Latest in cond-mat.str-el

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Hilbert Space Fragmentation and Many-Body LocalizationJun 13 2019Investigating many-body localization (MBL) using exact numerical methods is limited by the exponential growth of the Hilbert space. However, localized eigenstates display multifractality and only extend over a vanishing fraction of the Hilbert space. ... More
Stability of the Laughlin phase against long-range interactionsJun 13 2019A natural, ''perturbative'', problem in the modelization of the fractional quantum Hall effect is to minimize a classical energy functional within a variational set based on Laughlin's wave-function. We prove that, for small enough pair interactions, ... More
Evolution of Pair Correlation Symmetries and Supercurrent Reversal in Tilted Weyl SemimetalsJun 12 2019We study the effective symmetry profiles of superconducting pair correlations and the flow of charge supercurrent in ballistic Weyl semimetal systems with a tilted dispersion relation. Utilizing a microscopic method in the ballistic regime and starting ... More
Universal shift of the fidelity susceptibility peak away from the critical point of the Berezinskii-Kosterlitz-Thouless quantum phase transitionJun 12 2019We argue that the peak which can be observed in fidelity susceptibility around Berezinskii-Kosterlitz-Thouless transition is shifted from the quantum critical point (QCP) at $J_c$ to $J^*$ in the gapped phase by a value $|J^* - J_c| = B^2/36$, where $B^2$ ... More
Order parameter dynamics of the non-linear sigma model in the large $N$ limitJun 12 2019We study non-equilibrium order parameter dynamics of the non-linear sigma model in the large $N$ limit, using Keldysh formalism. We provide a scheme for obtaining stable numerical solution of the Keldysh saddle point equations and use them to study order ... More
Mott quantum criticality in the one-band Hubbard model: Dynamical mean-field theory, power-law spectra, and scalingJun 12 2019Recent studies of electrical transport, both theoretical and experimental, near the bandwidth-tuned Mott metal-insulator transition have uncovered apparent quantum critical scaling of the electrical resistivity at elevated temperatures, despite the fact ... More
Partial Equilibration of the Anti-Pfaffian edge due to Majorana DisorderJun 12 2019We consider electrical and thermal equilibration of the edge modes of the Anti-Pfaffian quantum Hall state at $\nu=5/2$ due to tunneling of the Majorana edge mode to trapped Majorana zero modes in the bulk. Such tunneling breaks translational invariance ... More
Quantum Many-body Scars in a Landau Level on a Thin TorusJun 12 2019We study a kinetically constrained pair hopping model that arises within a Landau level in the quantum Hall effect. At filling $\nu = 1/3$, the model exactly maps onto the so-called ``PXP model", a constrained model for the Rydberg atom chain that is ... More
Orbital Selectivity and Magnetic Ordering in Fe intercalated Dirac Semimetal Bi$_2$Se$_3$Jun 12 2019In this paper we investigate the intercalation effects of Iron (Fe) in the van der Waals gap of Bi$_2$Se$_3$ on the magnetic and transport properties using first-principles band structure estimations combined using dynamical mean-field theory. Inclusion ... More
A first-principles-based study of the thermodynamics of competing low-energy states in correlated materials: Example of cupratesJun 12 2019We demonstrate how first-principles calculations of many competing low-energy states of a correlated material, here a cuprate, can be used to develop a thermodynamic model of Mott and pseudogap transitions in terms of magnetic short-range order. Mott ... More
Entanglement as geometry and flowJun 12 2019We explore the connection between the area law for entanglement and geometry by representing the entanglement entropies corresponding to all $2^N$ bipartitions of an $N$-party pure quantum system by means of a (generalized) adjacency matrix. In the cases ... More
Modified Pade approach for analytic continuation: Application to the zero-gap Kondo lattice modelJun 12 2019A modified Pade approach is presented as analytic continuation for numerical methods that evaluate correlation functions in imaginary time. Instead of the direct analytic continuation of the correlation functions, the Pade method is applied for the self-energy ... More
