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 |
|---|---|---|---|---|---|---|
cond-mat/9503053 | Excitons in soliton and bipolaron lattice states of doped Peierls
systems | Exciton effects on soliton and bipolaron lattice states are investigated
using an electron-lattice Peierls model with long-range Coulomb interactions.
The Hartree-Fock (HF) approximation and the single-excitation
configuration-interaction (single-CI) method are used to obtain optical
absorption spectra. We discuss the ... | 1995-03-09 | 2007-05-23 | [
"cond-mat",
"chem-ph",
"mtrl-th"
] | Kikuo Harigaya, Yukihiro Shimoi, Shuji Abe |
cond-mat/9503048 | Spin Dynamics of the Triangular Heisenberg Antiferromagnet: A Schwinger
Boson Approach | We have analyzed the two-dimensional antiferromagnetic Heisenberg model on
the triangular lattice using a Schwinger boson mean-field theory. By expanding
around a state with local $120^\circ$ order, we obtain, in the limit of
infinite spin, results for the excitation spectrum in complete agreement with
linear spin wave... | 1995-03-09 | 2016-08-31 | [
"cond-mat"
] | Ann Mattsson |
cond-mat/9503039 | Screening effect of interlayer coupling on electronic transport
properties of layered high-$T_c$ oxides | We have investigated the effect of thermal fluctuation on the interlayer
coupling of three-dimensional Josephson-junction arrays with anisotropic
interactions as a model of layered high-$T_c$ oxides, focusing on non-Ohmic
current-voltage characteristics. Langevin dynamic simulations were performed
for various Josephson... | 1995-03-08 | 2016-08-31 | [
"cond-mat"
] | R. Sugano, T. Onogi, and Y. Murayama |
cond-mat/9503044 | Model of C-Axis Resistivity of High-$\Tc$ Cuprates | We propose a simple model which accounts for the major features and
systematics of experiments on the $c$-axis resistivity, $\rho_c$, for $\lsco$,
$\ybco$ and $\bsco $. We argue that the $c$-axis resistivity can be separated
into contributions from in-plane dephasing and the $c$-axis ``barrier''
scattering processes, w... | 1995-03-08 | 2016-08-31 | [
"cond-mat"
] | Yuyao Zha, S. L. Cooper and David Pines |
cond-mat/9503043 | Plastic energies in layered superconductors | We estimate the energy cost associated with two pancake vortices colliding in
a layered superconductor. It is argued that this energy sets the plastics
energy scale and is the analogue of the crossing energy for vortices in the
continuum case. The starting point of the calculation is the Lawrence-Doniach
version of the... | 1995-03-08 | 2016-08-31 | [
"cond-mat"
] | N.K. Wilkin and M.A. Moore |
cond-mat/9503041 | Critical Behavior of the 3d Random Field Ising Model: Two-Exponent
Scaling or First Order Phase Transition? | In extensive Monte Carlo simulations the phase transition of the random field
Ising model in three dimensions is investigated. The values of the critical
exponents are determined via finite size scaling. For a Gaussian distribution
of the random fields it is found that the correlation length $\xi$ diverges
with an expo... | 1995-03-08 | 2009-10-28 | [
"cond-mat",
"hep-lat"
] | Heiko Rieger |
cond-mat/9503040 | Tunneling Between Two-Dimensional Electron Gases in a Weak Magnetic
Field | We have measured the tunneling between two two-dimensional electron gases
(2DEGs) in weak magnetic fields, when the carrier densities of the two electron
layers are matched. At zero magnetic field, B=0, the lineshape of the
equilibrium tunneling resonance is best fit by a Lorentzian, with a linewidth
which is determine... | 1995-03-08 | 2007-05-23 | [
"cond-mat"
] | N. Turner, J. T. Nicholls, K. M. Brown, E. H. Linfield, M. Pepper, D.
A. Ritchie, and G. A. C. Jones (Cavendish Laboratory, Cambridge) |
cond-mat/9503042 | On the Plasmon-like Excitations of Atomic Clusters with Application to
Fullerene | We present here a modified hydrodynamical model for the collective electronic
excitations of spherical atomic clusters. The model is applied to the
giant-dipole plasmon mode of the free fullerene molecule. | 1995-03-08 | 2007-05-23 | [
"cond-mat"
] | B. Carazza (Physics Dept. Parma Italy) |
cond-mat/9503047 | A Rigorous Analysis of the Superconducting Phase of an Electron - Phonon
System | In these notes we give a very rough sketch of nonperturbative methods of many
body quantum field theory that are powerful enough to rigorously control weak
coupling instabilities in condensed matter phyics, for example, the Cooper
instability in an electron - phonon system. | 1995-03-08 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Joel Feldman (Univ of British Columbia), Jacques Magnen (Ecole
Polytechnique), Vincent Rivasseau (Ecole Polytechnique), and Eugene Trubowitz
(ETH) |
cond-mat/9503030 | Vortex, Defect, and Monopole Gauge Fields for Nambu-Goldstone Systems
and their Phase Transitions or Theory of Fluctuating Multivalued Fields | We survey the various uses of singular gauge fields which render an ideal
description of ensembles of line- and surface-like excitations and explain
phase transitions with the help of simple quadratic actions. Near a transition,
the singular gauge fields can be transformed into ordinary complex fields
called disorder f... | 1995-03-07 | 2016-08-15 | [
"cond-mat"
] | H. Kleinert (Institut f\"ur Theoretische Physik Freie Universit\"at) |
cond-mat/9503033 | SCHR\"ODINGER INVARIANCE IN DISCRETE STOCHASTIC SYSTEMS | Local scale invariance for lattice models is studied using new realizations
of the Schr\"odinger algebra. The two-point function is calculated and it turns
out that the result can be reproduced from exact two-point correlation
functions evaluated in the stationary state of several simple stochastic
models. | 1995-03-07 | 2015-06-25 | [
"cond-mat"
] | Malte Henkel and Gunter Sch\"utz |
cond-mat/9503031 | Anisotropic Spin-1/2 Heisenberg Chain with Open Boundary Conditions | We study the exact solution of the XXZ spin-1/2 Heisenberg chain with a
boundary magnetic field in the region where the bulk excitations are gapless.
