id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
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cond-mat/9305042 | Solutions to the Multi-Component 1/R Hubbard Model | In this work we introduce one dimensional multi-component Hubbard model of
1/r hopping and U on-site energy. The wavefunctions, the spectrum and the
thermodynamics are studied for this model in the strong interaction limit
$U=\infty$. In this limit, the system is a special example of $SU(N)$ Luttinger
liquids, exhibiti... | 1993-05-31 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | D. F. Wang |
cond-mat/9305040 | Exclusive Many-Particle Diffusion in Disordered Media and Correlation
Functions for Random Vertex Models | We consider systems of particles hopping stochastically on $d$-dimensional
lattices with space-dependent probabilities. We map the master equation onto an
evolution equation in a Fock space where the dynamics are given by a quantum
Hamiltonian (continuous time) or a transfer matrix resp. (discrete time). We
show that u... | 1993-05-29 | 2007-05-23 | [
"cond-mat"
] | Gunter Schuetz and Sven Sandow |
cond-mat/9305041 | Gutzwiller-Jastrow Wavefunctions for the $1/r$ Hubbard Model | In this work, we study the wavefunctions of the one dimensional $1/r$ Hubbard
model in the strong interaction limit $U =\infty$. A set of Gutzwiller-Jastorw
wavefunctions are shown to be eigen-functions of the Hamiltonian. The entire
excitation spectrum and the thermodynamics are also studied in terms of more
generaliz... | 1993-05-29 | 2019-08-15 | [
"cond-mat",
"hep-th"
] | D. F. Wang Joseph Henry (Laboratories of Physics, Princeton
University, Princeton, New Jersey) Q. F. Zhong (International School for
Advanced Study Via Beirut 4, 34014 Trieste, Italy) P. Coleman Serin (Physics
Laboratory, Rutgers University, Piscataway, NJ) |
cond-mat/9305036 | Cluster Variation Approach to the Random-Anisotropy
Blume-Emery-Griffiths Model | The random--anisotropy Blume--Emery--Griffiths model, which has been proposed
to describe the critical behavior of $^3$He--$^4$He mixtures in a porous
medium, is studied in the pair approximation of the cluster variation method
extended to disordered systems. Several new features, with respect to mean
field theory, are... | 1993-05-28 | 2009-10-22 | [
"cond-mat"
] | C. Buzano, A. Maritan and A. Pelizzola |
cond-mat/9305037 | Predictions for Impurity-Induced Tc Suppression in the High-Temperature
Superconductors | We address the question of whether anisotropic superconductivity is
compatible with the evidently weak sensitivity of the critical temperature Tc
to sample quality in the high-Tc copper oxides. We examine this issue
quantitatively by solving the strong-coupling Eliashberg equations numerically
as well as analytically f... | 1993-05-28 | 2009-10-22 | [
"cond-mat"
] | R. J. Radtke, K. Levin, H.-B. Schuttler, and M. R. Norman |
cond-mat/9305039 | Helicity Modulus and Meissner Effect in a Fluctuating Type II
Superconductor | The helicity modulus for a fluctuating type II superconductor is computed
within the elastic medium approximation, as a probe of superconducting phase
coherence and the Meissner effect in the mixed state. We argue that at the
vortex line lattice melting transition, there remains superconducting coherence
parallel to th... | 1993-05-28 | 2009-10-22 | [
"cond-mat"
] | Tao Chen and S. Teitel |
cond-mat/9305038 | Role of Van Hove Singularities and Momentum Space Structure in
High-Temperature Superconductivity | There is a great deal of interest in attributing the high critical
temperatures of the cuprates to either the proximity of the Fermi level to a
van Hove singularity or to structure of the superconducting pairing potential
in momentum space far from the Fermi surface. We examine these ideas by
calculating the critical t... | 1993-05-28 | 2009-10-22 | [
"cond-mat"
] | R. J. Radtke, K. Levin, H.-B. Schuttler, and M. R. Norman |
cond-mat/9305035 | Closed Abrikosov Vortices in a Superconducting Cylinder | The new type of solutions of the London equation for type-II superconductors
is obtained to describe the ring-shaped (toroidal) Abrikosov vortices. The
specific feature of these solutions is the self-consistent localization of both
the supercurrent and the magnetic field, enabling one to construct compact
magnetic stru... | 1993-05-27 | 2009-11-29 | [
"cond-mat"
] | V. A. Kozlov and A. V. Samokhvalov |
cond-mat/9305033 | Possibilities and Limitations of Gaussian Closure Approximations for
Phase Ordering Dynamics | The nonlinear equations describing phase ordering dynamics can be closed by
assuming the existence of an underlying Gaussian stochastic field which is
nonlinearly related to the observable order parameter field. We discuss the
relation between different implementations of the Gaussian assumption and
consider the limita... | 1993-05-27 | 2009-10-22 | [
"cond-mat"
] | C. Yeung, Y. Oono and A. Shinozaki |
cond-mat/9305034 | Wigner Molecules in Nanostructures | The one-- and two-- particle densities of up to four interacting electrons
with spin, confined within a quasi one--dimensional ``quantum dot'' are
calculated by numerical diagonalization. The transition from a dense
homogeneous charge distribution to a dilute localized Wigner--type electron
arrangement is investigated.... | 1993-05-27 | 2009-10-22 | [
"cond-mat"
] | K. Jauregui, W. Haeusler and B. Kramer, PTB Braunschweig |
cond-mat/9305032 | Effects of Columnar Pins on Flux Line Dynamics | The effects of columnar pins on the flux lines in a model High-Tc
superconductor in an applied field are studied through Monte Carlo simulations.
An analytic solution for a single line case is obtained and compared with the
simulation results. By introducing a tilted potential, we study simulated ``IV"
characteristics ... | 1993-05-26 | 2009-10-22 | [
"cond-mat"
] | Seungoh Ryu, A. Kapitulnik and S. Doniach |
cond-mat/9305031 | Superconductivity in the Anderson Lattice | Using an anisotropic hybridization matrix element, V($\vec k$), reflecting
cubic symmetry at the ``rare-earth'' sites of the infinite U Anderson lattice,
we calculate the bare quasiparticle scattering amplitude to order 1/N using
slave Bosons and find significant differences with previous results under
spherical symmet... | 1993-05-25 | 2007-05-23 | [
"cond-mat"
] | B. R. Trees and D. L. Cox |
cond-mat/9305030 | Annihilation of Immobile Reactants on the Bethe Lattice | Two-particle annihilation reaction, A+A -> inert, for immobile reactants on
the Bethe lattice is solved exactly for the initially random distribution. The
process reaches an absorbing state in which no nearest-neighbor reactants are
left. The approach of the concentration to the limiting value is exponential.
