text stringlengths 89 2.49k | category stringclasses 19
values |
|---|---|
Combined effects of local and nonlocal hybridization on formation and
condensation of excitons in the extended Falicov-Kimball model: We study the combined effects of local and nonlocal hybridization on the
formation and condensation of the excitonic bound states in the extended
Falicov-Kimball model by the density-m... | cond-mat_str-el |
Universal scaling of Klein bottle entropy near conformal critical points: We show that the Klein bottle entropy [Phys. Rev. Lett. 119, 261603 (2017)]
for conformal field theories (CFTs) perturbed by a relevant operator is a
universal function of the dimensionless coupling constant. The universal
scaling of the Klein bo... | cond-mat_str-el |
Quantum phases of a frustrated four-leg spin tube: We study the ground state phase diagram of a frustrated spin-1/2 four-leg
tube. Using a variety of complementary techniques, namely density matrix
renormalization group, exact diagonalization, Schwinger boson mean field
theory, quantum Monte-Carlo and series expansion,... | cond-mat_str-el |
Exchange renormalized crystal field excitation in a quantum Ising magnet
KTmSe$_2$: Rare-earth delafossite compounds, ARCh$_2$ (A = alkali or monovalent ion, R =
rare earth, Ch = chalcogen), have been proposed for a range of novel quantum
phenomena. Particularly, the Tm series, ATmCh$_2$, featuring Tm ions on a
trian... | cond-mat_str-el |
Elementary excitations in the ordered phase of spin-1/2 J1-J2 model on
square lattice: We use recently proposed four-spin bond-operator technique (BOT) to discuss
spectral properties of frustrated spin-$\frac12$ $J_1$--$J_2$ Heisenberg
antiferromagnet on square lattice at $J_2<0.4J_1$ (i.e., in the N\'eel ordered
pha... | cond-mat_str-el |
Interplay of disorder and spin fluctuations in the resistivity near a
quantum critical point: The resistivity in metals near an antiferromagnetic quantum critical point
(QCP) is strongly affected by small amounts of disorder. In a quasi-classical
treatment, we show that an interplay of strongly anisotropic scattering... | cond-mat_str-el |
Specific Heat Study of Magnetic and Superconducting Transitions in
CePt3Si: Measurements of specific heat between 80 mK to 4 K and electrical resistivity
between 80 mK to 10 K were carried out for polycrystalline CePt3Si samples cut
into small pieces (typically $\sim $10 mg). In the specific heat measurements,
we obs... | cond-mat_str-el |
Electronic structure of RE1-xAxMnO3 manganite films investigated by
magnetic circular dichroism spectroscopy: Magnetic circular dichroism (MCD) spectroscopy was used to study the features
of the electronic structure of an epitaxial La0.7Ca0.3MnO3 film in the range of
1.2 - 4 eV. The study of the temperature behavior ... | cond-mat_str-el |
Tomonaga-Luttinger Liquid in a Quasi-One-Dimensional S=1 Antiferromagnet
Observed by the Specific Heat: Specific heat experiments on single crystals of the S=1 quasi-one-dimensional
bond-alternating antiferromagnet Ni(C_9H_24N_4)(NO_2)ClO_4, alias NTENP, have
been performed in magnetic fields applied both parallel an... | cond-mat_str-el |
Low-energy scales and temperature-dependent photoemission of heavy
fermions: We solve the $S=1/2$ Kondo lattice model within the dynamical mean field
theory. Detailed predictions are made for the dependence of the lattice Kondo
resonance and the conduction electron spectral density on temperature and band
filling $n_... | cond-mat_str-el |
Critical properties of S=1/2 Heisenberg ladders in magnetic fields: The critical properties of the $S=1/2$ Heisenberg two-leg ladders are
investigated in a magnetic field. Combining the exact diagonalization method
and the finite-size-scaling analysis based on conformal field theory, we