It is shown that a bound state is created near the boundary with a total spin
$S = 1/2(\pi/\gamma - 1)$ where $\cos\gamma$ is the anisotropy parameter. When
$\gamma < \pi... | 1995-03-07 | 2015-06-25 | [
"cond-mat"
] | P. de Sa and A. M. Tsvelik |
cond-mat/9503032 | Randomly Charged Polymers: An Exact Enumeration Study | We perform an exact enumeration study of polymers formed from a (quenched)
random sequence of charged monomers $\pm q_0$. Such polymers, known as
polyampholytes, are compact when completely neutral and expanded when highly
charged. Our exhaustive search included all spatial conformations and quenched
sequences for up t... | 1995-03-07 | 2009-10-28 | [
"cond-mat"
] | Yacov Kantor and Mehran Kardar |
cond-mat/9503035 | Delocalization of electrons in a Random Magnetic Field | Delocalization problem for a two-dimensional non-interacting electron system
is studied under a random magnetic field. With the presence of a random
magnetic field, the Hall conductance carried by each eigenstate can become
nonzero and quantized in units of $e^2/h$. Extended states are characterized by
nonzero Hall con... | 1995-03-07 | 2016-08-31 | [
"cond-mat"
] | D.N. Sheng and Z. Y. Weng |
cond-mat/9503037 | GINZBURG-LANDAU THEORY OF VORTICES IN $d$-WAVE SUPERCONDUCTORS | Ginzburg-Landau theory is used to study the properties of single vortices and
of the Abrikosov vortex lattice in a $d_{x^2-y^2}$ superconductor. For a single
vortex, the $s$-wave order parameter has the expected four-lobe structure in a
ring around the core and falls off like $1/r^2$ at large distances. The
topological... | 1995-03-07 | 2016-08-31 | [
"cond-mat",
"supr-con"
] | A.J. Berlinsky, A.L. Fetter, M. Franz, C. Kallin, and P.I. Soininen |
cond-mat/9503034 | Dislocations in uniaxial lamellar phases of liquid crystals, polymers
and amphiphilic systems | Dislocations in soft condensed matter systems such as lamellar systems of
polymers, liquid crystals and ternary mixtures of oil, water and surfactant
(amphiphilic systems) are described in the framework of continuum elastic
theory. These systems are the subject of studies of physics, chemistry and
biology. They also fi... | 1995-03-07 | 2015-06-25 | [
"cond-mat"
] | R.Holyst and P.Oswald |
cond-mat/9503036 | Possible disordered ground states for close-packed polytypes and their
diffraction patterns | It has recently been shown that one-dimensional Ising problems can have
degenerate, disordered ground states (GSs) over a finite range of coupling
onstants, ie, without `fine tuning'. The disorder is however of a special kind,
consisting of arbitrary mixtures of a short-period structure and its
symmetry-degenerate part... | 1995-03-07 | 2016-08-31 | [
"cond-mat"
] | Jaichul Yi and Geoff S. Canright |
cond-mat/9503026 | Comment on " Thermodynamics of a One- Dimensional Ideal Gas with
fractional Exclusion Statistics " | In a recent letter -Phys. Rev. Lett. 73, 3331 (1995)-, the conclusion was
reached that, in the one-dimensional Calogero model, only the second virial
coefficient is affected by the statistical parameter $\alpha$, where $\alpha$
is related to the coupling constant $\kappa/ x_{ij}^2$ of the Calogero
interaction by $\kapp... | 1995-03-06 | 2016-08-31 | [
"cond-mat"
] | Alain DASNI\`ERES de VEIGY and St\'ephane OUVRY, Division de Physique
Th\'eorique, IPN, Orsay Fr-91406 |
cond-mat/9503025 | Quantum critical phenomena in ladders of Josephson junctions in a
magnetic field | A model of a ladder of Josephson junctions in a magnetic field is considered.
The topological features of the zero-temperature phase diagram, as a function
of charging energy and small deviations from commensurability of the vortex
lattice, are strongly dependent on the field. In addition to
superconductor-insulator tr... | 1995-03-06 | 2016-08-31 | [
"cond-mat",
"supr-con"
] | Enzo Granato |
cond-mat/9503028 | Continuum limit, Galilean invariance, and solitons in the quantum
equivalent of the noisy Burgers equation | A continuum limit of the non-Hermitian spin-1/2 chain, conjectured recently
to belong to the universality class of the noisy Burgers or, equivalently,
Kardar-Parisi-Zhang equation, is obtained and analyzed. The Galilean invariance
of the Burgers equation is explicitly realized in the operator algebra. In the
quasi-clas... | 1995-03-06 | 2009-10-28 | [
"cond-mat"
] | Hans C. Fogedby, Anders B. Eriksson, Lev V. Mikheev |
cond-mat/9503029 | Phase Transition, Longitudinal Spin Fluctuations and Scaling in a
Two-Layer Antiferromagnet | We consider a two-layer Heisenberg antiferromagnet which can be either in the
N\'{e}el-ordered or in the disordered phase at $T=0$, depending on the ratio of
the intra- and interlayer exchange constants. We reduce the problem to an
interacting Bose-gas and study the sublattice magnetization and the transverse
susceptib... | 1995-03-06 | 2016-08-31 | [
"cond-mat"
] | Andrey V. Chubukov and Dirk K. Morr |
cond-mat/9503027 | An Exactly Soluble Model of Directed Polymers with Multiple Phase
Transitions | Polymer chains with hard-core interaction on a two-dimensional lattice are
modeled by directed random walks. Two models, one with intersecting walks (IW)
and another with non-intersecting walks (NIW) are presented, solved and
compared. The exact solution of the two models, based on a representation using
Grassmann vari... | 1995-03-06 | 2016-08-31 | [
"cond-mat"
] | G. Forgacs and K. Ziegler |
cond-mat/9503023 | On thermoelastic phenomena around orientational ordering transition in
crystalline C60 | Thermoelastic phenomena associated with orientational phase transition in
solid C60 are considered. Coupling of the order parameter with elastic strain
is analyzed in the Landau theory of phase transitions. Wide range of possible
coexistence of the FCC phase with SC one in C60 has been found from 260 K down
to critical... | 1995-03-05 | 2016-08-31 | [
"cond-mat",
"chem-ph",
"mtrl-th"
] | M.A.Fradkin |
cond-mat/9503022 | Transitions Between Hall Plateaus and the Dimerization Transition of a
Hubbard Chain | We show that the plateau transitions in the quantum Hall effect is the same
as the dimerization transition of a half-filled, one dimensional, $U(2n)$
Hubbard model at $n=0$. We address the properties of the latter by a
combination of perturbative renormalization group and Monte Carlo simulations.