The solut... | 1993-05-25 | 2010-10-12 | [
"cond-mat"
] | Satya N. Majumdar and Vladimir Privman |
cond-mat/9305029 | The Solid-on-Solid Surface Width Around the Roughening Transition | We investigate the surface width $W$ of solid-on-solid surfaces in the
vicinity of the roughening temperature $T_r$. Above $T_r$, $W^2$ is expected to
diverge with the system size $L$ like $\ln L$. However, close to $T_r$ a clean
$\ln{L}$ behavior can only be seen on extremely large lattices. Starting from
the Kosterli... | 1993-05-24 | 2007-05-23 | [
"cond-mat",
"hep-lat"
] | H.G. Evertz, M. Hasenbusch, M. Marcu and K. Pinn |
cond-mat/9305027 | Reconstruction Mechanism of FCC Transition-Metal (001) Surfaces | The reconstruction mechanism of (001) fcc transition metal surfaces is
investigated using a full-potential all-electron electronic structure method
within density-functional theory. Total-energy supercell calculations confirm
the experimental finding that a close-packed quasi-hexagonal overlayer
reconstruction is possi... | 1993-05-24 | 2009-10-22 | [
"cond-mat"
] | Vincenzo Fiorentini, Michael Methfessel, and Matthias Scheffler
(Fritz-Haber-Institut der MPG, Berlin, Germany) |
cond-mat/9305028 | Asymptotically exact mean field theory for the Anderson model including
double occupancy | The Anderson impurity model for finite values of the Coulomb repulsion $U$ is
studied using a slave boson representation for the empty and doubly occupied
$f$-level. In order to avoid well known problems with a naive mean field theory
for the boson fields, we use the coherent state path integral representation to
first... | 1993-05-24 | 2009-10-22 | [
"cond-mat"
] | J. Holm, R. Kree and K. Sch\"onhammer |
cond-mat/9305026 | Ferromagnetism in the Hubbard Model-- Examples from Models with
Degenerate Single-Electron Ground States | Whether spin-independent Coulomb interaction can be the origin of a realistic
ferromagnetism in an itinerant electron system has been an open problem for a
long time. Here we study a class of Hubbard models on decorated lattices, which
have a special property that the corresponding single-electron Schr\"{o}dinger
equat... | 1993-05-24 | 2009-10-22 | [
"cond-mat"
] | Andreas Mielke and Hal Tasaki |
cond-mat/9305025 | Vortex Line Fluctuations in Superconductors from Elementary Quantum
Mechanics | Concepts from elementary quantum mechanics can be used to understand vortex
line fluctuations in high-temperature superconductors. Flux lines are
essentially classical objects, described by a string tension, their mutual
repulsion, and interactions with pinning centers. The classical partition
function, however, is iso... | 1993-05-21 | 2007-05-23 | [
"cond-mat"
] | David R. Nelson |
cond-mat/9305024 | Theories for v=1/2 in Single- and Double-Layer Systems | Recent experiments have shown that a quantized Hall plateau can occur in
double layer systems at total filling factor v=1/2, though there is no plateau
at v=1/2 in a normal single layer system. For the single layer system,
considerable insight has been provided by a theory based on the fermion
Chern-Simons picture, whe... | 1993-05-20 | 2009-10-22 | [
"cond-mat"
] | Bertrand I. Halperin |
cond-mat/9305022 | Spectral sum rules for the Tomonaga-Luttinger model | In connection with recent publications we discuss spectral sum rules for the
Tomonaga-Luttinger model without using the explicit result for the one-electron
Green's function. They are usefull in the interpretation of recent high
resolution photoemission spectra of quasi-one-dimensional conductors. It is
shown that the ... | 1993-05-19 | 2009-10-22 | [
"cond-mat"
] | K. Sch\"onhammer and V. Meden |
cond-mat/9305021 | Quasi-Fermi Distribution and Resonant Tunneling of Quasiparticles with
Fractional Charges | We study the resonant tunneling of quasiparticles through an impurity between
the edges of a Fractional Quantum Hall sample. We show that the one-particle
momentum distribution of fractionally charged edge quasiparticles has a
quasi-Fermi character. The density of states near the quasi-Fermi energy at
zero temperature ... | 1993-05-19 | 2009-10-22 | [
"cond-mat"
] | V.L. Pokrovsky and L.P. Pryadko |
cond-mat/9305023 | Avalanches and the Renormalization Group for Pinned Charge-Density Waves | The critical behavior of charge-density waves (CDWs) in the pinned phase is
studied for applied fields increasing toward the threshold field, using
recently developed renormalization group techniques and simulations of
automaton models. Despite the existence of many metastable states in the pinned
state of the CDW, the... | 1993-05-19 | 2009-10-22 | [
"cond-mat"
] | O. Narayan and A. Alan Middleton |
cond-mat/9305018 | Spin-Flavor Separation and Non-Fermi Liquid Behavior in the Multichannel
Kondo Problem: A Large N Approach | We consider a $SU(N)\times SU(M)$ generalization of the multichannel
single-impurity Kondo model which we solve analytically in the limit
$N\rightarrow \infty$, $M\rightarrow\infty$, with $\gamma=M/N$ fixed. Non-Fermi
liquid behavior of the single electron Green function and of the local spin and
flavor susceptibilitie... | 1993-05-18 | 2009-10-22 | [
"cond-mat"
] | Daniel L. Cox and Andrei E. Ruckenstein |
cond-mat/9305020 | Critical Behaviour of the 3D XY-Model: A Monte Carlo Study | We present the results of a study of the three-dimensional $XY$-model on a
simple cubic lattice using the single cluster updating algorithm combined with
improved estimators. We have measured the susceptibility and the correlation
length for various couplings in the high temperature phase on lattices of size
up to $L=1... | 1993-05-18 | 2009-10-22 | [
"cond-mat",
"hep-lat"
] | A.P.Gottlob and M.Hasenbusch |
cond-mat/9305015 | Anyons on Higher Genus Surfaces - a Constructive Approach | We reconsider the problem of anyons on higher genus surfaces by embedding
them in three dimensional space. From a concrete realization based on three
dimensional flux tubes bound to charges moving on the surface, we explicitly
derive all the representations of the spinning braid group. The component
structure of the wa... | 1993-05-17 | 2009-10-22 | [
"cond-mat"
] | T. H. Hansson, Anders Karlhede and Erik Westerberg |
cond-mat/9305016 | Structural Properties of Two-Dimensional Polymers | We present structural properties of two-dimensional polymers as far as they
can be described by percolation theory. The percolation threshold, critical
exponents and fractal dimensions of clusters are determined by computer
simulation and compared to the results of percolation theory. We also describe
the dependence of... | 1993-05-17 | 2009-10-22 | [
"cond-mat"
] | Christian Muenkel and Dieter W. Heermann |