calculate the critical exponents... | cond-mat_str-el |
Quantum walk versus classical wave: Distinguishing ground states of
quantum magnets by spacetime dynamics: We investigate the wavepacket spreading after a single spin flip in
prototypical two-dimensional ferromagnetic and antiferromagnetic quantum spin
systems. We find characteristic spatial magnon density profiles: ... | cond-mat_str-el |
Vertical Boundary at x ~ 0.11 in the Structural Phase Diagram of the
La1-xSrxMnO3 System (0.08 <= x <= 0.125): The structural phase diagram of the La1-xSrxMnO3 system in the compositional
range 0.08 <= x <= 0.125 has been investigated by high-resolution synchrotron
x-ray powder diffraction techniques between 20-600 K... | cond-mat_str-el |
Spin polarization of strongly interacting 2D electrons: the role of
disorder: In high-mobility silicon MOSFET's, the $g^*m^*$ inferred indirectly from
magnetoconductance and magnetoresistance measurements with the assumption that
$g^*\mu_BH_s=2E_F$ are in surprisingly good agreement with $g^*m^*$ obtained by
direct m... | cond-mat_str-el |
Path-integral Monte Carlo study of electronic states in quantum dots in
an external magnetic field: We explore correlated electron states in harmonically confined few-electron
quantum dots in an external magnetic field by the path-integral Monte Carlo
method for a wide range of the field and the Coulomb interaction s... | cond-mat_str-el |
P-wave pairing and ferromagnetism in the metal-insulator transition in
two dimensions: Based on recent experimental evidence for a spin polarized ground state in
the insulating phase of the two-dimensional electron system, we propose that
ferromagnetic spin fluctuations lead to an attractive interaction in the
triple... | cond-mat_str-el |
Origin of Biquadratic Exchange Interactions in a Mott Insulator as a
Driving Force of Spin Nematic Order: We consider a series of Mott insulators in unit of two orbitals each hosting
spin-1/2 electron, and by pairing two spin-1/2 into spin-1 triplet, derive the
effective exchange interaction between the adjacent unit... | cond-mat_str-el |
Tunable Weyl Semi-metal and its Possible Realization in Optical Lattice: Weyl semimetal (WSM) is an exotic topological state in condensed matter
physics. In this paper, based on a two-band cubic lattice model, we studied
WSMs with a pair of tunable Weyl nodes. It is pointed out that there exist
three types of WSMs with... | cond-mat_str-el |
Quench Dynamics Across Topological Quantum Phase Transitions: We study the dynamics of systems quenched through topological quantum phase
transitions and investigate the behavior of the bulk and edge excitations with
various quench rates. Specifically, we consider the Haldane model and
checkerboard model in slow quench... | cond-mat_str-el |
In pursuit of deconfined quantum criticality in Ising gauge theory
entangled with single-component fermions: We highlight exotic quantum criticality of quasi-two-dimensional
single-component fermions at half-filling that are minimally coupled to a
dynamical Ising gauge theory. With the numerical matrix product state ... | cond-mat_str-el |
Unconventional superconductivity in the layered iron germanide
YFe$_2$Ge$_2$: Since the discovery of superconductivity in LaFePO in 2006, numerous
iron-based superconductors have been identified within diverse structure
families, all of which combine iron with a group-V (pnictogen) or group-VI
(chalco- gen) element. ... | cond-mat_str-el |
Single-crystal investigations on the multiferroic material
LiFe(WO$_4$)$_2$: The crystal and magnetic structure of multiferroic LiFe(WO$_4$)$_2$ were
investigated by temperature and magnetic-field dependent specific heat,
susceptibility and neutron diffraction experiments on single crystals.