Results on both critic... | 1995-03-04 | 2015-06-25 | [
"cond-mat"
] | Dung-Hai Lee and Ziqiang Wang |
cond-mat/9503024 | From ODLRO to the Meissner Effect and Flux Quantization | It has been shown that the electron system with ODLRO in the reduced density
matrix $\rho _2$ can not support a uniform magnetic field, i.e., ODLRO\ in $%
\rho _2$ implies the Meissner effect \cite{2}\cite{3}, furthermore, the
magnetic field trapped in the system is quantized\cite{3}. This note extends
above results in... | 1995-03-04 | 2016-08-31 | [
"cond-mat"
] | Chi Au and Bao-Heng Zhao |
cond-mat/9503021 | BCS-Universal Ratios within the Van Hove Scenario | The central result of BCS theory are the Universal Ratios which do not depend
on physical parameters of the superconductor under study. Several attempts have
been made to introduce the van Hove Scenario within BCS theory but in none of
them the Universal Ratios of conventional superconductivity appear to be a
number in... | 1995-03-03 | 2009-10-28 | [
"cond-mat"
] | R. Baquero, D. Quesada, C. Trallero-Giner |
cond-mat/9503020 | Energy Barriers to Motion of Flux Lines in Random Media | We propose algorithms for determining both lower and upper bounds for the
energy barriers encountered by a flux line in moving through a two-dimensional
random potential. Analytical arguments, supported by numerical simulations,
suggest that these bounds scale with the length $t$ of the line as $t^{1/3}$
and $t^{1/3}\s... | 1995-03-03 | 2016-08-31 | [
"cond-mat"
] | Lev V. Mikheev (Nordita), Barbara Drossel and Mehran Kardar (MIT) |
cond-mat/9503018 | Replica Symmetry Breaking in Renormalization: Application to the
Randomly Pinned Planar Flux Array | The randomly pinned planar flux line array is supposed to show a phase
transition to a vortex glass phase at low temperatures. This transition has
been examined by using a mapping onto a 2D XY-model with random an\-iso\-tropy
but without vortices and applying a renormalization group treatment to the
replicated Hamilton... | 1995-03-03 | 2016-08-31 | [
"cond-mat"
] | Jan Kierfeld (Universit\"at K\"oln) |
cond-mat/9503019 | Critical Exponents of the Superconducting Phase Transition | We study the critical exponents of the superconducting phase transition in
the context of renormalization group theory starting from a dual formulation of
the Ginzburg-Landau theory. The dual formulation describes a loop gas of
Abrikosov flux tubes which proliferate when the critical temperature is
approached from belo... | 1995-03-03 | 2016-08-31 | [
"cond-mat",
"supr-con"
] | Michael Kiometzis, Hagen Kleinert, and Adriaan M. J. Schakel (Institut
f\"ur Theoretische Physik, Freie Universit\"at Berlin) |
cond-mat/9503038 | Exact Five-Loop Renormalization Group Functions of $\phi^4$-Theory with
O(N)-Symmetric and Cubic Interactions. Critical Exponents up to $\ep^5$ | The renormalization group functions are calculated in $D=4-\epsilon$
dimensions for the $\phi^4$-theory with two coupling constants associated with
an ${O}(N)$-symmetric and a cubic interaction. Divergences are removed by
minimal subtraction. The critical exponents $\eta$, $\nu$, and $\omega$ are
expanded up to order $... | 1995-03-03 | 2009-10-28 | [
"cond-mat"
] | H. Kleinert and V. Schulte-Frohlinde (Institut f\"ur Theoretische
Physik, Freie Universit\"at Berlin) |
cond-mat/9503014 | Inter-Edge interaction in the Quantum Hall Effect | We consider effects of the interaction between electrons drifting along the
opposite sides of a narrow sample under the conditions of the quantum Hall
effect. A spatial variation of this interaction leads to backward scattering of
collective excitations propagating along the edges. Experiments on propagation
of the edg... | 1995-03-02 | 2016-08-31 | [
"cond-mat"
] | Yuval Oreg and Alexander M. Finkel'stein |
cond-mat/9503017 | On $K_0$-Groups for Substitution Tilings | The group $C(\Om,\Z)/\E$ is determined for tilings which are invariant under
a locally invertible primitive \sst\ which forces its \saum. In case the tiling
may be obtained by the generalized dual method from a regular grid this group
furnishes part of the $K_0$-group of the algebra of the tiling. Applied to
Penrose ti... | 1995-03-02 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Johannes Kellendonk |
cond-mat/9503010 | Resonant two-magnon Raman scattering in parent compounds of high-T$_c$
superconductors. | We propose a theory of two-magnon Raman scattering from the insulating parent
compounds of high-T$_c$ superconductors, which contains information not only on
magnetism, but also on the electronic properties in these materials. We use
spin density wave formalism for the Hubbard model, and study diagrammatically
the prof... | 1995-03-02 | 2016-08-31 | [
"cond-mat"
] | Andrey V. Chubukov and David M. Frenkel |
cond-mat/9503012 | Neutron Scattering and $d$-Wave Symmetry in the Cuprates | In this comment we demonstrate that the general conjectures of Fong $et~ al$
on their ${\rm YBa_2Cu_3O_7}$ neutron experiments are realized in concrete