Adiabatic variation of the charge-density-wave phase diagram in the 123 cuprate (Ca$_x$La$_{1-x}$)(Ba$_{1.75-x}$La$_{0.25+x}$)Cu$_3$O$_y$Jun 12 2019In order to explain the emergence of the anomalous pseudogap state and high-temperature superconductivity in the cuprates, intense research activity over three decades has focused on unravelling the connection between the various instabilities of the ... More
Many-body topological invariants from randomized measurementsJun 12 2019The classification of symmetry-protected topological (SPT) phases in one dimension has been recently achieved, and had a fundamental impact in our understanding of quantum phases in condensed matter physics. In this framework, SPT phases can be identified ... More
Hall Viscosity in a Strongly Coupled Magnetized PlasmaJun 11 2019We show how a Hall viscosity induced by a magnetic field can be generated in strongly coupled theories with a holographic dual. This is achieved by considering parity-breaking higher derivative terms in the gravity dual. These terms couple the Riemann ... More
Cooper pairing of incoherent electrons: an electron-phonon version of the Sachdev-Ye-Kitaev modelJun 11 2019We introduce and solve a model of interacting electrons and phonons that is a natural generalization of the Sachdev-Ye-Kitaev-model and that becomes superconducting at low temperatures. In the normal state two Non-Fermi liquid fixed points with distinct ... More
Wavefunction positivization via automatic differentiationJun 11 2019We introduce a procedure to systematically search for a local unitary transformation that maps a wavefunction with a non-trivial sign structure into a positive-real form. The transformation is parametrized as a quantum circuit compiled into a set of one ... More
Topology and Edge Mode Physics at Quantum Criticality for Correlated Quantum MatterJun 11 2019We study the topology and edge mode physics at quantum criticality for correlated quantum matter which was introduced in Nature Physics 1.1, 53(2005). Our model Hamiltonian belongs to BDI symmetry class with short range and long range interactions. We ... More
Disorder-Induced Electronic NematicityJun 11 2019We expose the theoretical mechanisms underlying disorder-induced nematicity in systems exhibiting strong fluctuations or ordering in the nematic channel. Our analysis consists of a symmetry-based Ginzburg-Landau approach and associated microscopic calculations. ... More
A Study of Berry Connection and Complex Analysis for Topological CharacterizationJun 11 2019We study and present the results of Berry connection for the topological states in quantum matter. The Berry connection plays a central role in the geometric phase and topological phenomenon in quantum many-body system. We present the necessary and sufficient ... More
Intrinsic persistent spin helix state in two-dimensional group-IV monochalcogenide MX (M : Sn, Ge; X: S, Se, Te) monolayerJun 11 2019Energy-saving spintronic is believed to be implementable on a systems hosting persistent spin helix (PSH) state since they support an extraordinarily long spin lifetime of carriers. However, achieving the PSH state requires a unidirectional spin configuration ... More
Residual Entropy and Spin Fractionalizations in the Mixed-Spin Kitaev ModelJun 11 2019We investigate ground-state and finite temperature properties of the mixed-spin $(s, S)$ Kitaev model. When one of spins is half-integer and the other is integer, we introduce two kinds of local symmetries, which results in a macroscopic degeneracy in ... More
The structure of chaotic eigenstates and their entanglement entropyJun 10 2019We consider a chaotic many-body system that is split into two subsystems, with an interaction along their mutual boundary, and study the entanglement properties of an energy eigenstate with nonzero energy density. When the two subsystems have nearly equal ... More
Applying the tempered Lefschetz thimble method to the Hubbard model away from half-fillingJun 10 2019The tempered Lefschetz thimble method [arXiv:1703.00861] is a parallel-tempering algorithm to solve the sign problem in Monte Carlo simulations. It uses the flow time of the antiholomorphic gradient flow as a tempering parameter and is expected to tame ... More
Phase diagram of Rydberg-dressed Fermi gas in two dimensionsJun 10 2019Rydberg-dressed ultracold Fermi gas is one of the latest quantum many-body systems where the sign, strength, and range of the interaction can be controlled experimentally. The interaction in momentum space has a negative minimum at $q_c$ inversely proportional ... More