Considering only the two ... | cond-mat_str-el |
Nonequilibrium self-energy functional approach to the dynamical Mott
transition: The real-time dynamics of the Fermi-Hubbard model, driven out of equilibrium
by quenching or ramping the interaction parameter, is studied within the
framework of the nonequilibrium self-energy functional theory. A dynamical
impurity app... | cond-mat_str-el |
Cluster Monte Carlo Algorithm for the Quantum Rotor Model: We propose a highly efficient "worm" like cluster Monte Carlo algorithm for
the quantum rotor model in the link-current representation. We explicitly prove
detailed balance for the new algorithm even in the presence of disorder. For
the pure quantum rotor model... | cond-mat_str-el |
Generalized Lifshitz-Kosevich scaling at quantum criticality from the
holographic correspondence: We characterize quantum oscillations in the magnetic susceptibility of a
quantum critical non-Fermi liquid. The computation is performed in a strongly
interacting regime using the nonperturbative holographic corresponden... | cond-mat_str-el |
Single hole dynamics in the t-J model on a square lattice: We present quantum Monte Carlo (QMC) simulations for a single hole in a t-J
model from J=0.4t to J=4t on square lattices with up to 24 x 24 sites. The
lower edge of the spectrum is directly extracted from the imaginary time
Green's function. In agreement with e... | cond-mat_str-el |
Parametric pumping and kinetics of magnons in dipolar ferromagnets: The time evolution of magnons subject to a time-dependent microwave field is
usually described within the so-called "S-theory", where kinetic equations for
the distribution function are obtained within the time-dependent Hartree-Fock
approximation. To ... | cond-mat_str-el |
Enhanced skyrmion metastability under applied strain in FeGe: Mechanical straining of skyrmion hosting materials has previously
demonstrated increased phase stability through the expansion of the skyrmion
equilibrium pocket. Additionally, metastable skyrmions can be generated via
rapid field-cooling to form significant... | cond-mat_str-el |
Shubnikov-de Haas oscillations spectrum of the strongly correlated
quasi-2D organic metal (ET)8[Hg4Cl12(C6H5Br)]2 under pressure: Pressure dependence of the Shubnikov-de Haas (SdH) oscillations spectra of
the quasi-two di- mensional organic metal (ET)8[Hg4Cl12(C6H5Br)]2 have been
studied up to 1.1 GPa in pulsed magne... | cond-mat_str-el |
Valence skipping, internal doping and site-selective Mott transition in
PbCoO$_3$ under pressure: We present a computational study of PbCoO$_3$ at ambient and elevated
pressure. We employ the static and dynamic treatment of local correlation in
form of density functional theory + $U$ (DFT+$U$) and + dynamical mean-fi... | cond-mat_str-el |
Fractional quantum Hall states at zero magnetic field: We present a simple prescription to flatten isolated Bloch bands with
non-zero Chern number. We first show that approximate flattening of bands with
non-zero Chern number is possible by tuning ratios of nearest-neighbor and
next-nearest neighbor hoppings in the Hal... | cond-mat_str-el |
Nonperturbative Dynamical Theory and A Scheme for Nonequilibrium
Transport: We develop a nonperturbative dynamical theory (NDT) that is useful for
treating nonequilibrium transport in a system with strong correlation. We apply
our NDT to the single-impurity Anderson model in equilibrium to check its
reliability by co... | cond-mat_str-el |
Interacting Fermions Picture for Dimer Models: Recent numerical results on classical dimers with weak aligning interactions
have been theoretically justified via a Coulomb Gas representation of the
height random variable. Here we propose a completely different representation,
the Interacting Fermions Picture, which avo... | cond-mat_str-el |
Role of exciton screening in the 7/3 fractional quantum Hall effect: The excitations of the 7/3 fractional Hall state, one of the most prominent
states in the second Landau level, are not understood. We study the effect of
screening by composite fermion excitons and find that it causes a strong
renormalization at 7/3, ... | cond-mat_str-el |
'Kondo state' and Kondo resonance in a two-dimensional electron gas: The delicate balance of spin-screening and spin-aligning interactions
determines many of the peculiar properties of dilute magnetic systems. We study
a surface-supported all-organic multi-impurity Kondo spin system at the atomic
scale by low-temperatu... | cond-mat_str-el |
Persistence of singlet fluctuations in the coupled spin tetrahedra
system Cu2Te2O5Br2 revealed by high-field magnetization and 79Br NQR - 125Te
NMR: We present high-field magnetization and $^{79}$Br nuclear quadrupole
resonance (NQR) and $^{125}$Te nuclear magnetic resonance (NMR) studies in the
weakly coupled Cu$^... | cond-mat_str-el |
Critical phase induced by Berry phase and dissipation in a spin chain: Motivated by experiments on spin chains embedded in a metallic bath, as well
as closed quantum systems described by long-range interacting Hamiltonians, we
study a critical SU(N) spin chain perturbed by dissipation, or equivalently,
after space-time... | cond-mat_str-el |
Evidence for strong 5d electron correlations and electron-magnon
coupling in a pyrochlore, Y2Ir2O7: We report the observation of an unusual behavior of highly extended 5d
electrons in Y2Ir2O7 belonging to pyrochlore family of great current interest
using high resolution photoemission spectroscopy. The experimental bu... | cond-mat_str-el |
Dielectric signature of charge order in lanthanum nickelates: Three charge-ordering lanthanum nickelates La2-xAxNiO4, substituted with
specific amounts of A = Sr, Ca, and Ba to achieve commensurate charge order,
are investigated using broadband dielectric spectroscopy up to GHz frequencies.