calculations of the neutron scattering structure factor $S({\bf q} , \omega )$
in this material. We make predictions for similar experiments in ${\rm
La_2Sr_{0.15}Cu_{1... | 1995-03-02 | 2016-08-31 | [
"cond-mat"
] | Yuyao Zha and K. Levin |
cond-mat/9503011 | Coadsorption of Copper and Sulfate on Au(111) Electrodes: Monte Carlo
Simulation of a Lattice-Gas Model | We report ground-state calculations and Monte Carlo simulations for a
lattice-gas model of the underpotential deposition of copper on Au(111) in
sulfate-containing electrolytes. In a potential range of approximately
100$\sim$150 mV, this system exhibits a $(\sqrt3\!\times\!\sqrt3)$ mixed phase
with 2/3 monolayer (ML) c... | 1995-03-02 | 2016-08-31 | [
"cond-mat",
"chem-ph"
] | J. Zhang, P.A. Rikvold, Y.-E. Sung, and A. Wieckowski |
cond-mat/9503016 | On the Four-Dimensional Diluted Ising Model | In this letter we show strong numerical evidence that the four dimensional
Diluted Ising Model for a large dilution is not described by the Mean Field
exponents. These results suggest the existence of a new fixed point with
non-gaussian exponents. | 1995-03-02 | 2009-10-28 | [
"cond-mat",
"hep-lat"
] | Giorgio Parisi and Juan J. Ruiz-Lorenzo |
cond-mat/9503015 | Structural Transition Models for a class of Irreversible Aggregates | A progress report on two recent theoretical approaches proposed to understand
the physics of irreversible fractal aggregates showing up a structural
transition from a rather dense to a more multibranched growth is presented. In
the first approach the transition is understood by solving the Poisson equation
on a squared... | 1995-03-02 | 2008-08-31 | [
"cond-mat"
] | E. Canessa |
cond-mat/9503002 | A Scenario to the Anomalous Hall Effect in the Mixed State of
Superconductors | We argue that the motion of vacancies in a pinned vortex lattice may dominate
the contribution to the Hall effect in an appropriate parameter regime for a
superconductor. Based on this consideration a model is constructed to explain
the anomalous Hall effect without any modification of the basic vortex dynamic
equation... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | Ping Ao |
cond-mat/9503007 | Wigner Crystals Phases in Bilayer Quantum Hall Systems | (This is a substantially shortened version of the original abstract:)
The Wigner crystal phase diagram of the bilayer systems have been studied
using variational methods. Five crystal phases are obtained. As the layer
spacing increases, the system will undergo a sequence of phase transitions. A
common feature of most... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | S. Narasimhan and Tin-Lun Ho |
cond-mat/9503008 | The Broken Symmetry of Two-Component $\nu=1/2$ Quantum Hall States | We show that the recently discovered $\nu=1/2$ quantum Hall states in bilayer
systems are triplet p-wave pairing states of composite Fermions, of exactly the
same form as $^{3}$He superfluids. The observed persistence (though weakening)
of the $\nu=1/2$ state in the two- to one-component crossover region
corresponds to... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | Tin-Lun Ho |
cond-mat/9503006 | Kondo Insulators Modeled by the One Dimensional Anderson Lattice: A
Numerical Renormalization Group Study | In order to better understand Kondo insulators, we have studied both the
symmetric and asymmetric Anderson lattices at half-filling in one dimension
using the density matrix formulation of the numerical renormalization group. We
have calculated the charge gap, spin gap and quasiparticle gap as a function of
the repulsi... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | M. Guerrero and Clare C. Yu (Univ. of California, Irvine) |
cond-mat/9503001 | Single layer/bilayer transition of electron systems in
AlGaAs/GaAs/AlGaAs quantum wells subject to in-plane magnetic fields | Equilibrium properties of electrons in double-heterojunction
AlGaAs/GaAs\AlGaAs structures are investigated theoretically, using a full
self-consistent numerical method. The transition from single to bilayer
electron systems is discussed for the case of double-junction structures with
varying distance between interface... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | L. Smrcka, T. Jungwirth |
cond-mat/9503005 | Quantum Hall effect in spin-degenerate Landau levels: Spin-orbit
enhancement of the conductivity | The quantum Hall regime in a smooth random potential is considered when two
disorder-broadened Zeeman levels overlap strongly. Spin-orbit coupling is found
to cause a drastic change in the percolation network which leads to a strong
enhancement of the dissipative conductivity at finite temperature, provided the
Fermi l... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | D. G. Polyakov and M. E. Raikh |
cond-mat/9503004 | Crossover from BCS to Composite Boson (Local Pair) Superconductivity in
Quasi-2D systems | The crossover from cooperative Cooper pairing to independent bound state
(composite bosons) formation and condensation in quasi-2D systems is studied.
