text stringlengths 89 2.49k | category stringclasses 19
values |
|---|---|
The Effect of $f$-$d$ Magnetic Coupling in Multiferroic $R$MnO$_3$
Crystals: We have established detailed magnetoelectric phase diagrams of
(Eu$_{0.595}$Y$_{0.405}$)$_{1-x}$Tb$_x$MnO$_3$ ($0 \le x \le 1$) and
(Eu,Y)$_{1-x}$Gd$_x$MnO$_3$ ($0 \le x \le 0.69$), whose average ionic radii of
$R$-site ($R$: rare earth) cat... | cond-mat_str-el |
Competition between Interactions and Randomness in Photoinduced
Synchronization of Charge Oscillations on a Dimer Lattice: The synchronization of charge oscillations after photoexcitation that has
been realized through the emergence of an electronic breathing mode on dimer
lattices is studied here from the viewpoint ... | cond-mat_str-el |
New gap equation for a marginal Fermi liquid: Assuming a phenomenological self-energy $Im \Sigma(\omega) \sim
|\omega|^{\beta\}, (\beta=1 $), which becomes gapped below $T_c$, we derived a
new gap equation. The new gap equation contains the effect of the kinetic
energy gain upon developing a superconducting order param... | cond-mat_str-el |
New Paired-Wavefunction for the Frustrated Antiferromagnetic Spin-Half
Chain: I propose a new paired-wavefunction with a parameter that continuously
interpolates from the 1D Jastrow-product to the Majumdar-Ghosh
dimer-wavefunction appropriate for the frustrated Heisenberg $S = 1/2$
antiferromagnet. This spin paired-s... | cond-mat_str-el |
Fragile Mott Insulators: We prove that there exists a class of crystalline insulators, which we call
"fragile Mott insulators" which are not adiabatically connected to any sort of
band insulator provided time-reversal and certain point-group symmetries are
respected, but which are otherwise unspectacular in that they e... | cond-mat_str-el |
Unusual behaviors in the transport properties of REFe$_{4}$P$_{12}$ (RE:
La, Ce, Pr, and Nd): We have investigated the resistivity ($\rho$), thermoelectric power (TEP) and
Hall coefficient ($R_{H}$) on high quality single crystals of
REFe$_{4}$P$_{12}$. TEP in CeFe$_{4}$P$_{12}$ is extremely large ($\sim$
0.5mV/K at ... | cond-mat_str-el |
Antiferromagnetic chiral spin density wave and strain-induced Chern
insulator in the square lattice Hubbard model with frustration: We employ the Hartree-Fock approximation to identify the magnetic ground
state of the Hubbard model on a frustrated square lattice. We investigate the
phase diagram as a function of the ... | cond-mat_str-el |
Localized moments and the stability of antiferromagnetic order in Yb3Pt4: We present here the results of electrical resistivity {\rho}, magnetization
M, ac susceptibility \c{hi}ac', and specific heat CM measurements that have
been carried out on single crystals of Yb3Pt4 over a wide range of fields and
temperatures. Th... | cond-mat_str-el |
An effect of the uniaxial strain on the temperature of Bose-Einstein
condensation of the intersite bipolarons: We have studied an effect of uniaxial strain to the temperature of
Bose-Einstein condensation of intersite bipolarons within the framework of
Extended Holstein-Hubbard model. Uniaxial lattice strains are tak... | cond-mat_str-el |
Staggered Flux State in Two-Dimensional Hubbard Models: The stability and other properties of a staggered flux (SF) state or a
correlated d-density wave state are studied for the Hubbard (t-t'-U) model on
extended square lattices, as a low-lying state that competes with the
d(x2-y2)-wave superconductivity (d-SC) and po... | cond-mat_str-el |
Nuclear magnetic resonance signature of the spin-nematic phase in
LiCuVO$_{4}$ at high magnetic fields: We report a 51V nuclear magnetic resonance investigation of the frustrated
spin-1/2 chain compound LiCuVO4, performed in pulsed magnetic fields and
focused on high-field phases up to 55 T. For the crystal orientati... | cond-mat_str-el |
Stability of the doped antiferromagnetic state of the t-t'-Hubbard model: The next-nearest-neighbour hopping term t' is shown to stabilize the AF state
of the doped Hubbard model with respect to transverse perturbations in the
order- parameter by strongly suppressing the intraband particle-hole processes.