The transition temperatures ... | cond-mat_str-el |
Fragile magnetic order in metallic quasicrystals: Inspired by recent experimental studies of local magnetic moments interacting
with a metallic quasicrystal, we study the low-temperature fate of spins placed
in the two-dimensional Ammann-Beenker tiling. In the diluted local moment
limit, we calculate the spin relaxatio... | cond-mat_str-el |
Family of Sachdev-Ye-Kitaev models motivated by experimental
considerations: Several condensed-matter platforms have been proposed recently to realize the
Sachdev-Ye-Kitaev (SYK) model in their low-energy limit. In these proposed
realizations, the characteristic SYK behavior is expected to occur under
certain assumpt... | cond-mat_str-el |
Spin textures on general surfaces of the correlated topological
insulator SmB6: Employing the $\mathbf{k}\cdot\mathbf{p}$ expansion for a family of
tight-binding models for SmB$_6$, we analytically compute topological surface
states on a generic $(lmn)$ surface. We show how the Dirac-cone spin structure
depends on mo... | cond-mat_str-el |
Supercurrent and multiple singlet-doublet phase transitions of a quantum
dot Josephson junction inside an Aharonov-Bohm ring: We study a quantum dot Josephson junction inside an Aharonov-Bohm
environment. The geometry is modeled by an Anderson impurity coupled to two
directly-linked BCS leads. We illustrate that the ... | cond-mat_str-el |
Permutation Group Symmetry and Correlations: Correlation factors are constructed that are consistent with the permutation
symmetry group of N Fermions at given value of the filling factor. | cond-mat_str-el |
Hybrid excitations due to crystal-field, spin-orbit coupling and
spin-waves in LiFePO$_4$: We report on the spin waves and crystal field excitations in single crystal
LiFePO$_4$ by inelastic neutron scattering over a wide range of temperatures,
below and above the antiferromagnetic transition of this system. In parti... | cond-mat_str-el |
Antiferromagnetism in the magnetoelectric effect single crystal
LiMnPO$_4$: Elastic and inelastic neutron scattering studies reveal details of the
antiferromagnetic tansition and intriguing spin-dynamics in the
magneto-electric effect single crystal LiMnPO$_4$. The elastic scattering
studies confirm the system is ant... | cond-mat_str-el |
Classical spin dynamics based on SU($N$) coherent states: We introduce a classical limit of the dynamics of quantum spin systems based
on coherent states of SU($N$), where $N$ is the dimension of the local Hilbert
space. This approach, that generalizes the well-known Landau-Lifshitz dynamics
from SU(2) to SU($N$), prov... | cond-mat_str-el |
Orbital-singlet pairing and order parameter symmetry in Sr_2RuO_4: Based on the degeneracy of the d_{zx} and d_{yz} orbitals in Sr_2RuO_4 it is
argued that the Cooper pairs condense in orbital singlets. Together with the
spin-triplet wave functions the real-space wave function then is symmetric.
Considering interaction... | cond-mat_str-el |
Cycloidal Magnetic Ordering in Noncentrosymmetric EuIrGe$_3$: Successive magnetic phase transitions at $T_{\text{N}}$=12.2 K,
$T_{\text{N}}^{\;\prime}$=7.0 K, and $T_{\text{N}}^{\;*}$=5.0 K in EuIrGe$_3$,
an intermetallic compound with a body centered tetragonal lattice belonging to
a polar space group $I4mm$, has been... | cond-mat_str-el |
Photoinduced charge carrier dynamics in Hubbard two-leg ladders and
chains: The charge carrier dynamics of doped electronic correlated systems on ladders
and chains, subject to ultrafast photoirradiation, is investigated using the
time-dependent Lanczos method. The time-resolved optical conductivity and the
temporal ... | cond-mat_str-el |
Massive CP$^1$ theory from a microscopic model for doped
antiferromagnets: A path-integral for the t-J model in two dimensions is constructed based on
Dirac quantization, with an action found originally by Wiegmann (Phys. Rev.