cond-mat/9305019 | Vertex Models and Quantum Spin Systems: a nonlocal approach | Within a general cluster framework, we discuss the loop-algorithm, a new type
of cluster algorithm that reduces critical slowing down in vertex models and in
quantum spin systems. We cover the example of the 6-vertex model in detail. For
the F-model, we present numerical results that demonstrate the effectiveness of
th... | 1993-05-17 | 2007-05-23 | [
"cond-mat",
"hep-lat"
] | H.G. Evertz and M. Marcu |
cond-mat/9305017 | Odd Frequency Pairing in the Kondo Lattice | We discuss the possibility that heavy fermion superconductors involve
odd-frequency pairing of the kind first considered by Berezinskii. Using a toy
model for odd frequency triplet pairing in the Kondo lattice we are able to
examine key properties of this new type of paired state. To make progress
treating the strong $... | 1993-05-17 | 2009-10-22 | [
"cond-mat"
] | P. Coleman, E. Miranda and A. Tsvelik |
cond-mat/9305011 | Two-Dimensional Vortex Lattice Melting | We report on a Monte-Carlo study of two-dimensional Ginzburg-Landau
superconductors in a magnetic field which finds clear evidence for a
first-order phase transition characterized by broken translational symmetry of
the superfluid density. A key aspect of our study is the introduction of a
quantity proportional to the ... | 1993-05-14 | 2009-10-22 | [
"cond-mat"
] | Jun Hu and A.H. MacDonald |
cond-mat/9305013 | Elastic anomaly of heavy fermion systems in a crystalline field | An elastic anomaly, observed in the heavy fermi liquid state of Ce alloys
(for example, CeCu$_6$ and CeTe), is analyzed by using the infinite-$U$
Anderson lattice model. The four atomic energy levels are assumed for
f-electrons. Two of them are mutually degenerate. A small crystalline splitting
$2\Delta$ is assumed bet... | 1993-05-14 | 2007-05-23 | [
"cond-mat"
] | Kikuo Harigaya and G. A. Gehring (Department of Physics, University of
Sheffield, Sheffield, United Kingdom) |
cond-mat/9305012 | Orbits in one-dimensional finite linear cellular automata | Periodicity and relaxation are investigated for the trajectories of the
states in one-dimensional finite cellular automata with rule-90 and 150. The
time evolutions are described with matrices. Eigenvalue analysis is applied to
clarify the maximum value of period and relaxation. | 1993-05-14 | 2009-10-22 | [
"cond-mat"
] | Shin-ichi Tadaki |
cond-mat/9305014 | Renormalization of Chiral Couplings in Tilted Bilayer Membranes | We study the effects of chiral constituent molecules on the macroscopic
shapes attained by lipid bilayer membranes. Such fluid membranes are beautiful
examples of statistical ensembles of random shapes, sometimes coupled to
in-plane order. We analyze them with methods of continuum elasticity theory,
generalizing the we... | 1993-05-14 | 2008-02-03 | [
"cond-mat",
"hep-th"
] | P. Nelson, T. Powers |
cond-mat/9305009 | Anisotropic Electron Coupling as a Phenomenological Model for
High-Temperature Superconductors | A three-dimensional weak coupling BCS model with an {\it anisotropic} pairing
interaction in momentum space is reported. It exhibits an anisotropic gap in
accord with recent experimental observations for high-$T_c$ oxides. The gap
ratio ${2 \Delta / k_B T_c }$ is calculated as function of the anisotropy ratio
of the el... | 1993-05-13 | 2009-10-22 | [
"cond-mat"
] | K. Langfeld, E. Frey |
cond-mat/9305010 | A Numerical Transfer-Matrix Study of Surface-Tension Anisotropy in Ising
Models on Square and Cubic Lattices | We compute by numerical transfer-matrix methods the surface free energy
$\tau(T),$ the surface stiffness coefficient $\kappa(T),$ and the single-step
free energy $s(T)$ for Ising ferromagnets with $(\infty \times L)$
square-lattice and $(\infty \times L \times M)$ cubic-lattice geometries, into
which an interface is in... | 1993-05-13 | 2009-10-22 | [
"cond-mat",
"hep-lat"
] | Howard L. Richards, M. A. Novotny, and Per Arne Rikvold |
cond-mat/9305008 | Hunds Rule Theory for Heavy Fermion Superconductors | In this paper, a generalization of standard spin fluctuation theory is
considered which takes into account orbital degeneracy effects which are
critical for describing f electrons. This theory leads to an instability for a
superconducting pair state which obeys Hunds rules. Such a state has L=5, S=1,
and J=4. The degen... | 1993-05-12 | 2009-10-22 | [
"cond-mat"
] | M. R. Norman |
cond-mat/9305005 | Antiferromagnetic symmetry breaking in the half filled Hubbard model in
infinite dimensions | We study the half filled Hubbard model on a hypercubic lattice in infinite
dimensions in the presence of a staggered magnetic field. An exact
Ward-identity between vertex functions and self-energies is derived, that holds
in any phase without broken symmetry for all values of $U$. Making the
reasonable assumptions that... | 1993-05-11 | 2009-10-22 | [
"cond-mat"
] | Peter Kopietz |
cond-mat/9305007 | Electronic Structure and Bonding in Epitaxially Stabilized Cubic Iron
Silicides | We present an ab initio full-potential linearized augmented plane-wave
(FLAPW) study of the structural and electronic properties of the two bulk
unstable compounds FeSi (CsCl structure) and FeSi$_2$ (CaF$_2$ structure) which
have recently been grown by molecular beam epitaxy on Si(111). We obtain
equilibrium bulk latti... | 1993-05-11 | 2007-05-23 | [
"cond-mat"
] | K. A. Mader, H. von Kanel, and A. Baldereschi |
cond-mat/9305006 | Theory of Photoluminescence from a Magnetic Field Induced
Two-dimensional Quantum Wigner Crystal | We develop a theory of photoluminescence using a time-dependent Hartree-Fock
approximation that is appropriate for the two-dimensional Wigner crystal in a
strong magnetic field. The cases of localized and itinerant holes are both
studied. It is found that the photoluminescence spectrum is a weighted measure
of the sing... | 1993-05-11 | 2009-10-22 | [
"cond-mat"
] | Dong-Zi Liu, H.A. Fertig and S. Das Sarma |
cond-mat/9305004 | Dilution Effects on Ordering in the ${S=1/2}$ Heisenberg Antiferromagnet
on the Square Lattice | The influence of dilution with non--magnetic impurities on the order in the
ground state of the $S=1/2$ Heisenberg antiferromagnet is investigated by
Quantum Monte Carlo simulations. Data of the spin correlation functions and
thermodynamic properties for system sizes up to $L\times L=16\times16$ and for
impurity concen... | 1993-05-10 | 2007-05-23 | [
"cond-mat"
] | J. Behre and S. Miyashita |
cond-mat/9305003 | Performance of Random Lattice Algorithms | We have implemented different algorithms for generating Poissonian and
vectorizable random lattices. The random lattices fulfil the Voronoi/Delaunay
construction. We measure the performance of our algorithms for the two types of