Magic entanglement renormalization for quantum fieldsJun 10 2019Continuous tensor networks are variational wavefunctions proposed in recent years to efficiently simulate quantum field theories (QFTs). Prominent examples include the continuous matrix product state (cMPS) and the continuous multi-scale entanglement ... More
Twisted and untwisted negativity spectrum of free fermionsJun 10 2019A basic diagnostic of entanglement in mixed quantum states is known as the positive partial transpose (PT) criterion. Such criterion is based on the observation that the spectrum of the partially transposed density matrix of an entangled state contains ... More
Néel and stripe ordering from spin-orbital entanglement in $α$-Sr$_2$CrO$_4$Jun 10 2019The rich phenomenology engendered by the coupling between the spin and orbital degrees of freedom has become appreciated as a key feature of many strongly-correlated electron systems. The resulting emergent physics is particularly prominent in a number ... More
Disentangling the Generalized Double Semion ModelJun 10 2019We analyze the class of Generalized Double Semion (GDS) models in arbitrary dimensions from the point of view of lattice Hamiltonians. We show that on a $d$-dimensional spatial manifold $M$ the dual of the GDS is equivalent, up to constant depth local ... More
Universal driving protocol for symmetry-protected Floquet topological phasesJun 10 2019Universal driving protocol for symmetry-protected Floquet topological phasesWe propose a universal driving protocol for the realization of symmetry-protected topological phases in $2+1$ dimensional Floquet systems. Our proposal is based on the theoretical ... More
Loop update for infinite projected entangled-pair states in two spatial dimensionsJun 10 2019We propose an improved approach to carry out the imaginary time evolution of infinite projected entangled-pair states (iPEPS), especially for systems with criticality. A cyclic optimal truncation is introduced to update the tensors along a closed loop, ... More
Strongly correlated electrons: Analytic mean-field theories with two-particle self-consistencyJun 10 2019A two-particle self-consistency is rarely part of mean-field theories. It is, however, essential for avoiding spurious critical transitions and unphysical behavior. We present a general scheme for constructing analytically controllable approximations ... More
Coupled Cluster as an impurity solver for Green's function embedding methodsJun 10 2019We investigate the performance of Green's function coupled cluster singles and doubles (CCSD) method as a solver for Green's function embedding methods. To develop an efficient CC solver, we construct the one-particle Green's function from the coupled ... More
Electron Bubbles and the Structure of the Orbital WavefunctionJun 10 2019Stripe-like and bubble-like patterns spontaneously form in numerous physical, chemical, and biological systems when competing long-range and short-range interactions banish uniformity. Stripe-like and the related nematic morphology are also under intense ... More
Plasmon localization and relaxation, and thermal transport in one-dimensional conductorsJun 10 2019We study the localization and decay properties as well as the thermal conductance of one-dimensional plasmons. Our model contains a Luttinger-liquid part with spatially random plasmon velocity and interaction parameter as well as a nonlinearity that is ... More
Site-resolved hyperfine and lattice dynamical properties of a single-crystal Fe3SiJun 10 2019A single-crystal sample of a DO3-ordered Fe3Si compound was studied by means of the 57Fe M\"ossbauer spectroscopy. Spectra have been recorded in a transmission geometry in the temperature range between 5 and 850 K. They have been analyzed either in terms ... More
Novel criticality of Dirac fermions from lattice symmetry breakingJun 10 2019We consider the role of spontaneous lattice symmetry breaking in strongly interacting two dimensional Dirac systems. The fermion induced quantum (multi-)criticality is described by Dirac fermions coupled to a dynamical order parameter that is composed ... More
