 2019

]]>Using scanning tunneling microscopy, we report the observation of moiré patterns (MPs) on van der Waals heterostructures comprised of various 2D allotropes of bismuth and antimony grown on highly ordered pyrolytic graphite and ${\mathrm{MoS}}_{2}$. The spatial periods of the MPs range from $\lambda \sim 1$ to $\sim 10$ nm. For all th...

[Phys. Rev. B 99, 075422] Published Fri Feb 15, 2019

]]>We study the transport properties of a monolayer transition-metal dichalcogenide (TMDC) ribbon subject to a time-periodic circularly polarized laser field. First, we calculate the quasienergy spectrum within the framework of the Floquet theory and analyze the nontrivial topology of the Floquet bulk ...

[Phys. Rev. B 99, 075423] Published Fri Feb 15, 2019

]]>Fractional Chern insulators (FCIs) realized in fractional quantum Hall systems subject to a periodic potential are topological phases of matter for which space group symmetries play an important role. In particular, lattice dislocations in an FCI can host non-Abelian topological defects, known as ge...

[Phys. Rev. B 99, 081114(R)] Published Fri Feb 15, 2019

]]>Spin-orbit entangled magnetic dipoles, often referred to as pseudospins, provide a new avenue to explore novel magnetism inconceivable in the weak spin-orbit coupling limit, but the nature of their low-energy interactions remains to be understood. We present a comprehensive study of the static magne...

[Phys. Rev. B 99, 085125] Published Fri Feb 15, 2019

]]>In the modern theory of polarization, polarization itself is given by a geometric phase. In calculations for interacting systems the polarization and its variance are obtained from the polarization amplitude. We interpret this quantity as a discretized characteristic function and derive formulas for...

[Phys. Rev. B 99, 085126] Published Fri Feb 15, 2019

]]>We classify time-reversal breaking (class A) spinful topological crystalline insulators with crystallographic nonmagnetic (32 types) and magnetic (58 types) point groups. The classification includes all possible magnetic topological crystalline insulators protected by point group symmetry. Whereas t...

[Phys. Rev. B 99, 085127] Published Fri Feb 15, 2019

]]>Understanding the role of global symmetries and their quantum anomalies in two-dimensional topological order is a challenging problem, especially for time-reversal and mirror-reflection symmetries. Here, the authors develop a new folding approach to mirror-symmetry enriched topological order, which relates this problem to anyon-condensation theory. The approach is physically transparent and easy to compute for some simple, yet important examples. The folding approach can be generalized to study topological order with many other crystalline symmetries and their quantum anomalies.

[Phys. Rev. B 99, 085128] Published Fri Feb 15, 2019

]]>We reveal peculiarities of the trapped (dark) mode excitation in a polarization-insensitive all-dielectric metasurface, whose unit supercell is constructed by particularly arranging four cylindrical dielectric particles. Involving group-theoretical description we discuss in detail the effect of diff...

[Phys. Rev. B 99, 085306] Published Fri Feb 15, 2019

]]>We study theoretically the electron current across a monolayer graphene/hexagonal boron nitride/bilayer graphene tunneling junction in an external magnetic field perpendicular to the layers. We show that change in effective tunneling barrier width for electrons on different graphene layers of bilaye...

[Phys. Rev. B 99, 085420] Published Fri Feb 15, 2019

]]>This paper demonstrates the anisotropic response of quantum critical fluctuations with respect to the direction of the magnetic field $B$ in Ni-doped ${\mathrm{CeCoIn}}_{5}$ by measuring the magnetization $M$ and specific heat $C$. The results show that $M/B$ at $B=0.1\phantom{\rule{4pt}{0ex}}\mathrm{T}$ for both the tetragonal $c$ and $a$ directions exhibits ${T}^{-\mathrm{...}}$

[Phys. Rev. B 99, 054506] Published Thu Feb 14, 2019

]]>Lian *et al.* [Phys. Rev. B **94**, 184310 (2016)] claim that they were able to show evidence of nonthermal characteristics during laser-induced ultrafast melting in silicon by using a time-dependent density functional theory package. In this Comment, we show that their simulated silicon crystal was not e...

[Phys. Rev. B 99, 066301] Published Thu Feb 14, 2019

]]>In the Comment on our original publication [Phys. Rev. B **94**, 184310 (2016)], Zier *et al.* claimed that no melting is observed in real-time time-dependent density functional simulations and there are several inconsistencies in our paper. In this Reply we demonstrate that the “correct” melting behavior...