It is shown that at low carrier density the critical superconducting
temperature is equal to the temperature of Bose-condensation of ideal quasi-2D
Bose-gas with heavy d... | 1995-03-01 | 2015-06-25 | [
"cond-mat",
"supr-con"
] | E.V. Gorbar, V.M. Loktev and S.G. Sharapov |
cond-mat/9503009 | Mean-Field Equations for Spin Models with Orthogonal Interaction
Matrices | We study the metastable states in Ising spin models with orthogonal
interaction matrices. We focus on three realizations of this model, the random
case and two non-random cases, i.e.\ the fully-frustrated model on an infinite
dimensional hypercube and the so-called sine-model. We use the mean-field (or
{\sc tap}) equat... | 1995-03-01 | 2009-10-28 | [
"cond-mat"
] | Giorgio Parisi and Marc Potters |
cond-mat/9503003 | Near-Equilibrium Dynamics of Crystalline Interfaces with Long-Range
Interactions in 1+1 Dimensional Systems | The dynamics of a one-dimensional crystalline interface model with long-range
interactions is investigated. In the absence of randomness, the linear response
mobility decreases to zero when the temperature approaches the roughening
transition from above, in contrast to a finite jump at the critical point in
the Kosterl... | 1995-03-01 | 2016-08-31 | [
"cond-mat"
] | Yan-Chr Tsai (University of Pennsylvania) |
cond-mat/9502115 | Enhanced Transmission Through Disordered Potential Barrier | Effect of weak disorder on tunneling through a potential barrier is studied
analytically. A diagrammatic approach based on the specific behavior of
subbarrier wave functions is developed. The problem is shown to be equivalent
to that of tunneling through rectangular barriers with Gaussian distributed
heights. The distr... | 1995-02-28 | 2009-10-28 | [
"cond-mat"
] | V. Freilikher, M. Pustilnik and I. Yurkevich |
cond-mat/9502120 | Critical Behaviour of Superfluid $^4$He in Aerogel | We report on Monte Carlo studies of the critical behaviour of superfluid
$^4$He in the presence of quenched disorder with long-range fractal
correlations. According to the heuristic argument by Harris, uncorrelated
disorder is irrelevant when the specific heat critical exponent $\alpha$ is
negative, which is the case f... | 1995-02-28 | 2016-08-31 | [
"cond-mat"
] | K. Moon and S. M. Girvin |
cond-mat/9502118 | Random Matrix Solution of a Polymer Collapse Model | A polymer folding model on the square lattice is constructed with attractive
contact interactions of strength 1/c^2, 0<c<1. The corresponding model on a
dynamical random lattice, with freely fluctuating co-ordination number at each
vertex, is formulated as a random two-matrix model and an expression for the
partition f... | 1995-02-28 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | S. Dalley |
cond-mat/9503013 | Scaling and Selection in Cellular Structures and Living Polymers | The dynamical behavior of two types of non-equilibrium systems is discussed:
$(a)$ two-dimensional cellular structures, and $(b)$ living polymers. Simple
models governing their evolution are introduced and steady state distributions
(cell side in the case of cellular structures and length in the case of living
polymers... | 1995-02-28 | 2007-05-23 | [
"cond-mat"
] | David Mukamel (Weizmann) |
cond-mat/9502117 | Resonant Tunneling and Coulomb Oscillations | The influence of quantum fluctuations on electron transport through small
metallic islands with Coulomb blockade effects is studied beyond the
perturbative regime. In tunnel junctions with low resistance higher order
coherent processes and ``inelastic resonant tunneling'' become important. We
present a path integral re... | 1995-02-28 | 2016-08-31 | [
"cond-mat"
] | J\"urgen K\"onig, Herbert Schoeller, and Gerd Sch\"on |
cond-mat/9502119 | COSMOLOGICAL EXPERIMENTS IN SUPERFLUIDS AND SUPERCONDUCTORS | Evolution of the order parameter in condensed matter analogues of
cosmological phase transitions is discussed. It is shown that the density of
the frozen-out topological defects is set by the competition between the quench
rate -- the rate at which the phase transition is taking place -- and the
relaxation rate of the ... | 1995-02-28 | 2016-08-31 | [
"cond-mat"
] | Wojciech H. Zurek |
cond-mat/9502116 | Enhanced Transmission Due to Disorder | The transmissivity of a one-dimensional random system that is periodic on
average is studied. It is shown that the transmission coefficient for
frequencies corresponding to a gap in the band structure of the average
periodic system increases with increasing disorder while the disorder is weak
enough. This property is s... | 1995-02-28 | 2009-10-28 | [
"cond-mat"
] | V. D. Freilikher, A. A. Maradudin, A. R. McGurn, B. A. Liansky, I. V.
Yurkevich |
cond-mat/9502110 | The Nonlinear Meissner Effect in Unconventional Superconductors | We examine the long-wavelength current response in anisotropic
superconductors and show how the field-dependence of the Meissner penetration
length can be used to detect the structure of the order parameter. Nodes in the
excitation gap lead to a nonlinear current-velocity constitutive equation at
low temperatures which... | 1995-02-27 | 2016-08-31 | [
"cond-mat",
"supr-con"
] | D. Xu, S. K. Yip and J.A. Sauls (Northwestern University) |
cond-mat/9502113 | Spin-Charge Separation in the $t-J$ Model: Magnetic and Transport
Anomalies | A real spin-charge separation scheme is found based on a saddle-point state
of the $t-J$ model. In the one-dimensional (1D) case, such a saddle-point
reproduces the correct asymptotic correlations at the strong-coupling
fixed-point of the model. In the two-dimensional (2D) case, the transverse
gauge field confining spi... | 1995-02-27 | 2009-10-28 | [
"cond-mat"
] | Z.Y. Weng, D.N. Sheng, and C.S. Ting |
cond-mat/9502112 | Magnetocrystalline Anisotropy Energy of a Transition Metal Monolayer: A