For a fixed s... | cond-mat_str-el |
First order transition from ferromagnetism to antiferromagnetism in
Ce(Fe$_{0.96}$Al$_{0.04}$)$_2$: a magnetotransport study: The magnetotransport behaviour is investigated in detail across the first
order magnetic phase transition from ferromagnetic to antiferromagnetic state
in polycrystalline Ce(Fe$_{0.96}$Al$_{0.... | cond-mat_str-el |
$\require{mhchem}$Quantum paramagnetism in the decorated square-kagome
antiferromagnet $\ce{Na6Cu7BiO4(PO4)4Cl3}$: $\require{mhchem}$The square-kagome lattice Heisenberg antiferromagnet is a
highly frustrated Hamiltonian whose material realizations have been scarce. We
theoretically investigate the recently synthesiz... | cond-mat_str-el |
Symmetry Protected Topological Order by Folding a One-Dimensional
Spin-$1/2$ Chain: We present a toy model with a Hamiltonian $H^{(2)}_T$ on a folded
one-dimensional spin chain. The non-trivial ground states of $H^{(2)}_T$ are
separated by a gap from the excited states. By analyzing the symmetries in the
model, we fi... | cond-mat_str-el |
Polaron with Quadratic Electron-phonon Interaction: We present the first numerically exact study of a polaron with quadratic
coupling to the oscillator displacement, using two alternative methodological
developments. Our results cover both anti-adiabatic and adiabatic regimes and
the entire range of electron-phonon cou... | cond-mat_str-el |
Optical manipulation of electronic dimensionality in a quantum material: Exotic phenomenon can be achieved in quantum materials by confining
electronic states into two dimensions. For example, relativistic fermions are
realised in a single layer of carbon atoms, the quantized Hall effect can
result from two-dimensional... | cond-mat_str-el |
Mott Transition of MnO under Pressure: Comparison of Correlated Band
Theories: The electronic structure, magnetic moment, and volume collapse of MnO under
pressure are obtained from four different correlated band theory methods; local
density approximation + Hubbard U (LDA+U), pseudopotential self-interaction
correct... | cond-mat_str-el |
Conductance and Kondo effect of a controlled single atom contact: The tip of a low-temperature scanning tunneling microscope is brought into
contact with individual Kondo impurities (cobalt atoms) adsorbed on a Cu(100)
surface. A smooth transition from the tunneling regime to a point contact with
a conductance of $G\ap... | cond-mat_str-el |
Probing Critical Surfaces in Momentum Space Using Real-Space
Entanglement Entropy: Bose versus Fermi: A co-dimension one critical surface in the momentum space can be either a
familiar Fermi surface, which separates occupied states from empty ones in the
non-interacting fermion case, or a novel Bose surface, where ga... | cond-mat_str-el |
Spin-orbit coupling and ESR theory for carbon nanotubes: A theoretical description of ESR in 1D interacting metals is given, with
primary emphasis on carbon nanotubes. The spin-orbit coupling is derived, and
the resulting ESR spectrum is analyzed by field theory and exact
diagonalization. Drastic differences in the ESR... | cond-mat_str-el |
Quantum phase transition in the one-dimensional compass model: We introduce a one-dimensional model which interpolates between the Ising
model and the quantum compass model with frustrated pseudospin interactions
$\sigma_i^z\sigma_{i+1}^z$ and $\sigma_i^x\sigma_{i+1}^x$, alternating between
even/odd bonds, and present ... | cond-mat_str-el |
Hidden Integrability of a Kondo Impurity in an Unconventional Host: We study a spin-1/2 Kondo impurity coupled to an unconventional host in which
the density of band states vanishes either precisely at (``gapless'' systems)
or on some interval around the Fermi level (``gapped''systems). Despite an
essentially nonlinear... | cond-mat_str-el |
A High Pressure Neutron Study of Colossal Magnetoresistant
NdMnAsO0.95F0.05: A high pressure neutron diffraction study of the oxypnictide NdMnAsO0.95F0.05
has been performed at temperatures of 290 K - 383 K and pressures up to 8.59
GPa. The results demonstrate that the antiferromagnetic order of the Mn spins
is robus... | cond-mat_str-el |
Spin Configuration in the 1/3 Magnetization Plateau of Azurite
Determined by NMR: High magnetic field $^{63,65}$Cu NMR spectra were used to determine the local