Lett. {\bf 60}, 821 (1988); Nucl. Phys. B323, 311 (1989)). Concentrating on the
low doping ... | cond-mat_str-el |
Short-Range Entangled Bosonic States with Chiral Edge Modes and
$T$-duality of Heterotic Strings: We consider states of bosons in two dimensions that do not support anyons in
the bulk, but nevertheless have stable chiral edge modes that are protected
even without any symmetry. Such states must have edge modes with ce... | cond-mat_str-el |
DC and optical signatures of the topological reconstruction of the Fermi
surface for electrons with parabolic band dispersion: We study the main intra-band and inter-band transport properties at zero
temperature of free electron-like system undergoing a topological
reconstruction of the Fermi surface for the two-dime... | cond-mat_str-el |
Destruction of Neel order and local spin spirals in insulating
La_{2-x}Sr_xCuO_4: Starting from the t-J model, we derive an effective field theory describing
the spin dynamics in the insulating phase of La_{2-x}Sr_xCuO_4, x < 0.055, at
low temperature. Using Monte Carlo simulations, we show that the destruction of
Ne... | cond-mat_str-el |
Evidence for Charge Glass-like Behavior in Lightly Doped
La_{2-x}Sr_{x}CuO_{4} at Low Temperatures: A c-axis magnetotransport and resistance noise study in
La_{1.97}Sr_{0.03}CuO_{4} reveals clear signatures of glassiness, such as
hysteresis, memory, and slow, correlated dynamics, but only at temperatures (T)
well bel... | cond-mat_str-el |
Jahn-Teller systems at half filling: crossover from Heisenberg to Ising
behavior: The Jahn-Teller model with $E\otimes\beta$ electron-phonon coupling and local
(Hubbard-like) Coulomb interaction is considered to describe a lattice system
with two orbitals per site at half filling. Starting from a state with one
elect... | cond-mat_str-el |
Magnetic phase diagram and structure of the magnetic phases in the
quasi-one-dimensional antiferromagnet BaCu_2Si_2O_7: symmetry analysis: We have performed a symmetry analysis of the properties of the recently
discovered quasi-one-dimensional compound BaCu_2Si_2O_7. The existence of the
unusual spin-reorientation tr... | cond-mat_str-el |
Quantum criticality with two length scales: The theory of deconfined quantum critical points describes phase transitions
at temperature T = 0 outside the standard paradigm, predicting continuous
transformations between certain ordered states where conventional theory
requires discontinuities. Numerous computer simulati... | cond-mat_str-el |
Magnetic Single-Electron Transistor as a Tunable Model System for
Kondo-Destroying Quantum Criticality: Single-electron transistors attached to ferromagnetic leads can undergo a
continuous quantum phase transition as their gate voltage is tuned. The
corresponding quantum critical point separates a Fermi liquid phase ... | cond-mat_str-el |
Orbital ordering transition in Ca$_2$RuO$_4$ observed with resonant
x-ray diffraction: Resonant x-ray diffraction performed at the $\rm L_{II}$ and $\rm L_{III}$
absorption edges of Ru has been used to investigate the magnetic and orbital
ordering in Ca$_2$RuO$_4$ single crystals. A large resonant enhancement due to
... | cond-mat_str-el |
Weyl Fermion Magneto-Electrodynamics and Ultra-low Field Quantum Limit
in TaAs: Topological semimetals are predicted to exhibit unconventional
electrodynamics, but a central experimental challenge is singling out the
contributions from the topological bands. TaAs is the prototypical example,
where 24 Weyl points and ... | cond-mat_str-el |
The electronic structure and magnetic phase transition of hexagonal FeSe
thin films studied by photoemission spectroscopy: Hexagonal FeSe thin films were grown on SrTiO3 substrates and the temperature
and thickness dependence of their electronic structures were studied. The
hexagonal FeSe is found to be metallic and ... | cond-mat_str-el |
Ground state of Ce$_{3}$Bi$_{4}$Pd$_{3}$ unraveled by hydrostatic
pressure: Noncentrosymmetric Ce$_{3}$Bi$_{4}$Pd$_{3}$ has attracted a lot of attention
as a candidate for strongly correlated topological material, yet its
experimental ground state remains a matter of contention. Two conflicting
scenarios have emerged... | cond-mat_str-el |
The Role of the Exchange Interaction in the One-Dimensional
$n$-Component Hubbard Model: The commensurate $p/q$-filled $n$-component Hubbard chain was investigated by
bosonization and high-precision density-matrix renormalization-group analysis.