Non-perturbative Theory | The magnetocrystalline anisotropy energy $E_{anis}$ for a monolayer of Fe and
Ni is determined using a fully convergent tight-binding calculation including
$s$-$d$ hybridization. The spin-orbit interaction $\lambda_{so}$ is treated
non-perturbatively. Remarkably, we find $E_{anis}\propto\lambda_{so}^2$ and
important co... | 1995-02-27 | 2016-08-31 | [
"cond-mat",
"mtrl-th"
] | T. H. Moos, W. H\"ubner, and K. H. Bennemann (Institute for
Theoretical Physics, Freie Universit\"at Berlin) |
cond-mat/9502111 | Skyrmions in Higher Landau Levels | We calculate the energies of quasiparticles with large numbers of reversed
spins (``skyrmions'') for odd integer filling factors 2k+1, k is greater than
or equals 1. We find, in contrast with the known result for filling factor
equals 1 (k = 0), that these quasiparticles always have higher energy than the
fully polariz... | 1995-02-27 | 2016-08-31 | [
"cond-mat"
] | X.-G. Wu and S. L. Sondhi |
cond-mat/9502109 | Majorana Fermions, Exact Mapping between Quantum Impurity Fixed Points
with four bulk Fermion species, and Solution of the ``Unitarity Puzzle'' | Several Quantum Impurity problems with four flavors of bulk fermions have
zero temperature fixed points that show non fermi liquid behavior. They include
the two channel Kondo effect, the two impurity Kondo model, and the fixed point
occurring in the four flavor Callan-Rubakov effect. We provide a unified
description w... | 1995-02-26 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Juan M. Maldacena and Andreas W.W. Ludwig |
cond-mat/9502108 | Hydrodynamics and Nonlocal Conductivities in Vortex States | A hydrodynamical description for vortex states in type II superconductors
with no pinning is presented based on the time-dependent GL equation, and the
nonlocal conductivities are examined in terms of Kubo formula. Typically, the
nonlocal conductivities deviate from the usual vortex flow expressions as the
nonlocality ... | 1995-02-24 | 2016-08-31 | [
"cond-mat"
] | Ryusuke Ikeda (Indiana University) |
cond-mat/9502106 | Quantum fluctuations in the spiral phase of the Hubbard model | We study the magnetic excitations in the spiral phase of the two--dimensional
Hubbard model using a functional integral method. Spin waves are strongly
renormalized and a line of near--zeros is observed in the spectrum around the
spiral pitch $\pm{\bf Q}$. The possibility of disordered spiral states is
examined by stud... | 1995-02-24 | 2016-08-31 | [
"cond-mat"
] | C. Zhou and H. J. Schulz |
cond-mat/9502107 | Fractal properties of relaxation clusters and phase transition in a
stochastic sandpile automaton | We study numerically the spatial properties of relaxation clusters in a two
dimensional sandpile automaton with dynamic rules depending stochastically on a
parameter p, which models the effects of static friction. In the limiting cases
p=1 and p=0 the model reduces to the critical height model and critical slope
model,... | 1995-02-24 | 2016-08-31 | [
"cond-mat"
] | S. Luebeck (Theoretische Physik, University Duisburg Germany), K.D.
Usadel (Theoretische Physik, University Duisburg Germany), B. Tadic (Jozef
Stefan Institute, University of Ljubljana, Slovenia) |
cond-mat/9502102 | THE BIT GENERATOR AND TIME SERIES PREDICTION | Generation and prediction of time series is analyzed for the case of a
Bit-Generator: a perceptron where in each time step the input units are shifted
one bit to the right with the state of the leftmost input unit set equal to the
output unit in the previous time step. The long-time dynamical behavior of the
Bit-Genera... | 1995-02-24 | 2016-08-31 | [
"cond-mat"
] | E. Eisenstein, I. Kanter, D.A. Kessler (Bar Ilan University) and W.
Kinzel ( Universitaet Wuerzburg ) |
cond-mat/9502104 | Ferromagnetism in Hubbard Models: Low Density Route | Thirty years ago the Hubbard model was introduced by Gutzwiller, Hubbard and
Kanamori with the main purpose of mimicking the ferromagnetism of transition
metals. Soon after, Nagaoka and Thouless pointed out a basic mechanism for
ferromagnetism in strongly correlated electron systems by studying the motion
of a single h... | 1995-02-24 | 2016-08-31 | [
"cond-mat"
] | E. Mueller-Hartmann |
cond-mat/9502101 | Giant Shapiro Steps in Josephson Arrays: Analytical Results | We study two-dimensional frustrated Josephson arrays driven by a combined DC
plus AC current. We propose {\it ansatz} solutions that are a generalization of
the solutions obtained in the DC case by Marino and Halsey (PRB {\bf 50}, 6289
(1994)). Using these solutions we derive expressions for the Shapiro step
widths for... | 1995-02-24 | 2016-08-31 | [
"cond-mat"
] | Italo Marino |
cond-mat/9502103 | Universal Diamagnetism of Charged Scalar Fields | We show that charged scalar fields are always diamagnetic, even in the
presence of interactions and at finite temperatures. This generalises earlier
work on the diamagnetism of charged spinless bosons to the case of infinite
degrees of freedom. | 1995-02-24 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Debnarayan Jana |
cond-mat/9502105 | Model for the thermal conductivity of a quasicrystalline alloy | We present a simple model for the observed temperature dependence of the
thermal conductivity of AlPdMn (Chernikov et al, Phys.Rev.B vol.51,
(1995),153). We account for the low temperature data, upto and including the
plateau of the thermal conductivity, and discuss the similarities and the
differences between the quas... | 1995-02-24 | 2016-08-31 | [
"cond-mat",
"mtrl-th"
] | A. Jagannathan |
cond-mat/9502100 | THE SPIN-S BLUME-CAPEL RG FLOW DIAGRAM | Using the Finite Size Scaling Renormalisation Group we obtain the
two-dimensional flow diagram of the Blume-Capel model, for S = 1 and S = 3/2.