spin polarization in the 1/3 magnetization plateau of azurite,
Cu$_3$(CO$_3$)$_2$(OH)$_2$, which is a model system for the distorted diamond
antiferromagnetic... | cond-mat_str-el |
Exploring the spin-orbital ground state of Ba3CuSb2O9: Motivated by the absence of both spin freezing and a cooperative Jahn-Teller
effect at the lowest measured temperatures, we study the ground state of
Ba3CuSb2O9. We solve a general spin-orbital model on both the honeycomb and the
decorated honeycomb lattice, reveal... | cond-mat_str-el |
The one dimensional Kondo lattice model at partial band filling: The Kondo lattice model introduced in 1977 describes a lattice of localized
magnetic moments interacting with a sea of conduction electrons. It is one of
the most important canonical models in the study of a class of rare earth
compounds, called heavy fer... | cond-mat_str-el |
LaMnO$_3$ is a Mott Insulator: an precise definition and an evaluation
of the local interaction strength: We compare the interaction parameters measured on LaMnO$_3$ to single site
dynamical mean field estimates of the critical correlation strength needed to
drive a Mott transition, finding that the total correlation... | cond-mat_str-el |
"Self-Dual" Quantum Critical Point on the surface of $3d$ Topological
Insulator: In the last few years a lot of exotic and anomalous topological phases were
constructed by proliferating the vortex like topological defects on the surface
of the $3d$ topological insulator (TI). In this work, rather than considering
top... | cond-mat_str-el |
Hydrostatic pressure effect on Co-based honeycomb magnet BaCo2(AsO4)2: The honeycomb antiferromagnet BaCo2(AsO4)2, in which small in-plane magnetic
fields (H1 = 0.26 T and H2 = 0.52 T at T = 1.8 K < TN = 5.4 K) induce two
magnetic phase transitions, has attracted attention as a possible candidate
material for the reali... | cond-mat_str-el |
An exactly size consistent geminal power via Jastrow factor networks in
a local one particle basis: The accurate but expensive product of geminals ansatz may be approximated by
a geminal power, but this approach sacrifices size consistency. Here we show
both analytically and numerically that a size consistent form ve... | cond-mat_str-el |
Deconfined quantum criticality driven by Dirac fermions in SU(2)
antiferromagnets: Quantum electrodynamics in 2+1 dimensions is an effective gauge theory for
the so called algebraic quantum liquids. A new type of such a liquid, the
algebraic charge liquid, has been proposed recently in the context of
deconfined quant... | cond-mat_str-el |
Flat bands and $Z_2$ topological phases in a non-Abelian kagome lattice: We introduce a non-Abelian kagome lattice model that has both time-reversal
and inversion symmetries and study the flat band physics and topological phases
of this model. Due to the coexistence of both time-reversal and inversion
symmetries, the e... | cond-mat_str-el |
Defect-induced edge ferromagnetism and fractional spin excitations of
the SU(4) $π$-flux Hubbard model on honeycomb lattice: Recently, a SU(4) $\pi$-flux Hubbard model on the honeycomb lattice has been
proposed to study the spin-orbit excitations of $\alpha$-ZrCl$_3$
[Phys.~Rev.~Lett. 121.097201~(2017)]. Based on thi... | cond-mat_str-el |
Phase-Space Berry Phases in Chiral Magnets: Dzyaloshinskii-Moriya
Interaction and the Charge of Skyrmions: The semiclassical motion of electrons in phase space, x=(R, k), is influenced
by Berry phases described by a 6-component vector potential, A=(A^R, A^k). In
chiral magnets Dzyaloshinskii-Moriya (DM) interactions ... | cond-mat_str-el |
Visualizing Strange Metallic Correlations in the 2D Fermi-Hubbard Model
with AI: Strongly correlated phases of matter are often described in terms of
straightforward electronic patterns. This has so far been the basis for
studying the Fermi-Hubbard model realized with ultracold atoms. Here, we show
that artificial in... | cond-mat_str-el |
Exciton doublet in the Mott-Hubbard LiCuVO$_4$ insulator identified by
spectral ellipsometry: Spectroscopic ellipsometry was used to study the dielectric function of
LiCuVO$_{4}$, a compound comprised of chains of edge-sharing CuO$_4$
plaquettes, in the spectral range (0.75 - 6.5) eV at temperatures (7-300) K.