random lattices and find that the average computation time is proportional to
the number of... | 1993-05-05 | 2015-06-25 | [
"cond-mat",
"hep-lat"
] | K. B. Lauritsen, H. Puhl and H.-J. Tillemans |
cond-mat/9305002 | One Dimensional Oxygen Ordering in YBa2Cu3O(7-delta) | A model consisting of oxygen-occupied and -vacant chains is considered, with
repulsive first and second nearest-neighbor interactions V1 and V2,
respectively. The statistical mechanics and the diffraction spectrum of the
model is solved exactly and analytically with the only assumption V1 >> V2. At
temperatures T ~ V1 ... | 1993-05-04 | 2009-10-22 | [
"cond-mat"
] | A.A. Aligia |
cond-mat/9305001 | One-dimensional asymmetrically coupled maps with defects | In this letter we study chaotic dynamical properties of an asymmetrically
coupled one-dimensional chain of maps. We discuss the existence of coherent
regions in terms of the presence of defects along the chain. We find out that
temporal chaos is instantaneously localized around one single defect and that
the tangent ve... | 1993-05-03 | 2009-10-22 | [
"cond-mat"
] | L Biferale, A Crisanti, M Falcioni, A Vulpiani |
cond-mat/9304049 | A Renormalization Group Study of Helimagnets in D=2+EPSILON Dimensions | We study a non linear sigma model $O(N)\otimes O(2)/O(N-2)\otimes O(2)$
describing the phase transition of N-components helimagnets up to two loop
order in $D=2+\epsilon$ dimensions. It is shown that a stable fixed point
exists as soon as $N$ is greater than 3 (or equal). In the N=3 case, the
symmetry of the system is ... | 1993-04-30 | 2010-03-25 | [
"cond-mat"
] | P. Azaria, B. Delamotte, F. Delduc and Th. Jolicoeur |
cond-mat/9304048 | Instantaneous Configurations of the Bloch Walls in a Two-Dimensional and
s=1/2 Model | We show that instantaneous configurations of 180 degree domain walls
constructed on a square lattice in a two-dimensional and S=1/2 Ising-type model
exhibit fractal structure. The fractal dimension depends on the coupling
parameters and it is a continious function of the temperature. The wall
thickness in the neighbour... | 1993-04-30 | 2009-10-22 | [
"cond-mat"
] | Z. Neda |
cond-mat/9304047 | Real-space renormalization group for the random-field Ising model | We present real--space renormalization group (RG) calculations of the
critical properties of the random--field Ising model on a cubic lattice in
three dimensions. We calculate the RG flows in a two--parameter truncation of
the Hamiltonian space. As predicted, the transition at finite randomness is
controlled by a zero ... | 1993-04-29 | 2009-10-22 | [
"cond-mat"
] | M. E. J. Newman, B. W. Roberts, G. T. Barkema, and J. P. Sethna |
cond-mat/9304050 | Impurity systems fluctuating between two magnetic configurations:
candidates for non Fermi-liquid behavior | The appropriate generalization of the isotropic impurity Anderson model for
valence fluctuations between two magnetic multiplets $l^n$ and $l^{n+1}$ is
solved in the strong-coupling limit of Wilson's renormalization group for
$l\leq$ 3. Except in the extreme case of $j-j$ coupling, the ground state is
degenerate, the i... | 1993-04-29 | 2007-05-23 | [
"cond-mat"
] | A.A. Aligia and M. Balina |
cond-mat/9304045 | Mode-Matching Technique for Transmission Calculations in Electron
Waveguides at High Magnetic Fields | In this paper we present a mode-matching technique to study the transmission
coefficient of mesoscopic devices such as electron waveguides in the presence
of high magnetic fields for different situations. A detailed study of the
difficulties rising due to the presence of the magnetic field is given and the
differences ... | 1993-04-27 | 2009-10-22 | [
"cond-mat"
] | J. J. Palacios and C. Tejedor |
cond-mat/9304046 | Theory of Two-Dimensional Quantum Heisenberg Antiferromagnets with a
Nearly Critical Ground State | We present the general theory of clean, two-dimensional, quantum Heisenberg
antiferromagnets which are close to the zero-temperature quantum transition
between ground states with and without long-range N\'{e}el order. For
N\'{e}el-ordered states, `nearly-critical' means that the ground state
spin-stiffness, $\rho_s$, s... | 1993-04-27 | 2009-10-22 | [
"cond-mat"
] | Andrey V. Chubukov, Subir Sachdev and Jinwu Ye |
cond-mat/9304044 | Bound states of holes in an antiferromagnet | The formation of bound states of holes in an antiferromagnetic spin-1/2
background is studied using numerical techniques applied to the ${\rm t-J}$
Hamiltonian on clusters with up to 26 sites. An analysis of the binding energy
as a function of cluster size suggests that a two hole bound state is formed
for couplings la... | 1993-04-26 | 2009-10-22 | [
"cond-mat"
] | D. Poilblanc, J. Riera and E. Dagotto |
cond-mat/9304043 | A Mean Field Theory for the Quantum Hall Liquid. II --- The Vortex
Solution | In the Fractional Quantum Hall state, we introduce a bi-local mean field and
get vortex mean field solutions. Rotational invariance is imposed and the
solution is constructed by means of numerical self-consistent method. It is
shown that vortex has a fractional charge, a fractional angular momentum and a
magnetic field... | 1993-04-26 | 2017-02-01 | [
"cond-mat",
"hep-th"
] | Kenzo Ishikawa and Nobuki Maeda |
cond-mat/9304042 | Polaron Excitations in Doped C60: Effects of Disorders | Effects on C$_{60}$ by thermal fluctuations of phonons, misalignment of
C$_{60}$ molecules in a crystal, and other intercalated impurities (remaining
C$_{70}$, oxygens, and so on) are simulated by disorder potentials. The
Su-Schrieffer-Heeger--type electron-phonon model for doped C$_{60}$ is solved
with gaussian bond d... | 1993-04-25 | 2007-05-23 | [
"cond-mat"
] | Kikuo Harigaya (Department of Physics, University of Sheffield, United
Kingdom, and Fundamental Physics Section, Physical Science Division,
Electrotechnical Laboratory, Umezono, Tsukuba, Ibaraki, Japan) |
cond-mat/9304041 | Magnetic Field Behaviour of a Haldane Gap Antiferromagnet | We investigate the magnetic field behaviour of an antiferromagnetic
Heisenberg spin-1 chain with the most general single-ion anisotropy. We discuss
the regime in which the magnetic field is below the transition value. The
splitting of the Haldane triplet is obtained as a function of a field applied
in an arbitrary orie... | 1993-04-24 | 2009-10-22 | [
"cond-mat"
] | O. Golinelli, Th. Jolicoeur and R. Lacaze |
cond-mat/9304040 | Impurity-Bond Effect on the Spin-1 Antiferromagnetic Heisenberg Chain | Low-lying excited states of the spin-1 antiferromagnetic Heisenberg chain
with an impurity bond are investigated in terms of domain-wall excitations by
means of analytical methods as well as a method of numerical diagonalization.