Trimer classical spin liquid from interacting fractional chargesJun 10 2019We study a problem of interacting fractional charges with $J_1$-$J_2$-$J_3$ Ising model on a checkerboard lattice under magnetic field. As a result of the interplay between repulsive interactions and particle density tuning by magnetic field, the fractional ... More
Quantum supremacy with analog quantum processors for material science and machine learningJun 10 2019Quantum supremacy is the ability of quantum processors to outperform classical computers at certain tasks. In digital random quantum circuit approaches for supremacy, the output distribution produced is described by the Porter-Thomas (PT) distribution. ... More
Fidelity as a probe for deconfined quantum critical pointJun 10 2019Deconfined quantum critical point was proposed as a second-order quantum phase transition between two broken symmetry phases beyond the Landau-Ginzburg-Wilson paradigm. However, numerical studies cannot completely rule out a weakly first-order transition ... More
Formation of spiral ordering by magnetic field in frustrated anisotropic antiferromagnetsJun 10 2019We discuss theoretically phase transitions in frustrated antiferromagnets with biaxial anisotropy or dipolar forces in magnetic field applied along the easy axis at $T=0$. There are well-known sequences of phase transitions upon the field increasing: ... More
Cumulants and Scaling Functions of Infinite Matrix Product StatesJun 10 2019The order parameter cumulants of infinite matrix product ground states are evaluated across a quantum phase transition. A scheme using the Binder cumulant, finite-entanglement scaling and scaling functions to obtain the critical point and exponents of ... More
Direct Imaging Revealing Halved Ferromagnetism in Tensile-Strained LaCoO3 Thin FilmsJun 10 2019The enigma of the emergent ferromagnetic state in tensile-strained LaCoO3 thin films remains to be explored because of the lack of a well agreed explanation. The direct magnetic imaging technique using a low-temperature magnetic force microscope (MFM) ... More
Anomalous electron transport in epitaxial NdNiO$_3$ filmsJun 10 2019The origin of simultaneous electronic, structural and magnetic transitions in bulk rare-earth nickelates ($RE$NiO$_3$) remains puzzling with multiple conflicting reports on the nature of these entangled phase transitions. Heterostructure engineering of ... More
Successive Symmetry Breaking in a Jeff = 3/2 Quartet in the Spin-Orbit Coupled Insulator Ba2MgReO6Jun 10 2019We report on the cubic double perovskite Ba2MgReO6 containing Re6+ ions with the 5d1 electron configuration. Resistivity, magnetization, and heat capacity measurements using single crystals show that the compound is a Mott insulator with a magnetic transition ... More
Low-energy dynamics of the Affleck-Kennedy-Lieb-Tasaki model in the one- and two-triplon basisJun 10 2019The elementary excitation in the antiferromagnetic spin-1 model known as the Affleck-Kennedy-Lieb-Tasaki (AKLT) Hamiltonian has been described alternatively as magnons or kink-like solitons (triplons). The latter, which we call the triplon throughout ... More
Pfaffian formalism for higher-order topological insulatorsJun 09 2019We generalize the Pfaffian formalism, which has been playing an important role in the study of time-reversal invariant topological insulators (TIs), to 3D chiral higher-order topological insulators (HOTIs) protected by the product of four-fold rotational ... More
Spin dynamics and unconventional magnetism in insulating La$_{(1-2x)}$Sr$_{2x}$Co$_{(1-x)}$Nb$_{x}$O$_3$Jun 09 2019We study the structural, magnetic, transport and electronic properties of LaCoO$_3$ with Sr/Nb co-substitution, i.e., La$_{(1-2x)}$Sr$_{2x}$Co$_{(1-x)}$Nb$_{x}$O$_3$ using x-ray and neutron diffraction, dc and ac-magnetization, neutron depolarization, ... More
Magnetic Raman continuum in single crystalline H$_3$LiIr$_2$O$_6$Jun 09 2019Recently H$_3$LiIr$_2$O$_6$ has been reported as a spin-orbital entangled quantum spin liquid (QSL) [K. Kitagawa et al., Nature {\bf 554}, 341 (2018)], albeit its connection to Kitaev QSL has not been yet identified. To unveil the related Kitaev physics, ... More
Logarithmic entanglement growth in two-dimensional disordered fermionic systemsJun 08 2019We investigate the growth of the entanglement entropy $S_{\textrm{ent}}$ following global quenches in two-dimensional free fermion models with potential and bond disorder. For the potential disorder case we show that an intermediate weak localization ... More