For ph... | cond-mat_str-el |
Persistence of Ising-like easy-axis spin correlations in the
paramagnetic state of the spin-1 chain compound NiTe$_2$O$_5$: A $^{125}$Te nuclear magnetic resonance (NMR) study was carried out in the
paramagnetic state of the recently discovered quasi-one-dimensional spin-1
chain compound NiTe$_2$O$_5$. We observed th... | cond-mat_str-el |
Thermodynamic behavior of the XXZ Heisenberg s=1/2 chain around the
factorizing magnetic field: We have investigated the zero and finite temperature behaviors of the
anisotropic antiferromagnetic Heisenberg XXZ spin-1/2 chain in the presence of
a transverse magnetic field (h). The attention is concentrated on an inte... | cond-mat_str-el |
Lattice and orbital fluctuations in TiPO4: In the s = 1/2 antiferromagnetic spin chain material TiPO4 the formation of a
spin gap takes place in a two step process with two characteristic
temperatures, T*=111 K and TSP=74 K. We observe an unusual lattice dynamics
over a large temperature regime as well as evidence for ... | cond-mat_str-el |
Fractional Quantum Hall Effect of Hard-Core Bosons in Topological Flat
Bands: Recent proposals of topological flat band (TFB) models have provided a new
route to realize the fractional quantum Hall effect (FQHE) without Landau
levels. We study hard-core bosons with short-range interactions in two
representative TFB m... | cond-mat_str-el |
A time and spatially resolved quench of the fermionic Hubbard model
showing restricted equilibration: We investigate the quench of half-filled 1D and 2D fermionic Hubbard models
to models without Coulomb interaction. Since the time propagation is gaussian
we can use a variety of time-dependent quantum Monte Carlo met... | cond-mat_str-el |
Ground State of the Easy-Axis Rare-Earth Kagomé Langasite
Pr$_3$Ga$_5$SiO$_{14}$: We report muon spin relaxation ($\mu$SR) and $^{69,71}$Ga nuclear quadrupolar
resonance (NQR) local-probe investigations of the kagom\'e compound
Pr$_3$Ga$_5$SiO$_{14}$. Small quasi-static random internal fields develop below
40 K and p... | cond-mat_str-el |
Supersolid phases of hardcore bosons on the square lattice: Correlated
hopping, next-nearest neighbor hopping and frustration: We discuss the appearance of supersolid phases for interacting hardcore
bosons on the square lattice when, in addition to the standard nearest neighbor
hopping and repulsion, correlated or ne... | cond-mat_str-el |
Multipolar ordering from dynamical mean field theory with application to
CeB6: Magnetic and multipolar ordering in f electron systems takes place at low
temperatures of order 1-10 Kelvin. Combinations of first-principles with
many-body calculations for such low-energy properties of correlated materials
are challengin... | cond-mat_str-el |
Magnetic properties of the Anderson model: a local moment approach: We develop a local moment approach to static properties of the symmetric
Anderson model in the presence of a magnetic field, focussing in particular on
the strong coupling Kondo regime. The approach is innately simple and
physically transparent; but is... | cond-mat_str-el |
Unusual spin pseudogap behavior in the spin web lattice Cu$_3$TeO$_6$
probed by $^{125}$Te nuclear magnetic resonance: We present a $^{125}$Te nuclear magnetic resonance (NMR) study in the
three-dimensional spin web lattice Cu$_3$TeO$_6$, which harbors topological
magnons. The $^{125}$Te NMR spectra and the Knight sh... | cond-mat_str-el |
Excitation Spectra and Hard-core Thermodynamics of Bosonic Atoms In
Double Well Optical Lattices: A general coupled representation is proposed for bosonic atoms in double well
optical lattices. Based on such a representation, we investigate the excitation
spectra and thermodynamics of bosonic atoms in the optical lat... | cond-mat_str-el |
Organizing symmetry-protected topological phases by layering and
symmetry reduction: a minimalist perspective: It is demonstrated that fermionic/bosonic symmetry-protected topological
(SPT) phases across different dimensions and symmetry classes can be organized
using geometric constructions that increase dimensions ... | cond-mat_str-el |
Magnetic interactions in strongly correlated systems: spin and orbital
contributions: We present a technique to map an electronic model with local interactions (a