It is shown that 1) the impurity bond brings about a massive triplet mode in
the Haldane g... | 1993-04-23 | 2009-10-22 | [
"cond-mat"
] | Makoto Kaburagi, Isao Harada and Takashi Tonegawa |
cond-mat/9304038 | Correlation Effects on Transport Through Few-Electrons Systems | We study lateral tunneling through a quantum box including electron-electron
interactions in the presence of a magnetic field which breaks single particle
degeneracies. The conductance at zero temperature as a function of the Fermi
energy in the leads consists of a set of peaks related to changing by one the
electron o... | 1993-04-23 | 2009-10-22 | [
"cond-mat"
] | J. J. Palacios, L. Martin-Moreno, and C. Tejedor |
cond-mat/9304039 | Phase Separation of Edge States in the Integer Quantum Hall Regime | Coulomb effects on the edge states of a two dimensional electron gas in the
presence of a high magnetic field are studied for different widths of the
boundaries. Schr\"odinger and Poisson equations are selfconsistently solved in
the integer Quantum Hall regime. Regions of flat bands at the Fermi level
appear for smooth... | 1993-04-23 | 2009-10-22 | [
"cond-mat"
] | L. Brey, J. J. Palacios, and C. Tejedor |
cond-mat/9304037 | Haldane fractional statistics in the fractional quantum Hall effect | We have tested Haldane's ``fractional-Pauli-principle'' description of
excitations around the $\nu = 1/3$ state in the FQHE, using exact results for
small systems of electrons. We find that Haldane's prediction $\beta = \pm 1/m$
for quasiholes and quasiparticles, respectively, describes our results well
with the modifi... | 1993-04-22 | 2009-10-22 | [
"cond-mat"
] | M.D. Johnson and G.S. Canright |
cond-mat/9304036 | Self-Consistent Electron Subbands of Gaas/Algaas Heterostructure in
Magnetic Fields Parallel to the Interface | The effect of strong magnetic fields parallel to GaAs/AlGaAs interface on the
subband structure of a 2D electron layer is ivestigated theoretically. The
system with two levels occupied in zero magnetic field is considered and the
magnetic field induced depletion of the second subband is studied. The
confining potential... | 1993-04-21 | 2009-10-22 | [
"cond-mat"
] | T.Jungwirth, L.Smrcka (Institute of Physics, ASCR, Prague,Czech
Republic) |
cond-mat/9304035 | Introduction to Conformal Invariance and its Applications to Critical
Phenomena | This is an introduction to conformal invariance and two-dimensional critical
phenomena for graduate students and condensed-matter physicists. After
explaining the algebraic foundations of conformal invariance, numerical methods
and their application to the Ising, Potts, Ashkin-Teller and XY models,
tricritical behaviou... | 1993-04-21 | 2009-10-22 | [
"cond-mat"
] | Philippe Christe and Malte Henkel |
cond-mat/9304033 | Exiton, Spinon and Spin Wave Modes in an Exactly Soluble One-Dimensional
Quantum Many-Body System | In this paper, we present the exact solution to a one-dimensional,
two-component, quantum many-body system in which like particles interact with a
pair potential $s(s+1)/{\rm sinh}^{2}(r)$, while unlike particles interact with
a pair potential $-s(s+1)/{\rm cosh}^{2}(r)$. We first give a proof of
integrability, then de... | 1993-04-20 | 2009-10-22 | [
"cond-mat"
] | Bill Sutherland and Rudolf A. R"omer |
cond-mat/9304034 | Solitons and 1/f Noise in Molecular Chains | Davydov's model of solitons in alpha-helix protein chains is shown to display
features of self-organized criticality (SOC), i.e., power law behaviour of
correlations in space and 1/f-noise, as a consequence of considering random
peptide group displacements from their (periodic) equilibrium positions along a
chain. This... | 1993-04-20 | 2009-10-22 | [
"cond-mat",
"q-bio"
] | H. Rosu and E. Canessa (ICTP-Trieste, Italy) |
cond-mat/9304031 | Kinks in the Kondo problem | We find the exact quasiparticle spectrum for the continuum Kondo problem of
$k$ species of electrons coupled to an impurity of spin $S$. In this
description, the impurity becomes an immobile quasiparticle sitting on the
boundary. The particles are ``kinks'', which can be thought of as field
configurations interpolating... | 1993-04-19 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Paul Fendley |
cond-mat/9304032 | Subharmonic Generation in Quantum Systems | We show how the classical-quantum correspondence permits long-lived
subharmonic motion in a quantum system driven by a periodic force.