[Phys. Rev. B 99, 066302] Published Thu Feb 14, 2019

]]>The interplay between topology and interactions on the edge of a two-dimensional topological insulator with time-reversal symmetry is studied. We consider a simple noninteracting system of three helical channels with an inherent ${\mathbb{Z}}_{2}$ topological protection and hence a zero-temperature conductance of $G...$

[Phys. Rev. B 99, 075129] Published Thu Feb 14, 2019

]]>Recently, topological quantum states of non-Hermitian systems, exhibiting rich, new exotic states, have attracted great attention in condensed-matter physics. As for the demonstration, most of non-Hermitian topological phenomena previously focused on are in one- and two-dimensional systems. Here, we...

[Phys. Rev. B 99, 075130] Published Thu Feb 14, 2019

]]>Nodal-line metals and semimetals, as interesting topological states of matter, have been mostly studied in nonmagnetic materials. Here, based on first-principles calculations and symmetry analysis, we predict that fully spin polarized Weyl loops can be realized in the half-metal state of the three-d...

[Phys. Rev. B 99, 075131] Published Thu Feb 14, 2019

]]>Since the discovery of graphene, considerable research efforts have focused on understanding the properties of other two-dimensional materials. Herein, based on *ab initio* many-body calculations, we report the optical properties of monolayer ${\mathrm{SnO}}_{2}$. First, we apply the first-principles density function...

[Phys. Rev. B 99, 075421] Published Thu Feb 14, 2019

]]>[Phys. Rev. B 99, 079904] Published Thu Feb 14, 2019

]]>[Phys. Rev. B 99, 079905] Published Thu Feb 14, 2019

]]>The development of microwave photon detectors is paving the way for a wide range of quantum technologies and fundamental discoveries involving single photons. Here, we investigate the photon emission from a microwave cavity and find that distribution of photon waiting times contains information abou...

[Phys. Rev. B 99, 085418] Published Thu Feb 14, 2019

]]>We develop a robust, nonperturbative approach to study the band structure of artificial graphene. Artificial graphene, as considered here, is generated by imposing a superlattice structure on top of a two-dimensional hole gas in a semiconductor heterostructure, where the hole gas naturally possesses...

[Phys. Rev. B 99, 085419] Published Thu Feb 14, 2019

]]>We study out-of-time ordered correlations $C(x,t)$ and entanglement growth in the random-field XX model with open boundary conditions using the exact Jordan-Wigner transformation to a fermionic Hamiltonian. For any nonzero strength of the random field, this model describes an Anderson insulator. Two s...

[Phys. Rev. B 99, 054205] Published Wed Feb 13, 2019

]]>We show that the low-temperature specific heat $\left({C}_{p}\right)$ of the incommensurate chain-ladder system ${\left\{{\mathrm{CuO}}_{2}\right\}}_{\alpha}\left\{{\mathrm{Sr}}_{2}{\mathrm{Cu}}_{2}{\mathrm{O}}_{3}\right\}={\mathrm{Sr}}_{14}{\mathrm{Cu}}_{24}{\mathrm{O}}_{41}$ (for $\alpha =10/7)$ shows a rather large excess contribution of nonmagnetic origin. Diluted Al doping at the Cu site or annealing the crystal in an ${\mathrm{O}}_{2}$ atmosphere suppresses this featu...

[Phys. Rev. B 99, 054305] Published Wed Feb 13, 2019

]]>The interplay of slight changes of the rare-earth composition and antiferromagnetic ordering of Cr in a series of high purity solid solutions of orthochromites with composition ${\mathrm{Ce}}_{1-x}\mathrm{Eu}{}_{x}{\mathrm{CrO}}_{3}\phantom{\rule{4pt}{0ex}}\left(1\leqq x\leqq 0\right)$ was investigated by neutron and x-ray powder diffraction, magnetization, and heat capacity measurements...

[Phys. Rev. B 99, 054411] Published Wed Feb 13, 2019

]]>Spin-3/2 fermions, displaying a biquadratic band touching in the normal state of pyrochlore iridates, half-Heuslers, HgTe, and gray Sn, become susceptible toward even-parity $d$-wave and odd-parity $p$-wave pairings at finite carrier densities. Here, the authors argue that time-reversal-odd combinations of $d$-wave pairings, producing gapless BdG-Weyl quasiparticles, are energetically favored and yield linear-in-temperature scaling of penetration depth, as observed in YPtBi, due to the effect of impurities. Exotic $d+s$ pairings also appear in the presence of external strain. The authors also show that the surface states of a topological $p$-wave pairing exhibit critical statistics in the presence of disorder, adding to mounting evidence linking topological superconductivity and surface criticality without fine tuning.