generalized multi-orbital Hubbard model) onto an effective model of interacting
classical spins, by requiring that the thermodynamic potentials associated ... | cond-mat_str-el |
Loop braiding statistics in exactly soluble 3D lattice models: We construct two exactly soluble lattice spin models that demonstrate the
importance of three-loop braiding statistics for the classification of 3D
gapped quantum phases. The two models are superficially similar: both are
gapped and both support particle-li... | cond-mat_str-el |
Effect of antiferromagnetic spin correlations on lattice distortion and
charge ordering in Pr$_{0.5}$Ca$_{1.5}$MnO$_{4}$: We use neutron scattering to study the lattice and magnetic structure of the
layered half-doped manganite Pr$_{0.5}$Ca$_{1.5}$MnO$_4$. On cooling from high
temperature, the system first becomes ch... | cond-mat_str-el |
Anisotropic magnetization studies of $R_2 Co Ga_8$ (R = Gd, Tb, Dy, Ho,
Er, Tm, Y and Lu) single crystals: Single crystals of R$_2$CoGa$_8$ series of compounds were grown, for the
first time, by high temperature solution growth (flux) method. These compounds
crystallize in a tetragonal crystal structure with the spac... | cond-mat_str-el |
Quantum effects for the 2D soliton in isotropic ferromagnets: We evaluate a zero-point quantum correction to a Belavin-Polyakov soliton in
an isotropic 2D ferromagnet. By revising the scattering problem of
quasi-particles by a soliton we show that it leads to the Aharonov-Bohm type of
scattering, hence the scattering d... | cond-mat_str-el |
Variational Ansatz for an Abelian to non-Abelian Topological Phase
Transition in $ν= 1/2 + 1/2$ Bilayers: We propose a one-parameter variational ansatz to describe the
tunneling-driven Abelian to non-Abelian transition in bosonic $\nu=1/2+1/2$
fractional quantum Hall bilayers. This ansatz, based on exact matrix produ... | cond-mat_str-el |
Microscopic theory for nematic fractional quantum Hall effect: We analyse various microscopic properties of the nematic fractional quantum
Hall effect (FQHN) in the thermodynamic limit, and present necessary conditions
required of the microscopic Hamiltonians for the nematic FQHE to be robust.
Analytical expressions fo... | cond-mat_str-el |
Effects of exchange distortions in the magnetic Kagome lattice: This study examines the effect of distorted triangular magnetic interactions
in the Kagome lattice. Using a Holstein-Primakoff expansion, we determine the
analytical solutions for classical energies and the spin-wave modes for various
magnetic configuratio... | cond-mat_str-el |
Exciton dissociation mediated by phonons in organic photovoltaics: It is well known that phonons can overscreen the bare Coulomb
electron-electron repulsion, turning it into the effective attraction that
binds the Cooper pairs responsible for BCS superconductivity. Here, we use a
simple lattice model to prove that the ... | cond-mat_str-el |
Few-body nature of Kondo correlated ground states: The quenching of degenerate impurity states in metals generally induces a
long-range correlated quantum state known as the Kondo screening cloud. While a
macroscopic number of particles clearly take part in forming this extended
structure, assessing the number of truly... | cond-mat_str-el |
Pseudoparticle approach to 1D integrable quantum models: Over the last three decades a large number of experimental studies on several
quasi one-dimensional (1D) metals and quasi1D Mott-Hubbard insulators have
produced evidence for distinct spectral features identified with charge-only
and spin-only fractionalized part... | cond-mat_str-el |
Magnetic field induced quantum phase transitions in the two-impurity
Anderson model: In the two-impurity Anderson model, the inter-impurity spin exchange
interaction favors a spin singlet state between two impurities leading to the
breakdown of the Kondo effect. We show that a local uniform magnetic field can
delocal... | cond-mat_str-el |
Zigzag and Checkerboard Magnetic Patterns in Orbitally Directional
Double-Exchange Systems: We analyze a $t_{2g}$ double-exchange system where the orbital directionality
of the itinerant degrees of freedom is a key dynamical feature that
self-adjusts in response to doping and leads to a phase diagram dominated by
two... | cond-mat_str-el |
The magnetic structure of Ce$_3$TiBi$_5$ and its relation to