Exponentially small deviations from exact subharmonicity are due to coherent
tunneling between quantized vortex tubes which surround classical elliptic
periodic orbits. | 1993-04-19 | 2009-10-22 | [
"cond-mat"
] | Martin Holthaus, Michael E. Flatte' |
cond-mat/9304030 | Localization of Growth Sites in DLA Clusters: Multifractality and
Multiscaling | The growth of a diffusion limited aggregation (DLA) cluster with mass $M$ and
radius of gyration $R$ is described by a set of growth probabilities $\{
p_i\}$, where $p_i$ is the probability that the perimeter site $i$ will be the
next to grow. We introduce the joint distribution $N(\alpha, x, M)$, where
$N(\alpha,x,M)d... | 1993-04-19 | 2009-10-22 | [
"cond-mat"
] | Jysoo Lee, Stefan Schwarzer, Antonio Coniglio and H. Eugene Stanely |
cond-mat/9304028 | Quantum transmission in disordered insulators: random matrix theory and
transverse localization | We consider quantum interferences of classically allowed or forbidden
electronic trajectories in disordered dielectrics. Without assuming a directed
path approximation, we represent a strongly disordered elastic scatterer by its
transmission matrix ${\bf t}$. We recall how the eigenvalue distribution of
${\bf t.t}^{\da... | 1993-04-16 | 2009-10-22 | [
"cond-mat"
] | Yshai Avishai, Jean-Louis Pichard, Khandker A. Muttalib |
cond-mat/9304029 | Conductance statistics in small insulating GaAs:Si wires at low
temperature. II. Experimental study | We have observed reproducible conductance fluctuations at low temperature in
a small GaAs:Si wire driven across the Anderson transition by the application
of a gate voltage. We analyse quantitatively the log-normal conductance
statistics in terms of truncated quantum fluctuations. Quantum fluctuations due
to small chan... | 1993-04-16 | 2009-10-22 | [
"cond-mat"
] | F. Ladieu, D. Mailly, M. Sanquer |
cond-mat/9304025 | Lack of self-average in weakly disordered one dimensional systems | We introduce a one dimensional disordered Ising model which at zero
temperature is characterized by a non-trivial, non-self-averaging, overlap
probability distribution when the impurity concentration vanishes in the
thermodynamic limit. The form of the distribution can be calculated
analytically for any realization of ... | 1993-04-16 | 2009-10-22 | [
"cond-mat"
] | A. Crisanti, G. Paladin, M. Serva, A. Vulpiani |
cond-mat/9304027 | Conductance statistics in small GaAs:Si wires at low temperatures. I.
Theoretical analysis: truncated quantum fluctuations in insulating wires | We analyse in detail Mott's variable range hopping in one dimension,
expanding on earlier work by Raikh and Ruzin. We show that the large
conductance fluctuations in disordered insulators result from a subtle
interplay between purely quantum phenomena and geometrical fluctuations arising
from the energies and locations... | 1993-04-16 | 2009-10-22 | [
"cond-mat"
] | Fran\c{c}ois Ladieu, Jean-Philippe Bouchaud |
cond-mat/9304024 | Variance Calculations and the Bessel Kernel | In the Laguerre ensemble of N x N (positive) hermitian matrices, it is of
interest both theoretically and for applications to quantum transport problems
to compute the variance of a linear statistic, denoted var_N f, as N->infinity.
Furthermore, this statistic often contains an additional parameter alpha for
which the ... | 1993-04-16 | 2009-07-11 | [
"cond-mat",
"hep-th",
"math-ph",
"math.MP",
"nlin.SI",
"solv-int"
] | Estelle L. Basor and Craig A. Tracy |
cond-mat/9304026 | Transition from regular to complex behaviour in a discrete deterministic
asymmetric neural network model | We study the long time behaviour of the transient before the collapse on the
periodic attractors of a discrete deterministic asymmetric neural networks
model. The system has a finite number of possible states so it is not possible
to use the term chaos in the usual sense of sensitive dependence on the initial
condition... | 1993-04-16 | 2009-10-22 | [
"cond-mat"
] | A. Crisanti, M falcioni, A. Vulpiani |
cond-mat/9304023 | Products of Random Matrices for Disordered Systems | Products of random transfer matrices are applied to low dimensional
disordered systems to evaluate numerically extensive quantities such as entropy
and overlap probability distribution. The main advantage is the possibility to
avoid numerical differentiation. The method works for arbitrary disorder
distributions at any... | 1993-04-15 | 2009-10-22 | [
"cond-mat"
] | A Crisanti, G Paladin, M Serva, A Vulpiani |
cond-mat/9304022 | Pairing on Small Clusters in the Peierls-Hubbard Model: Implications for
C$_{60}$ | We study the pairing within the Peierls-Hubbard Model for electron- and
hole-doped analogs of C$_{60}$ accessible to exact diagonalization techniques
(cube, truncated tetrahedron, {\it etc.}). We discuss how inclusion of
electron-phonon interactions can substantially modify the conclusions about
pairing obtained when t... | 1993-04-13 | 2007-05-23 | [
"cond-mat"
] | J. Tinka Gammel F. Guo, D. Guo, K.C. Ung, and S. Mazumdar |
cond-mat/9304020 | Dissociative Adsorption: A Solvable Model | A model of "hot"-dimer deposition in one dimension, introduced by Pereyra and
Albano, is modified to have an unbounded dissociation range. The resulting
dynamical equations are solved exactly. A related k-mer dissociation model is
also introduced and its solution obtained as a quadrature. | 1993-04-10 | 2010-10-12 | [
"cond-mat"
] | Vladimir Privman |
cond-mat/9304021 | Spontaneous Spin-Polarization of Ballistic Electrons in Single Mode
Quantum Wires due to Spin-Splitting | We show that a quantum wire device with spin splitting can work as an active
spin polarizer. Hot electrons in one `spin' subband (e.g. `spin-up') may pass
such a device with weak electron pair scattering, while electrons in the
opposite subband (`spin-down') may have high conversion probability into the
`spin-up' subba... | 1993-04-10 | 2009-10-22 | [
"cond-mat"
] | Gerhard Fasol and Hiroyuki Sakaki |
cond-mat/9304018 | Superconductivity in the Two-Band Hubbard Model in Infinite Dimensions | We study a two-band Hubbard model in the limit of infinite dimensions, using
a combination of analytical methods and Monte-Carlo techniques. The normal
state is found to display various metal to insulators transitions as a function
of doping and interaction strength. We derive self-consistent equations for the
local Gr... | 1993-04-09 | 2009-10-22 | [
"cond-mat"
] | Antoine Georges, Gabriel Kotliar, Werner Krauth |
cond-mat/9304019 | Intrinsic quasiparticle's spin and fractional quantum Hall effect on
Riemann surfaces | We derive the braid relations of the charged anyons interacting with a
magnetic field on Riemann surfaces. The braid relations are used to calculate
the quasiparticle's spin in the fractional quantum Hall states on Riemann
surfaces. The quasiparticle's spin is found to be topological independent and
satisfies physical ... | 1993-04-09 | 2015-06-25 | [
"cond-mat",
"hep-th"
] | Dingping Li |
cond-mat/9304011 | Slave Particle Studies of the Electron Momentum Distribution in the Low
Dimensional $t-J$ Model | The electron momentum distribution function in the $t-J$ model is studied in
the framework of slave particle approach. Within the decoupling scheme used in
the gauge field and related theories, we treat formally phase and amplitude
fluctuations as well as constraints without further approximations. Our result
indicates... | 1993-04-08 | 2009-10-22 | [
"cond-mat"
] | Shiping Feng, J. B. Wu, Z. B. Su, and L. Yu |
cond-mat/9304015 | Uniform Density Theorem for the Hubbard Model | A general class of hopping models on a finite bipartite lattice is
considered, including the Hubbard model and the Falicov-Kimball model. For the
half-filled band, the single-particle density matrix $\uprho (x,y)$ in the
ground state and in the canonical and grand canonical ensembles is shown to be
constant on the diag... | 1993-04-08 | 2009-10-22 | [
"cond-mat"
] | E.H. Lieb, M. Loss, R.J. McCann |
cond-mat/9304012 | Coulomb Gaps in a Strong Magnetic Field, S.-R | We report on a study of interaction effects in the tunneling
density-of-states of a disordered two-dimensional electron gas in the strong
magnetic field limit where only the lowest Landau level is occupied.