It was found that depending on the relation between the number of compon... | cond-mat_str-el |
Honeycomb rare-earth magnets with anisotropic exchange interactions: We study the rare-earth magnets on a honeycomb lattice, and are particularly
interested in the experimental consequences of the highly anisotropic spin
interaction due to the spin-orbit entanglement. We perform a high-temperature
series expansion usin... | cond-mat_str-el |
Negative Josephson coupling in the Kondo strong coupling limit: We Show that pair hopping through a Kondo singlet give rise to a negative
Josephson coupling. Thus, our calculation supports the existance of staggered
pair correlations in the strong coupling limit of a one dimensional Kondo
lattice. | cond-mat_str-el |
Crystal Field and Magnetoelastic Interactions in Tb2Ti2O7: In terms of a semi-phenomenological exchange charge model, we have obtained
estimates of parameters of the crystal field and parameters of the
electron-deformation interaction in terbium titanate Tb2Ti2O7 with a pyrochlore
structure. The obtained set of paramet... | cond-mat_str-el |
Unconventional resistivity at the border of metallic antiferromagnetism
in NiS2: We report low-temperature and high-pressure measurements of the electrical
resistivity \rho(T) of the antiferromagnetic compound NiS_2 in its
high-pressure metallic state. The form of \rho(T) suggests that metallic
antiferromagnetism in ... | cond-mat_str-el |
Scalar Chiral Spin-1/2 Order on Kagome Lattices in Nd3Sb3Mg2O14: We introduce $\mathrm{Nd_{3}Sb_{3}Mg_{2}O_{14}}$ with ideal kagome lattices
of neodymium ions in ABC stacking. Thermodynamic measurements show a
Curie-Weiss temperature of $\Theta_{CW}=-0.12~$K, a Nd$^{3+}$ spin-1/2 Kramers
doublet ground state, and a sec... | cond-mat_str-el |
Strain induced edge magnetism at zigzag edge in graphene quantum dot: We study the temperature dependent magnetic susceptibility of a strained
graphene quantum dot by using the determinant quantum Monte Carlo method.
Within the Hubbard model on a honeycomb lattice, our unbiased numerical results
show that a relative sm... | cond-mat_str-el |
Emergent SU(3) symmetry in a four leg spin tube: We consider an antiferromagnetic four leg spin-1/2 tube using abelian and
non-abelian bosonization. We show that in the limit of weak interchain
coupling, the most relevant interaction gives rise to an emergent SU(3)}
symmetry, broken only by marginal interactions that c... | cond-mat_str-el |
Diagnosing a strong topological insulator by quantum oscillations: We show how quantum oscillation measurements of surface states in an
insulator may allow to diagnose a strong topological insulator and distinguish
it from its weak or topologically trivial counterpart. The criterion is defined
by the parity of the numb... | cond-mat_str-el |
Spin-phonon interaction increased by compressive strain in
antiferromagnetic MnO thin films: MnO thin films with various thicknesses and strains were grown on MgO
substrates by pulsed laser deposition, then characterized using x-ray
diffraction and infrared reflectance spectroscopy. Films grown on
(001)-oriented MgO ... | cond-mat_str-el |
A note on GMP algebra, dipole symmetry, and Hohenberg-Mermin-Wagner
theorem in the lowest Landau level: After projection to the lowest Landau level translational invariance and
particle conservation combine into dipole symmetry. We show that the new
symmetry forbids spontaneous $U(1)$ symmetry breaking at zero temper... | cond-mat_str-el |
Single-hole dynamics in the t-J model: The quasi-particle weight of a single hole in an antiferromagnetic background
is studied in the semiclassical approximation. We start from the t-J model,
generalize it to arbitrary spin S by employing an appropriate coherent state
representation for the hole, and derive an effecti... | cond-mat_str-el |
Collective modes for helical edge state interacting with quantum light: We investigate the light-matter interaction between the edge state of a 2D
topological insulator and quantum electromagnetic field. The interaction
originates from the Zeeman term between the spin of the edge electrons and the