current-induced magnetization: The control of magnetization using electric fields has been extensively
studied in magnetoelectric multiferroic insulator materials. Changes in
magnetization in bulk metals caused by electric currents have attracted less
atten... | cond-mat_str-el |
Gd pyrochlore under a staggered molecular field in Gd$_2$Ir$_2$O$_7$: The influence of a staggered molecular field in frustrated rare-earth
pyrochlores, produced via the magnetic iridium occupying the transition metal
site, can generate exotic ground states, such as the fragmentation of the
magnetization in the Ho comp... | cond-mat_str-el |
Phase diagram of the Kondo necklace: a mean-field renormalization group
approach: In this paper we investigate the magnetic properties of heavy fermions in the
antiferromagnetic and dense Kondo phases in the framework of the Kondo necklace
model. We use a mean field renormalization group approach to obtain a
temperat... | cond-mat_str-el |
Unifying static and dynamic properties in 3D quantum antiferromagnets: Quantum Monte Carlo simulations offer an unbiased means to study the static
and dynamic properties of quantum critical systems, while quantum field theory
provides direct analytical results. We study three dimensional, critical
quantum antiferromagn... | cond-mat_str-el |
Charge and spin dynamics of the Hubbard chains: We calculate the local correlation functions of charge and spin for the
one-chain and two-chain Hubbard model using the density matrix renormalization
group method and the recursion technique. Keeping only finite number of states
we get good accuracy for the low energy ex... | cond-mat_str-el |
Entanglement and logarithmic spirals in a quantum spin-1 many-body
system with competing dimer and trimer interactions: Spontaneous symmetry breaking (SSB) with type-B Goldstone modes is
investigated in the macroscopically degenerate phase for a quantum spin-1
many-body system with competing dimer and trimer interact... | cond-mat_str-el |
Melting of magnetization plateaus for kagome and square-kagome lattice
antiferromagnets: Unconventional features of the magnetization curve at zero temperature such
as plateaus or jumps are a hallmark of frustrated spin systems. Very little is
known about their behavior at non-zero temperatures. Here we investigate t... | cond-mat_str-el |
Stacking faults in $α$-RuCl$_3$ revealed by local electric
polarization: We present out-of-plane dielectric and magnetodielectric measurements of
single crystallines $\alpha$-RuCl$_3$ with various degrees of stack faults. A
frequency dependent, but field independent, dielectric anomaly appears at
$T_{A}\:(f=100\:\mat... | cond-mat_str-el |
Tomonaga-Luttinger parameters for doped Mott insulators: The Tomonaga--Luttinger parameter $K_{\rho}$ determines the critical behavior
in quasi one-dimensional correlated electron systems, e.g., the exponent
$\alpha$ for the density of states near the Fermi energy. We use the numerical
density-matrix renormalization gr... | cond-mat_str-el |
Emergence of nontrivial magnetic excitations in a spin liquid state of
kagome volborthite: When quantum fluctuations destroy underlying long-range ordered states, novel
quantum states emerge. Spin-liquid (SL) states of frustrated quantum
antiferromagnets, in which highly-correlated spins keep to fluctuate down to
ver... | cond-mat_str-el |
Low-energy excitations of the Hubbard model on the Kagomé lattice: The Hubbard model on the Kagom\'e lattice is investigated in a metallic phase
at half-filling. By introducing anisotropic electron hopping on the lattice, we
control geometrical frustration and clarify how the lattice geometry affects
physical propertie... | cond-mat_str-el |
Local and nonlocal order parameters in the Kitaev chain: We have calculated order parameters for the phases of the Kitaev chain with
interaction and dimerization at a special symmetric point applying the
Jordan-Wigner and other duality transformations. We use string order parameters
(SOPs) defined via the correlation f... | cond-mat_str-el |
Quantum criticality with a twist - interplay of correlations and Kohn
anomalies in three dimensions: A general understanding of quantum phase transitions in strongly correlated
materials is still lacking. By exploiting a cutting-edge quantum many-body
approach, the dynamical vertex approximation, we make an important... | cond-mat_str-el |