Quantum impurity models from conformal field theoryJun 08 2019The coupling between localized magnetic moments and itinerant electrons presents a plethora of interesting physics. The low-energy physics of some quantum impurity systems can be described using conformal field theory (CFT). In this paper, the connection ... More
Possible emergence of a skyrmion phase in ferroelectric GaMo$_4$S$_8$Jun 08 2019Polar lacunar spinels, such as GaV$_4$S$_8$ and GaV$_4$Se$_8$, were proposed to host skyrmion phases under magnetic field. In this work, we put forward, as a candidate for N\'eel-type skyrmion lattice, the isostructural GaMo$_4$S$_8$, here systematically ... More
Bayesian parametric analytic continuation of Green's functionsJun 08 2019Bayesian parametric analytic continuation (BPAC) is proposed for the analytic continuation of noisy imaginary-time Green's function data, as e.g. obtained by continuous-time quantum Monte Carlo simulations (CTQMC). Within BPAC, the spectral function is ... More
Nature of the magnetism of iridium in the double perovskite Sr2CoIrO6Jun 07 2019We report on our investigation on the magnetism of the iridate double perovskite Sr$_2$CoIrO$_6$, a nominally Ir$^{5+}$ Van Vleck $J_{eff}=0$ system. Using x-ray absorption (XAS) and x-ray magnetic circular dichroism (XMCD) spectroscopy at the Ir-$L_{2,3}$ ... More
The chiral SYK modelJun 07 2019We study the generalization of the Sachdev-Ye-Kitaev (SYK) model to a $1+1$ dimensional chiral SYK model of $N$ flavors of right-moving chiral Majorana fermions with all-to-all random 4-fermion interactions. The interactions in this model are exactly ... More
Theory of a Planckian metalJun 07 2019We present a lattice model of fermions with $N$ flavors and random interactions which describes a Planckian metal at low temperatures, $T \rightarrow 0$, in the solvable limit of large $N$. We begin with quasiparticles around a Fermi surface with effective ... More
Pairing in twisted double-bilayer graphene and related moiré superlattice systemsJun 07 2019We present a systematic classification and analysis of possible pairing instabilities in graphene-based moir\'e superlattices. Motivated by recent experiments on twisted double-bilayer graphene showing signs of triplet superconductivity, we analyze both ... More
Resonant Inelastic X-Ray Scattering in Metals: A Diagrammatic ApproachJun 07 2019We develop a formalism to study the Resonant Inelastic X-ray Scattering (RIXS) response in metals based on the diagrammatic expansion for its cross section. The standard approach to the solution of the RIXS problem relies on two key approximations: short-range ... More
Resistivity near a nematic quantum critical point: impact of acoustic phononsJun 07 2019We revisit the issue of the resistivity of a two-dimensional electronic system tuned to a nematic quantum critical point (QCP), focusing on the non-trivial impact of the coupling to the acoustic phonons. Due to the unavoidable linear coupling between ... More
Quantization of Hydrodynamics: Rotating Superfluid and Gravitational AnomalyJun 07 2019We present a consistent scheme of quantization of chiral flows (flows with extensive vorticity) in ideal hydrodynamics in two dimensions. Chiral flows occur in rotating superfluid, rotating turbulence and also in electronic systems in the magnetic field ... More
Anisotropy-temperature phase diagram for the two-dimensional dipolar Heisenberg model with and without magnetic fieldJun 07 2019We investigate phase transitions in the two-dimensional dipolar Heisenberg model with uniaxial anisotropy with a specific ratio between the exchange and dipolar constants, $\delta=1$. We obtain the $\eta$--$T$ (anisotropy vs. temperature) phase diagrams ... More
Classification and Construction of Topological Phases of Quantum MatterJun 07 2019We develop a theoretical framework for the classification and construction of symmetry protected topological (SPT) phases, which are a special class of zero-temperature phases of strongly interacting gapped quantum many-body systems that exhibit topological ... More
Interaction-dependent anisotropy of fractional quantum Hall statesJun 06 2019A fractional quantum Hall (FQH) system with broken rotational symmetry exploits its geometric degree of freedom to minimize its ground state energy. The mass anisotropy of bare particles interacting isotropically is partially inherited by the many-body ... More