magnetic field, and a... | cond-mat_str-el |
Uniform electron gas at finite temperatures: We calculate the free energy of the quantum uniform electron gas for
temperatures from near zero to 100 times the Fermi energy, approaching the
classical limit. An extension of the Vashista-Singwi theory to finite
temperatures and self-consistent compressibility sum rule is ... | cond-mat_str-el |
The transport-structural correspondence across the nematic phase
transition probed by elasto-x-ray diffraction: Electronic nematicity in iron pnictide materials is coupled to both the
lattice and the conducting electrons, which allows both structural and
transport observables to probe nematic fluctuations and the ord... | cond-mat_str-el |
Novel aspects and strong correlation in the electronic structure of
Sr$_2$FeMoO$_6$: We investigate the electronic structure of Sr$_2$FeMoO$_6$ combining
photoemission spectroscopy with a wide range of photon energies and electronic
structure calculations based on first-principle as well as model Hamiltonian
approach... | cond-mat_str-el |
Doping-dependent magnetization plateaux in p-merized Hubbard chains: We study zero-temperature Hubbard chains with periodically modulated hopping
at arbitrary filling n and magnetization m. We show that the magnetization
curves have plateaux at certain values of m which depend on the periodicity p
and the filling. At c... | cond-mat_str-el |
Photoemission Study of Rare-Earth Ditelluride Compounds (ReTe_2 : Re =
La, Pr, Sm, and Gd): We studied the electronic structure of rare-earth ditelluride (ReTe_2 : Re =
La, Pr, Sm, and Gd) using photoemission spectroscopy. From the x-ray
photoelectron spectroscopy (XPS) study of the 3d core levels of rare-earth
eleme... | cond-mat_str-el |
Matrix product state recursion methods for strongly correlated quantum
systems: We present a method for extrapolation of real-time dynamical correlation
functions which can improve the capability of matrix product state methods to
compute spectral functions. Unlike the widely used linear prediction method,
which igno... | cond-mat_str-el |
Ground-State Phase Diagram of the Bond-Alternating $S=2$ Quantum Spin
Chain with the $XXZ$ and On-Site Anisotropies -- Symmetry Protected
Topological Phase versus Trivial Phase: We investigate the ground-state phase diagram of the bond-alternating $S=2$
quantum spin chain with the $XXZ$ and on-site anisotropies. Fo... | cond-mat_str-el |
Equation of motion approach to the solution of Anderson model: Based on an equation of motion approach the single impurity Anderson
model(SIAM) is reexamined. Using the cluster expansions the equations of motion
of Green functions are transformed into the corresponding equations of motion
of connected Green functions, ... | cond-mat_str-el |
Origin of room-temperature ferromagnetism in Mn doped semiconducting
CdGeP2: CdGeP2 chalcopyrites doped with Mn have been recently found to exhibit room
temperature ferromagnetism. Isovalent substitution of the Cd site is expected,
however, to create antiferromagnetism, in analogy with the well-known CdTe:Mn
(d^5) ca... | cond-mat_str-el |
Dynamic electronic correlation effects in NbO$_2$ as compared to VO$_2$: In this work we present a comparative investigation of the electronic
structures of NbO$_2$ and VO$_2$ obtained within the combination of density
functional theory and cluster-dynamical mean field theory calculations. We
investigate the role of dy... | cond-mat_str-el |
A quantum theory of the nearly frozen charge glass: We study long-range interacting electrons on the triangular lattice using
mixed quantum/classical simulations going beyond the usual classical
descriptions of the lattice Coulomb fluid. Our results in the strong
interaction limit indicate that the emergence and prolif... | cond-mat_str-el |
Optical study of phase transitions in single-crystalline RuP: RuP single crystals of MnP-type orthorhombic structure were synthesized by
the Sn flux method. Temperature-dependent x-ray diffraction measurements reveal
that the compound experiences two structural phase transitions, which are
further confirmed by enormous... | cond-mat_str-el |