Interactions in the presence of disorder are accounted for by performing
finite-size self-consistent Hartree-Fock... | 1993-04-08 | 2007-05-23 | [
"cond-mat"
] | Eric Yang and A. H. MacDonald |
cond-mat/9304013 | Collective Transport in Arrays of Quantum Dots | (WORDS: QUANTUM DOTS, COLLECTIVE TRANSPORT, PHYSICAL EXAMPLE OF KPZ)
Collective charge transport is studied in one- and two-dimensional arrays of
small normal-metal dots separated by tunnel barriers. At temperatures well
below the charging energy of a dot, disorder leads to a threshold for
conduction which grows linear... | 1993-04-08 | 2009-10-22 | [
"cond-mat"
] | A. Alan Middleton and Ned S. Wingreen |
cond-mat/9304016 | Disordered Boson Systems: A Perturbative Study | A hard-core disordered boson system is mapped onto a quantum spin 1/2
XY-model with transverse random fields. It is then generalized to a system of
spins with an arbitrary magnitude S and studied through a 1/S expansion. The
first order 1/S expansion corresponds to a spin-wave theory. The effect of weak
disorder is stu... | 1993-04-08 | 2009-10-22 | [
"cond-mat"
] | Lizeng Zhang |
cond-mat/9304017 | Critical Exponents for Three-Dimensional Superfluid--Bose-Glass Phase
Transition | The critical phenomenon of the zero temperature superfluid--Bose-glass phase
transition for hard-core bosons on a three-dimensional disordered lattice is
studied using a quantum real-space renormalization-group method. The
correlation-length exponent $\nu$ and the dynamic exponent z are computed. The
critical exponent ... | 1993-04-08 | 2009-10-22 | [
"cond-mat"
] | Lizeng Zhang and Xiao-Qian Wang |
cond-mat/9304014 | Bosonization of the Low Energy Excitations of Fermi Liquids | We bosonize the low energy excitations of Fermi Liquids in any number of
dimensions in the limit of long wavelengths. The bosons are coherent
superposition of electron-hole pairs and are related with the displacement of
the Fermi Surface in some arbitrary direction. A coherent-state path integral
for the bosonized theo... | 1993-04-08 | 2009-10-22 | [
"cond-mat"
] | A.H.Castro Neto and Eduardo Fradkin |
cond-mat/9304008 | Cluster vs Single-Spin Algorithms -- Which are More Efficient? | A comparison between single-cluster and single-spin algorithms is made for
the Ising model in 2 and 3 dimensions. We compare the amount of computer time
needed to achieve a given level of statistical accuracy, rather than the speed
in terms of site updates per second or the dynamical critical exponents. Our
main result... | 1993-04-07 | 2015-06-25 | [
"cond-mat"
] | N.Ito and G.A.Kohring |
cond-mat/9304009 | Thermodynamics and Excitations of the Supersymmetric $t-J$ Model | The free energy of the supersymmetric $t-J$ model is expressed in terms of
finite temperature excitations above thermodynamic equilibrium. This reveals
that the free energy has the form of noninteracting fermions with temperature
dependant excitation spectra. We also discuss the ground state and zero
temperature excita... | 1993-04-07 | 2007-05-23 | [
"cond-mat"
] | Eric D. Williams |
cond-mat/9304010 | Resonant Tunneling Between Quantum Hall Edge States | Resonant tunneling between fractional quantum Hall edge states is studied in
the Luttinger liquid picture. For the Laughlin parent states, the resonance
line shape is a universal function whose width scales to zero at zero
temperature. Extensive quantum Monte Carlo simulations are presented for $\nu =
1/3$ which confir... | 1993-04-07 | 2009-10-22 | [
"cond-mat"
] | K. Moon, H. Yi, C.L. Kane, S.M. Girvin, Matthew P.A. Fisher |
cond-mat/9304006 | Statistical Laws and Mechanics of Voronoi Random Lattices | We investigate random lattices where the connectivities are determined by the
Voronoi construction, while the location of the points are the dynamic degrees
of freedom. The Voronoi random lattices with an associated energy are immersed
in a heat bath and investigated using a Monte Carlo simulation algorithm. In
thermod... | 1993-04-06 | 2007-05-23 | [
"cond-mat",
"hep-lat"
] | K. B. Lauritsen, C. Moukarzel and H. J. Herrmann |
cond-mat/9304007 | Spin-Charge Separation in Two Dimensions - A Numerical Study | The question of spin-charge separation in two-dimensional lattices has been
addressed by numerical simulations of the motion of one hole in a half-filled
band. The calculations have been performed on finite clusters with Hubbard and
t-J models. By comparing the time evolution of spin and charge polarisation
currents in... | 1993-04-06 | 2009-10-22 | [
"cond-mat"
] | Mihir Arjunwadkar, P. V. Panat and D. G. Kanhere |
cond-mat/9304005 | On the Lattice Corrections to the Free Energy of Kink-Bearing Nonlinear
One-Dimensional Scalar Systems | A ri proof of the effective potential (lattice corrections included) deduced
by Trullinger and Sasaki is given. Using asymptotic methods from the theory of
differential equations depending on a large parameter, the lattice corrections
to the kink and kink-kink contributions to the free energy are calculated. The
result... | 1993-04-05 | 2009-10-22 | [
"cond-mat"
] | D. Grecu, Anca Visinescu (Department of Theoretical Physics, Institute
of Atomic Physics, P.O.Box MG-6,Magurele,Bucharest,Romania) |
cond-mat/9304003 | Dynamical Correlation Theory for an Escape Process | A dynamical theory which incorporates the electron-electron correlations and
the effects of external magnetic fields for an electron escaping from a helium
surface is presented. The degrees of freedom in the calculation of the escape