Signature of Quantum Entanglement in NH4CuPO4.H2OJun 06 2019Entangled solid state systems have gained a great deal of attention due to their fruitful applications in modern quantum technologies. Herein, detection of entanglement content from experimental magnetic susceptibility and specific heat data is reported ... More
Fractional disclination charge in two-dimensional $C_n-$symmetric topological crystalline insulatorsJun 06 2019Robust fractional charge localized at disclination defects has been recently found as a topological response in $C_{6}$ symmetric 2D topological crystalline insulators (TCIs). In this article, we thoroughly investigate the fractional charge on disclinations ... More
Quantum Approximate Optimization with a Trapped-Ion Quantum SimulatorJun 06 2019Quantum computers and simulators may offer significant advantages over their classical counterparts, providing insights into quantum many-body systems and possibly solving exponentially hard problems, such as optimization and satisfiability. Here we report ... More
Variational Generation of Thermofield Double States and Critical Ground States with a Quantum ComputerJun 06 2019Finite-temperature phases of many-body quantum systems are fundamental to phenomena ranging from condensed-matter physics to cosmology, yet they are generally difficult to simulate. Using an ion trap quantum computer and protocols motivated by the Quantum ... More
Resummation for the Field-theoretical Derivation of the Negative MagnetoresistanceJun 06 2019We show detailed derivation of the electric conductivity of quark matter at finite temperature and density under a magnetic field. We especially focus on the longitudinal electric conductivity along the magnetic direction and establish the field-theoretical ... More
Quantum quench in PT-symmetric Luttinger liquidJun 06 2019A Luttinger liquid (LL) describes low energy excitations of many interacting 1D systems, and exhibits universal behaviour both in and out of equilibrium. We analyze its behaviour in the non-hermitian realm after quantum quenching to a PT-symmetric LL ... More
Complete optical valley polarization in Weyl semimetals in strong magnetic fieldsJun 06 2019We present a theory of an optically induced valley polarization in an interacting, time-reversal symmetric Weyl semimetal placed under strong magnetic fields. Because the application of a magnetic field reduces the symmetry of the crystal, the optical ... More
Scanning Tunneling Shot Noise Spectroscopy in Kondo SystemsJun 06 2019Using a large-N theory in combination with the Keldysh non-equilibrium Greens function formalism, we investigate the current, differential conductance, zero-frequency shot-noise and Fano factor as measured by scanning tunneling shot noise spectroscopy ... More
Role of the exchange-correlation functional on the structural, electronic and optical properties of cubic and tetragonal SrTiO$_3$ including many-body effectsJun 06 2019SrTiO$_3$ is a model perovskite compound with unique properties and technological relevance. At 105 K it undergoes a transition from a cubic to a tetragonal phase with characteristic antiferrodistortive rotations of the TiO$_6$ octahedra. Here we study ... More
Required number of states increases only moderately with the problem size for antisymmetrized geminal powersJun 06 2019We propose an algorithm to obtain the ground-state energy of a many-electron system using the variational wave function of a linear combination of antisymmetrized geminal powers. We optimized this algorithm to obtain the energy and the other parameters ... More
A holographic superconductor forced through interactionsJun 06 2019We propose a novel mechanism to achieve superconductivity at zero chemical potential, within the holographic framework. Extending previous construction of the holographic superconductors, we consider an Einstein-Maxwell system coupled with two interacting ... More
Orbital-selective Kondo entanglement and antiferromagnetic order in USb$_2$Jun 06 2019In heavy-fermion compounds, the dual character of $f$ electrons underlies their rich and often exotic properties like fragile heavy quasipartilces, variety of magnetic orders and unconventional superconductivity. 5$f$-electron actinide materials provide ... More
Easing the Monte Carlo sign problemJun 05 2019Quantum Monte Carlo (QMC) methods are the gold standard for studying equilibrium properties of quantum many-body systems -- their phase transitions, their ground and thermal state properties. However, in many interesting situations QMC methods are faced ... More