Spectral Properties of the Attractive Hubbard Model: Deviations from Fermi liquid behavior are well documented in the normal state
of the cuprate superconductors, and some of these differences are possibly
related to pre-formed pairs appearing at temperatures above T_c. In order to
test these ideas we have investigated... | cond-mat_str-el |
Expansion potentials for exact far-from-equilibrium spreading of
particles and energy: The rates at which energy and particle densities move to equalize arbitrarily
large temperature and chemical potential differences in an isolated quantum
system have an emergent thermodynamical description whenever energy or partic... | cond-mat_str-el |
Kinetic theory of spin-polarized systems in electric and magnetic fields
with spin-orbit coupling: I. Kinetic equation and anomalous Hall and
spin-Hall effects: The coupled kinetic equation for density and spin Wigner functions are
derived including spin-orbit coupling, electric and magnetic field as well as
selfco... | cond-mat_str-el |
Momentum-dependent magnon lifetime in the metallic non-collinear
triangular antiferromagnet CrB2: Non-collinear magnetic order arises for various reasons in several magnetic
systems and exhibits interesting spin dynamics. Despite its ubiquitous
presence, little is known of how magnons, otherwise stable quasiparticles... | cond-mat_str-el |
Application of polynomial-expansion Monte Carlo method to a spin-ice
Kondo lattice model: We present the results of Monte Carlo simulation for a Kondo lattice model in
which itinerant electrons interact with Ising spins with spin-ice type
easy-axis anisotropy on a pyrochlore lattice. We demonstrate the efficiency of
... | cond-mat_str-el |
Nonlocal Effect of Local Nonmagnetic Impurity in High-Tc
Superconductors: Induced Local Moment and Huge Residual Resistivity: We study a Hubbard model with a strong onsite impurity potential based on an
improved fluctuation-exchange (FLEX) approximation, which we call the GVI-FLEX
method. We find that (i) both local ... | cond-mat_str-el |
Data-driven estimation of transfer integrals in undoped cuprates: Undoped cuprates are an abundant class of magnetic insulators, in which the
synergy of rich chemistry and sizable quantum fluctuations leads to a variety
of magnetic behaviors. Understanding the magnetism of these materials is
impossible without the know... | cond-mat_str-el |
Toward a systematic 1/d expansion: Two particle properties: We present a procedure to calculate 1/d corrections to the two-particle
properties around the infinite dimensional dynamical mean field limit. Our
method is based on a modified version of the scheme of Ref.
onlinecite{SchillerIngersent}}. To test our method we... | cond-mat_str-el |
Two-fluid coexistence in a spinless fermions chain with pair hopping: We show that a simple one-dimensional model of spinless fermions with pair
hopping displays a phase in which a Luttinger liquid of paired fermions
coexists with a Luttinger liquid of unpaired fermions. Our results are based on
extensive numerical den... | cond-mat_str-el |
Gate-tunable heavy fermion quantum criticality in a moiré Kondo
lattice: We propose a realization of Kondo-lattice physics in moir\'e superlattices at
the interface between a WX$_2$ homobilayer and MoX$_2$ monolayer (where
X=S,Se). Under appropriate gating conditions, the interface-WX$_2$-layer forms
a triangular lat... | cond-mat_str-el |
Equilibration in a chiral Luttinger liquid: We explore the weak-strong-coupling Bose-Fermi duality in a model of a
single-channel integer or fractional quantum Hall edge state with a
finite-range interaction. The system is described by a chiral Luttinger liquid
with non-linear dispersion of bosonic and fermonic excitat... | cond-mat_str-el |
Disordered quantum spin state in the stripe lattice system consisting of
triangular and square tilings: Quantum fluctuations originating phase competition or geometrical frustration
of spins lead to novel states such as a quantum critical point and a quantum
spin liquid where the strong quantum fluctuations suppress ... | cond-mat_str-el |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.