In the first case our results are similar to those of Mean Field Theory, which
predicts the existence of first and second order transitions whith a
tricritical point. In the se... | 1995-02-23 | 2016-08-31 | [
"cond-mat"
] | S. Moss de Oliveira, P.M.C. de Oliveira and F.C. Sa Barreto |
cond-mat/9502095 | Renormalization group analysis of electrons near a Van Hove singularity. | A model of interacting two dimensional electrons near a Van Hove singularity
is studied, using renormalization group techniques. In hole doped systems, the
chemical potential is found to be pinned near the singularity, when the
electron-electron interactions are repulsive. The RG treatment of the leading
divergences ap... | 1995-02-23 | 2016-08-31 | [
"cond-mat",
"hep-th",
"supr-con"
] | J. Gonzalez, F. Guinea and M. A. H. Vozmediano |
cond-mat/9502096 | A Variational Estimate of the Binding Energy of Charge-Transfer Excitons
in the Cuprate Superconductors. | We present a variational estimate for the binding energy of a Frenkel exciton
in the insulating cuprate superconductors. Starting from the three band Hubbard
model we perform a canonical transformation to O($t^2$), where $t$ is the bare
nearest neighbour copper-oxygen hopping integral. An effective Hamiltonian is
then ... | 1995-02-23 | 2016-08-31 | [
"cond-mat"
] | C. Vermeulen and W. Barford |
cond-mat/9502094 | Anomalous scaling and spin-charge separation in coupled chains | We use a bosonization approach to show that the three dimensional Coulomb
interaction in coupled metallic chains leads to a Luttinger liquid for
vanishing inter-chain hopping $t_{\bot}$, and to a Fermi liquid for any finite
$t_{\bot}$. However, for small $t_{\bot} \neq 0$ the Greens-function satisfies
a homogeneity rel... | 1995-02-23 | 2016-08-31 | [
"cond-mat"
] | Peter Kopietz, Volker Meden, and Kurt Schoenhammer |
cond-mat/9502093 | Effects of Impurity Vertex Correction on NMR Coherence Peak in S-Wave
Superconductors | We study the effects of non-magnetic impurity vertex correction on nuclear
spin-lattice relaxation rate $1/{T_1} $ of conventional s-wave superconductors
within the Eliashberg formalism. We obtain, with a self-consistent $t-$matrix
treatment of impurity scatterings, the expressions for impurity vertex function
and nucl... | 1995-02-23 | 2016-08-31 | [
"cond-mat"
] | Han-Yong Choi and E. J. Mele |
cond-mat/9502097 | The motion of holes on the triangular lattice: t-J model | The motion of holes on the triangular lattice is studied using the t-J model.
Within the Born self-consistent approximation and the exact Lanczos
diagonalization, the single hole physics is first analyzed. Then the spiral
theory of Shraiman and Siggia is used to investigate the case of a finite
density of holes. | 1995-02-23 | 2016-08-31 | [
"cond-mat"
] | Mohamed Azzouz and Thierry Dombre |
cond-mat/9502099 | Electron Depletion Due to Bias of a T-Shaped Field-Effect Transistor | A T-shaped field-effect transistor, made out of a pair of two-dimensional
electron gases, is modeled and studied. A simple numerical model is developed
to study the electron distribution vs. applied gate voltage for different gate
lengths. The model is then improved to account for depletion and the width of
the two-dim... | 1995-02-23 | 2009-10-28 | [
"cond-mat"
] | G. A. Georgakis and Qian Niu |
cond-mat/9502098 | Competition between electron-phonon attraction and weak Coulomb
repulsion | The Holstein-Hubbard model is examined in the limit of infinite dimensions.
Conventional folklore states that charge-density-wave (CDW) order is more
strongly affected by Coulomb repulsion than superconducting order because of
the pseudopotential effect. We find that both incommensurate CDW and
superconducting phases a... | 1995-02-23 | 2016-08-31 | [
"cond-mat"
] | J. K. Freericks (Georgetown University) and Mark Jarrell (University
of Cincinnati) |
cond-mat/9502086 | Resonances in Small Fermi Systems | The systematics of the size dependence of the resonant response of small
metal particles and nuclei to incident electromagnetic radiation is studied.
The known radius$^{-1}$ variation of the full width at half maximum (FWHM) in
matrix-embedded metal particles is qualitatively accounted for by a quantum
calculation of t... | 1995-02-22 | 2016-08-31 | [
"cond-mat",
"nucl-th"
] | Mustansir Barma and R. S. Bhalerao |
cond-mat/9502088 | Functional Bosonization of Interacting Fermions in Arbitrary Dimensions | We bosonize the long-wavelength excitations of interacting fermions in
arbitrary dimension by directly applying a suitable Hubbard-Stratonowich
transformation to the Grassmannian generating functional of the fermionic
correlation functions. With this technique we derive a surprisingly simple
expression for the single-p... | 1995-02-22 | 2016-08-31 | [
"cond-mat"
] | Peter Kopietz, Kurt Schoenhammer |
cond-mat/9502089 | Bosonization of interacting fermions in arbitrary dimension beyond the
Gaussian approximation | We use our recently developed functional bosonization approach to bosonize
interacting fermions in arbitrary dimension $d$ beyond the Gaussian
approximation. Even in $d=1$ the finite curvature of the energy dispersion at
the Fermi surface gives rise to interactions between the bosons. In higher
dimensions scattering pr... | 1995-02-22 | 2016-08-31 | [
"cond-mat"
] | Peter Kopietz, Joachim Hermisson and Kurt Schoenhammer |
cond-mat/9502087 | DOMAIN WALLS IN THE QUANTUM TRANSVERSE ISING MODEL | We discuss several problems concerning domain walls in the spin $S$ Ising
model at zero temperature in a magnetic field, $H/(2S)$, applied in the $x$
direction. Some results are also given for the planar ($y$-$z$) model in a
transverse field. We treat the quantum problem in one dimension by perturbation
theory at small... | 1995-02-22 | 2009-10-28 | [
"cond-mat"
] | Malte Henkel, A. Brooks Harris and Marek Cieplak |
cond-mat/9502090 | Integrable models of coupled Heisenberg chains | We show that the solutions of the Yang--Baxter equation invariant under the
action of the Yangian $Y(sl_2)$ lead to inhomogenous vertex models. Starting
from a four dimensional representation of $Y(sl_2)$ we obtain an integrable
family of coupled Heisenberg spin-$1\over2$ chains. Some thermodynamical
properties of this... | 1995-02-22 | 2009-10-28 | [
"cond-mat"
] | Holger Frahm and Claus R"odenbeck |
cond-mat/9502092 | CRITICAL EXPONENTS OF THE 3D ANTIFERROMAGNETIC THREE-STATE POTTS MODEL
USING THE COHERENT-ANOMALY METHOD | The antiferromagnetic three-state Potts model on the simple-cubic lattice is
studied using the coherent-anomaly method (CAM). The CAM analysis provides the
estimates for the critical exponents which indicate the XY universality class,
namely $\alpha=-0.011 $, $\beta= 0.351 $, $\gamma= 1.309 $ and $\delta= 4.73 $.