rate is reduced from $3N$ to 3 as compared with other approach. Explicit
expressions f... | 1993-04-02 | 2015-06-25 | [
"cond-mat"
] | Ping Ao |
cond-mat/9304004 | Flory Exponents from a Self-Consistent Renormalization Group | The wandering exponent $\nu$ for an isotropic polymer is predicted remarkably
well by a simple argument due to Flory. By considering oriented polymers living
in a one-parameter family of background tangent fields, we are able to relate
the wandering exponent to the exponent in the background field through an
$\epsilon$... | 1993-04-02 | 2009-10-22 | [
"cond-mat"
] | Randall D. Kamien |
cond-mat/9304002 | Coulomb drag between disordered two-dimensional electron gas layers | We derive and evaluate expressions for the frictional Coulomb drag between
disordered two-dimensional electron gas layers. Our derivation is based on the
memory-function formalism and the expression for the drag reduces to previously
known results in the ballistic limit. We find that Coulomb drag is appreciably
enhance... | 1993-04-01 | 2009-10-22 | [
"cond-mat"
] | Lian Zheng and A.H. MacDonald |
cond-mat/9304001 | Two-dimensional Bose gas at low density | We propose a new method to describe the interacting bose gas at zero
temperature. We use the decomposition of the logarithm of the wave function
into the irreducible $n$-point functions. We argue that in the low density
limit this expansion corresponds to the expansion of the ground-state energy in
powers of the small ... | 1993-04-01 | 2015-06-25 | [
"cond-mat"
] | A.A.OVCHINNIKOV (Institute for Nuclear Research RAS, Moscow) |
cond-mat/9303051 | Elastic Theory of pinned flux lattices | The pinning of flux lattices by weak impurity disorder is studied in the
absence of free dislocations using both the gaussian variational method and, to
$O(\epsilon=4-d)$, the functional renormalization group. We find universal
logarithmic growth of displacements for $2<d<4$: $\overline{\langle u(x)-u(0)
\rangle ^2}\si... | 1993-03-30 | 2009-10-22 | [
"cond-mat"
] | T. Giamarchi and P. Le Doussal |
cond-mat/9303050 | Spectrum of a spin chain with inverse square exchange | The spectrum of a one-dimensional chain of $SU(n)$ spins positioned at the
static equilibrium positions of the particles in a corresponding classical
Calogero system with an exchange interaction inversely proportional to the
square of their distance is studied. As in the translationally invariant
Haldane--Shastry model... | 1993-03-26 | 2009-10-22 | [
"cond-mat"
] | H. Frahm |
cond-mat/9303049 | Traveling waves in a fluid layer submitted to a horizontal temperature
gradient | We report experimental observations of traveling waves in a pure fluid with a
free surface situated in a long container submitted to a horizontal temperature
gradient perpendicular to its large extension. Above a critical value of the
gradient and depending on the height of liquid $ h, $ a source of waves is
created in... | 1993-03-26 | 2007-05-23 | [
"cond-mat"
] | F. Daviaud, J.M. Vince |
cond-mat/9303048 | Nonequilibrium Dynamics and Aging in the Three--Dimensional Ising Spin
Glass Model | The low temperature dynamics of the three dimensional Ising spin glass in
zero field with a discrete bond distribution is investigated via MC
simulations. The thermoremanent magnetization is found to decay algebraically
and the temperature dependent exponents agree very well with the experimentally
determined values. T... | 1993-03-26 | 2009-10-22 | [
"cond-mat"
] | Heiko Rieger |
cond-mat/9303044 | Influence of cubic and dipolar anisotropies on the static and dynamic
coexistence anomalies of the time-dependent Ginzburg-Landau models | In isotropic systems below the transition temperature, the massless Goldstone
modes imply critical infrared singularities in the statics and dynamics along
the entire coexistence curve. We examine the important question whether these
coexistence anomalies are of relevance also in more realistic systems
displaying aniso... | 1993-03-25 | 2009-10-22 | [
"cond-mat"
] | U.C. Taeuber and F. Schwabl (TU Muenchen, Germany) |
cond-mat/9303046 | Large N Expansion for 4-Epsilon Dimensional Oriented Manifolds in Random
Media | The equilibrium statistical mechanics of a d dimensional ``oriented''
manifold in an N+d dimensional random medium are analyzed in d=4-epsilon
dimensions. For N=1, this problem describes an interface pinned by impurities.
For d=1, the model becomes identical to the directed polymer in a random
medium. Here, we generali... | 1993-03-25 | 2009-10-22 | [
"cond-mat"
] | Leon Balents and Daniel S. Fisher |
cond-mat/9303045 | Critical Exponents of the Three Dimensional Random Field Ising Model | The phase transition of the three--dimensional random field Ising model with
a discrete ($\pm h$) field distribution is investigated by extensive Monte
Carlo simulations. Values of the critical exponents for the correlation length,
specific heat, susceptibility, disconnected susceptibility and magnetization
are determi... | 1993-03-25 | 2009-10-22 | [
"cond-mat",
"hep-lat"
] | Heiko Rieger and A. P. Young |
cond-mat/9303047 | Critical Hysteresis | Hysteresis is observed at second order phase transitions. Universal scaling
formul\ae{} for the areas of hysteresis loops are written down. Critical
exponents are defined, and related to other exponents for static and dynamic
critical phenomena. These relations are verified with Langevin dynamics in both
the critical a... | 1993-03-25 | 2007-05-23 | [
"cond-mat",
"hep-lat"
] | Sourendu Gupta |
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