Doped Mott phase and charge correlations in monolayer 1T-NbSe$_2$: The doped Hubbard model is one of the paradigmatic platforms to engineer
exotic quantum many-body states, including charge-ordered states, strange
metals and unconventional superconductors. While undoped and doped correlated
phases have been experimenta... | cond-mat_str-el |
Hydrodynamic spin fluctuations in the antiferromagnetic Heisenberg chain: We study the finite temperature, low energy, long wave-length spectrum of the
dynamic structure factor of the spin-$1/2$ antiferromagnetic Heisenberg chain
in the presence of exchange anisotropy and external magnetic fields. Using
imaginary-time ... | cond-mat_str-el |
Lock-in of a Chiral Soliton Lattice by Itinerant Electrons: Chiral magnets often show intriguing magnetic and transport properties
associated with their peculiar spin textures. A typical example is a chiral
soliton lattice, which is found in monoaxial chiral magnets, such as
CrNb$_3$S$_6$ and Yb(Ni$_{1-x}$Cu$_x$)$_3$Al... | cond-mat_str-el |
Recent Progress of Point Contact Spectroscopy as a Probe of Correlated
Electron States: We review recent progress in point contact spectroscopy (PCS) to extract
spectroscopic information out of correlated electron materials, with the
emphasis on non-superconducting states. PCS has been used to detect bosonic
excitati... | cond-mat_str-el |
Magnetic Structure and Spin Fluctuations in Colossal Magnetoresistance
Ferrimagnet Mn3Si2Te6: The ferrimagnetic insulator Mn3Si2Te6, which features a Curie temperature Tc
at 78 K and a delicate yet consequential magnetic frustration, exhibits
colossal magnetoresistance (CMR) when the magnetic field is applied along t... | cond-mat_str-el |
Kondo and anti-Kondo coupling to local moments in EuB$_6$: With a treatment of the 4$f$ states of EuB$_6$ based on LDA+U method, the
mixing of Eu $f$ states with B $p$ states around the X point of the Brillouin
zone is shown to have unexpected consequences for the effective exchange
interactions. We analyze in detail t... | cond-mat_str-el |
Optical studies of Cr$^{3+}$-Cr$^{2+}$ pair center in KZnF$_{3}$ crystal: Optical absorption spectra of Cr$^{3+}$-Cr$^{2+}$ pair center in
KZnF$_{3}$:Cr$^{3+}$,Cr$^{2+}$ crystal were investigated in wide temperature
range. Broad band at 30800 cm$^{-1}$ is attributed to cation-cation
(e_g)-electron transfer transition. ... | cond-mat_str-el |
Quantum Mott Transition and Multi-Furcating Criticality: Phenomenological theory of the Mott transition is presented. When the
critical temperature of the Mott transition is much higher than the quantum
degeneracy temperature, the transition is essentially described by the Ising
universality class. Below the critical t... | cond-mat_str-el |
Spatio-temporal dynamics of quantum-well excitons: We investigate the lateral transport of excitons in ZnSe quantum wells by
using time-resolved micro-photoluminescence enhanced by the introduction of a
solid immersion lens. The spatial and temporal resolutions are 200 nm and 5 ps,
respectively. Strong deviation from c... | cond-mat_str-el |
Low-temperature spin Coulomb drag in a two-dimensional electron gas: The phenomenon of low-temperature spin Coulomb drag in a two-dimensional
electron gas is investigated. The spin transresistivity coefficient is
essentially enhanced in the diffusive regime, as compared to conventional
predictions. The origin of this e... | cond-mat_str-el |
Energy Scale Deformation on Regular Polyhedra: A variant of energy scale deformation is considered for the S = 1/2
antiferromagnetic Heisenberg model on polyhedra. The deformation is induced by
the perturbations to the uniform Hamiltonian, whose coefficients are determined
by the bond coordinates. On the tetrahedral, o... | cond-mat_str-el |
A generalization of the injectivity condition for Projected Entangled
Pair States: We introduce a family of tensor network states that we term semi-injective
Projected Entangled-Pair States (PEPS). They extend the class of injective PEPS
and include other states, like the ground states of the AKLT and the CZX models
... | cond-mat_str-el |
Quantitative functional renormalization for three-dimensional quantum
Heisenberg models: We employ a recently developed variant of the functional renormalization