Hyperbolic Fracton Model, Subsystem Symmetry, and Holography II: The Dual Eight-Vertex ModelJun 05 2019The discovery of fracton states of matter opens up an exciting, largely unexplored field of many-body physics. Certain fracton states' similarity to gravity is an intriguing property. In an earlier work [H. Yan, Phys. Rev. B 99, 155126 (2019)], we have ... More
Reaching the continuum limit in finite-temperature ab initio field-theory computations in many-fermion systemsJun 05 2019Finite-temperature, grand-canonical computations based on field theory are widely applied in areas including condensed matter physics, ultracold atomic gas systems, and lattice gauge theory. However, these calculations have computational costs scaling ... More
Exceptional points and the topology of quantum many-body spectraJun 05 2019We show that in a generic, ergodic quantum many-body system the interactions induce a non-trivial topology for an arbitrarily small non-hermitean component of the Hamiltonian. This is due to an exponential-in-system-size proliferation of exceptional points ... More
Tensor network simulation of the Kitaev-Heisenberg model at finite temperatureJun 05 2019We investigate the Kitaev-Heisenberg (KH) model at finite temperature using the exact environment full update (eeFU), introduced in Phys. Rev. B 99, 035115 (2019), which represents purification of a thermal density matrix on an infinite hexagonal lattice ... More
Noncollinear Antiferromagnetic Order and Effect of Spin-Orbit Coupling in Spin-1 Honeycomb LatticeJun 05 2019Effective pseudospin-1/2 honeycomb lattice materials such as Li2IrO3, Na2IrO3 and $\alpha$-RuCl3 have received much attention due to the presence of bond-dependent spin interactions such as in Kitaev's compass model. By comparison, spin-1 materials have ... More
Dirac fermions and flat bands in the ideal kagome metal FeSnJun 05 2019The kagome lattice based on 3d transition metals is a versatile platform for novel topological phases hosting symmetry-protected electronic excitations and exotic magnetic ground states. However, the paradigmatic states of the idealized two-dimensional ... More
Three dimensional scattering within Quasiparticle Interference measurements of FeSeJun 05 2019Quasiparticle Interference (QPI) provides a wealth of information relating to the electronic structure of a material. However, it is often assumed that this information is limited to two-dimensional electronic states. Here, we provide direct evidence ... More
Singlet Reservoir Theory of Ambient Tc Granular Superconductivity in Monovalent Metal NanostructuresJun 05 2019Monovalent metals contain half filled band (HFB) of s-electrons. Emphasizing importance of Coulomb repulsions in HFB in 2D and 1D monovalent systems we sketched a theory (2018) for ambient temperature granular superconductivity reported by Thapa and Pandey ... More
Anisotropic Tensor Renormalization GroupJun 05 2019We propose a new tensor renormalization group algorithm, Anisotropic Tensor Renormalization Group (ATRG), for lattice models in arbitrary dimensions. The proposed method shares the same versatility with the Higher-Order Tensor Renormalization Group (HOTRG) ... More
Braiding properties of paired spin-singlet and non-abelian hierarchy statesJun 05 2019We study explicit model wave functions describing the fundamental quasiholes in a class of non-abelian fractional quantum Hall states. This class is a family of paired spin-singlet states with $n\geq1$ internal degrees of freedom. We determine the braid ... More
Screening and the Pinch Point Paradox in Spin IceJun 05 2019A pinch point singularity in the structure factor characterizes an important class of condensed matter that is a counterpoint to the paradigm of broken symmetry. This class includes water ice, charge ice and spin ice. Of these, dipolar spin ice affords ... More
Orbital-selective Kondo-lattice and enigmatic f-electrons emerging from inside the antiferromagnetic phase of a heavy fermionJun 04 2019Novel electronic phenomena frequently form in heavy fermions as a consequence of the mutual nature of localization and itineracy of f electrons. On the magnetically ordered side of the heavy fermion phase diagram, f moments are expected to be localized ... More