[Phys. Rev. B 99, 054505] Published Wed Feb 13, 2019

]]>Skyrmions are small magnetic quasiparticles, which are uniquely characterized by their topological charge and their helicity. In this Rapid Communication, we show via calculations how both properties can be determined without relying on real-space imaging. The orbital magnetization and topological H...

[Phys. Rev. B 99, 060406(R)] Published Wed Feb 13, 2019

]]>Although spin cycloids and helices are quite common, remarkably little is known about the normal modes of a spin cycloid or helix with finite length on a discrete lattice. Based on simple one-dimensional lattice models, we numerically evaluate the normal modes of a spin cycloid or helix produced by ...

[Phys. Rev. B 99, 064414] Published Wed Feb 13, 2019

]]>We consider the superconducting pairing induced by spin-wave exchange in a ferromagnet with both conduction and localized electrons, the latter being described as spins. We use the microscopic Eliashberg theory to describe the pairing of conducting electrons and the random phase approximation approa...

[Phys. Rev. B 99, 064506] Published Wed Feb 13, 2019

]]>We discuss expectation values of the twist operator $U$ appearing in the Lieb-Schultz-Mattis theorem (or the polarization operator for periodic systems) in excited states of the one-dimensional correlated systems ${z}_{L}^{(q,\pm )}\equiv \langle {\mathrm{\Psi}}_{q/2}^{\pm}\left|{U}^{q}\right|{\mathrm{\Psi}}_{q/2}^{\pm}\rangle $, where $|{\mathrm{\Psi}}_{p}^{\pm}\rangle $ denotes the excited states given by linear combinat...

[Phys. Rev. B 99, 075128] Published Wed Feb 13, 2019

]]>In this comparative study we benchmark a recently developed nonadiabatic exchange-correlation potential within time-dependent density-functional theory (TDDFT) [Phys. Rev. Lett. **120**, 157701 (2018)] by (a) validating the transient dynamics using a numerically exact density-matrix renormalization-grou...

[Phys. Rev. B 99, 075417] Published Wed Feb 13, 2019

]]>Machine learning has been successfully applied to identify phases and phase transitions in condensed matter systems. However, quantitative characterization of the critical fluctuations near phase transitions is lacking. In this paper, we propose a finite-size scaling approach based on a convolutiona...

[Phys. Rev. B 99, 075418] Published Wed Feb 13, 2019

]]>Energy relaxation of hot electrons in a conductor can occur by various mechanisms, including electron-phonon and electron-electron interactions. Superconducting tunnel spectroscopy is a powerful tool to study dissipation in mesoscopic and low-dimensional systems. Here, the authors investigate dissipation and heat transport in graphene through superconducting tunnel spectroscopy. This spectroscopic method is used as a local probe of the energy distribution function, yielding the electron temperature and electrochemical potential for different transport regimes.

[Phys. Rev. B 99, 075419] Published Wed Feb 13, 2019

]]>Crossing from the repulsive to the attractive Casimir force is analyzed for two Au and two Si half spaces with boundary Chern-Simons layers. Boundary quantum Hall layers in external magnetic field lead to Casimir repulsion at nanoscales. We discuss features that make systems with boundary quantum Ha...

[Phys. Rev. B 99, 075420] Published Wed Feb 13, 2019

]]>Plasmonic nanoparticles resonantly couple to and confine light below the diffraction limit. This mechanism has enabled a modern renaissance in optical materials, with potential applications ranging from sensing and circuitry to renewable energies and medicines. However, these plasmonic materials are...

[Phys. Rev. B 99, 081112(R)] Published Wed Feb 13, 2019

]]>The scaling physics of quantum Hall transport in optimized topological insulators with a plateau precision of $\sim 1/1000\phantom{\rule{0.16em}{0ex}}{e}^{2}/h$ is considered. Two exponential scaling regimes are observed in temperature-dependent transport dissipation, one of which accords with thermal-activation behavior with a gap of 2....

[Phys. Rev. B 99, 081113(R)] Published Wed Feb 13, 2019

]]>The field of topological materials science has recently been focusing on three-dimensional Dirac semimetals, which exhibit robust Dirac phases in the bulk. However, the absence of characteristic surface states in accidental Dirac semimetals (DSMs) makes it difficult to experimentally verify claims a...

[Phys. Rev. B 99, 085124] Published Wed Feb 13, 2019

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