group method for spin systems, the so-called pseudo Majorana functional
renormalization group, to investigate three-dimensional spin-1/2 Heisenberg
models a... | cond-mat_str-el |
Quantum critical point in the spin glass-antiferromagnetism competition
in Kondo-lattice systems: A theory is proposed to describe the competition among antiferromagnetism
(AF), spin glass (SG) and Kondo effect. The model describes two Kondo
sublattices with an intrasite Kondo interaction strength $J_{K}$ and an
inte... | cond-mat_str-el |
Giant Magnetoresistance in Hubbard Chains: We use numerically unbiased methods to show that the one-dimensional Hubbard
model with periodically distributed on-site interactions already contains the
minimal ingredients to display the phenomenon of magnetoresistance; i.e., by
applying an external magnetic field, a dramat... | cond-mat_str-el |
A simple metal-insulator criterion for the doped Mott-Hubbard materials: We derived a simple metal-insulator criterion in analytical form for the
doped Mott-Hubbard materials. Its readings closely related to the orbital and
spin nature of the ground states of the unit cell. The available criterion
readings (metal or in... | cond-mat_str-el |
A Primer on Weyl Semimetals: Down the Discovery of Topological Phases: Recently discovered Weyl semimetals (WSM) have found special place in
topological condensed matter studies for they represent first example of
massless Weyl fermions found in condensed matter systems. A WSM shows gapless
bulk energy spectra with Dir... | cond-mat_str-el |
Photo-Induced Dynamics in Charge-Frustrated Systems: Photo-excited charge dynamics of interacting charge-frustrated systems are
studied using a spinless fermion model on an anisotropic triangular lattice.
Real-time evolution of the system after irradiating a pump-photon pulse is
analyzed by the exact diagonalization me... | cond-mat_str-el |
Effect of screening of the electron-phonon interaction on mass
renormalization and optical conductivity of the Extended Holstein model
polarons: An interacting electron-phonon system is considered within the Extended
Holstein model at strong coupling regime and nonadiabatic approximation. It is
assumed that screeni... | cond-mat_str-el |
Terahertz-Light Driven Coupling of Antiferromagnetic Spins to Lattice: Understanding spin-lattice coupling represents a key challenge in modern
condensed matter physics, with crucial importance and implications for
ultrafast and 2D-magnetism. The efficiency of angular momentum and energy
transfer between spins and the ... | cond-mat_str-el |
Anderson localization of spinons in a spin-1/2 antiferromagnetic
Heisenberg chain: Anderson localization is a general phenomenon of wave physics, which stems
from the interference between multiple scattering paths1,2. It was originally
proposed for electrons in a crystal, but later was also observed for light3-5,
mic... | cond-mat_str-el |
Antiferromagnetic structure of alkali metal superoxide CsO$_2$: We have performed a powder neutron diffraction study on CsO$_2$, where the
unpaired electron with $s=1/2$ in the $\pi^*$ orbital of the O$_2^-$ ion is
responsible for the magnetism. The magnetic reflections 0 $\frac{1}{2}$ 0 and 0
$\frac{1}{2}$ 1 were obse... | cond-mat_str-el |
Hund's coupling driven interorbital entanglement in orbital-selective
Mott phase: We examine the orbital-selective Mott transition in the non-hybridized
two-band Hubbard model using the dynamical mean-field theory. We find that the
orbital-selective Mott transition could be depicted by the local quantum state
fidelit... | cond-mat_str-el |
Wannier Permanent Wave Functions and Featureless Bosonic Mott Insulators
on the 1/3 filled Kagome Lattice: We study Bose-Hubbard models on tight-binding, non-Bravais lattices, with a
filling of one boson per unit cell -- and thus fractional site filling. At
integer filling of a unit cell neither symmetry breaking nor... | cond-mat_str-el |
Quantum Hall Charge Kondo Criticality: The long-thought charge Kondo effects have recently been experimentally
realized in the quantum Hall regime. This experiment, supported by numerics,
exemplifies the realization of two-channel Kondo state, a non-Fermi Liquid, and
its crossover to the one-channel counterpart, a Ferm... | cond-mat_str-el |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.