Magnetic field-tuned quantum criticality in a Kondo insulatorJun 04 2019Kondo insulators are predicted to undergo an insulator-to-metal transition under applied magnetic field, yet the extremely high fields required to date have prohibited a comprehensive investigation of the nature of this transition. Here we show that Ce3Bi4Pd3 ... More
Theory of the giant thermal Hall effect in the high temperature superconductorsJun 04 2019Recent transport measurement finds giant negative thermal Hall signal in the pseudo-gap phase of the high temperature superconductors\cite{Taillefer}. Such a signal is found to increase in magnitude with decreasing doping and to reach its maximum in the ... More
Topological bulk currents in topological insulatorsJun 04 2019We provide evidence that, alongside symmetry protected edge states, topological phases also support bulk currents. These currents are activated by local potential gradients even if they do not cause a phase transition. To understand their origin one can ... More
Modeling the pseudogap metallic state in Cuprates: quantum disordered pair density wave and hidden bosonic Mott insulatorJun 04 2019We present a way to quantum-disorder a pair density wave, and propose it to be a candidate of the effective low-energy description of the pseudogap metal which may reveal itself in a sufficiently high magnetic field to suppress the d-wave pairing. The ... More
Generalized hydrodynamics with space-time inhomogeneous interactionsJun 04 2019We provide a new hydrodynamic framework to describe out-of-equilibrium integrable systems with space-time inhomogeneous interactions. Our result builds up on the recently-introduced Generalized Hydrodynamics (GHD). The method allows to analytically describe ... More
Spectroscopy of spinons in Coulomb quantum spin liquidsJun 04 2019We calculate the effect of the emergent photon on threshold production of spinons in $U(1)$ Coulomb spin liquids such as quantum spin ice. The emergent Coulomb interaction modifies the threshold production cross-section dramatically, changing the weak ... More
Torque equilibrium spin wave theory study of anisotropy and Dzyaloshinskii-Moriya interaction effects on the indirect K$-$ edge RIXS spectra of a triangular lattice antiferromagnetJun 04 2019We apply the recently formulated torque equilibrium spin wave theory (TESWT) to compute the $1/S$-order interacting $K$ -edge bimagnon resonant inelastic x-ray scattering (RIXS) spectra of an anisotropic triangular lattice antiferromagnet with Dzyaloshinskii-Moriya ... More
Torque equilibrium spin wave theory study of anisotropy and Dzyaloshinskii-Moriya interaction effects on the indirect K$-$ edge RIXS spectrum of a triangular lattice antiferromagnetJun 04 2019Jun 13 2019We apply the recently formulated torque equilibrium spin wave theory (TESWT) to compute the $1/S$-order interacting $K$ -edge bimagnon resonant inelastic x-ray scattering (RIXS) spectra of an anisotropic triangular lattice antiferromagnet with Dzyaloshinskii-Moriya ... More
Photoinduced hidden CDW state and relaxation dynamics of 1T-TaS_2 probed by time-resolved terahertz spectroscopyJun 04 2019The dynamical properties of single crystal 1T-TaS$_{2}$ are investigated both in commensurate charge density wave state (CCDW state) and hidden charge density wave state (HCDW state). We develop a useful criterion in time-domain transmission terahertz ... More
Quaternary Jordan-Wigner mapping and extended-kink phase in the interacting Kitaev ringJun 04 2019On a ring, a single Jordan-Wigner transformation between the Kitaev model and the spin model suffers redundant degrees of freedom. Instead, there holds a perfect quaternary Jordan-Wigner mapping involving two Kitaev rings and two spin rings with periodic ... More
Novel attractive pairing interaction in strongly correlated superconductorsJun 04 2019Conventional and unconventional superconductivity, respectively, arise from attractive (electron-phonon) and repulsive (many-body Coulomb) interactions with fixed-sign and sign-reversal pairing symmetries. Although heavy-fermions, cuprates, and pnictides ... More
125Te-NMR Study on a Single Crystal of Heavy Fermion Superconductor UTe2Jun 04 2019We report 125Te-NMR studies on a newly discovered heavy fermion superconductor UTe2. Using a single crystal, we have measured the 125Te-NMR Knight shift K and spin-lattice relaxation rate 1/T1 for fields along the three orthorhombic crystal axes. The ... More