This ... | 1995-02-22 | 2015-06-25 | [
"cond-mat"
] | M. Kolesik and M. Suzuki |
cond-mat/9502085 | Propagating S=1/2 particles in S=1 Haldane gap systems | Inspired by the recent experiments on Y$_{2-x}$Ca$_x$BaNiO$_5$, (J. F. DiTusa
{\it et al.}, Phys. Rev. Lett. 73, 1857 (1994)), we discuss the dispersion
relation of the $s$=1/2 particles in the $s$=1 Heisenberg and VBS model in the
limit of small hopping amplitudes. The effective $s$=1/2 edge spins mix with
the spin of... | 1995-02-22 | 2016-08-31 | [
"cond-mat"
] | Karlo Penc and Hiroyuki Shiba |
cond-mat/9502091 | Ground-State Dynamical Correlation Functions: An Approach from Density
Matrix Renormalization Group Method | A numerical approach to ground-state dynamical correlation functions from
Density Matrix Renormalization Group (DMRG) is developed. Using sum rules,
moments of a dynamic correlation function can be calculated with DMRG, and with
the moments the dynamic correlation function can be obtained by the maximum
entropy method.... | 1995-02-22 | 2016-08-31 | [
"cond-mat"
] | Hanbin Pang, H. Akhlaghpour, and M. Jarrell |
cond-mat/9502079 | Mesoscopic Systems With Fixed Number of Electrons | In this paper, we study the physics of mesoscopic systems with
noninteracting, but fixed number of electrons. From a technical point of view,
this means a discussion of the differences between the canonical and the grand
canonical ensemble (fixed versus fluctuating number of particles). Such a
discussion is not trivial... | 1995-02-21 | 2016-08-31 | [
"cond-mat"
] | W. Lehle, A. Schmid |
cond-mat/9502081 | The Toulose limit of the Multi-Channel Kondo model. | We study the Toulouse limit of the multi-channel Kondo model defined as the
limit of maximal anisotropy which can be achieved without changing the infrared
behaviour of the model. It is shown that when the number of channels exceeds 2,
the interactions do not vanish and the Toulouse limit remains a non-trivial
field th... | 1995-02-21 | 2016-08-31 | [
"cond-mat"
] | A. M. Tsvelik, |
cond-mat/9502082 | Chiral Non-Fermi Liquids in 1-d | We study models of chiral interacting fermions by means of conformal and
Bethe-Ansatz techniques, and determine their thermodynamic properties and
asymptotic correlation functions. We identify a class of fixed points
characterizing the infrared behavior of the models. They display {\it chirally
stabilized} non Fermi-Li... | 1995-02-21 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Natan Andrei, Michael R. Douglas and Andr\'es Jerez |
cond-mat/9502084 | MICROWAVE-INDUCED "SOMERSAULT EFFECT" IN FLOW OF JOSEPHSON CURRENT
THROUGH A QUANTUM CONSTRICTION | We consider the supercurrent flow through gated mesoscopic semiconductor
hetrostructures in which a two-dimensional normal constriction is confined
between superconducting electrodes. We show that for these structures the
Josephson current, carried by quantized electron modes, can be strongly
affected by an electromagn... | 1995-02-21 | 2016-08-31 | [
"cond-mat"
] | L. Y. Gorelik, V. S. Shumeiko, R. I. Shekhter, G. Wendin, and
M.~Jonson |
cond-mat/9502080 | RANDOM MATRIX THEORY APPROACH TO THE INTENSITY DISTRIBUTIONS OF WAVES
PROPAGATING IN A RANDOM MEDIUM | Statistical properties of coherent radiation propagating in a quasi - 1D
random media is studied in the framework of random matrix theory. Distribution
functions for the total transmission coefficient and the angular transmission
coefficient are obtained. | 1995-02-21 | 2009-10-28 | [
"cond-mat"
] | Eugene Kogan and Moshe Kaveh |
cond-mat/9502083 | Photoemission spectra of ${\rm Sr_2 Cu O_2 Cl_2}$: a theoretical
analysis | Recent angle resolved photoemission (ARPES) results for the insulating
cuprate ${\rm Sr_2 Cu O_2 Cl_2}$ have provided the first experimental data
which can be directly compared to the (theoretically) well--studied problem of
a single hole propagating in an antiferromagnet. The ARPES results reported a
small bandwidth, ... | 1995-02-21 | 2016-08-31 | [
"cond-mat"
] | A. Nazarenko, K.J.E. Vos, S. Haas, E. Dagotto, and R.J. Gooding |
cond-mat/9502078 | SCATTERING INVOLVING PROMPT AND EQUILIBRATED COMPONENTS, INFORMATION
THEORY, AND CHAOTIC QUANTUM DOTS | We propose an information-theoretic statistical model to describe the
universal features of those chaotic scattering processes characterized by a
prompt and an equilibrated component. The model, introduced in the past in
nuclear physics, incorporates the average value of the scattering matrix to
describe the prompt pro... | 1995-02-20 | 2016-08-31 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | H.U. Baranger (AT&T Bell Labs) and P.A. Mello (UNAM, Mexico) |
cond-mat/9502077 | Equilibrium Current and Orbital Magnetization in a Quantum Hall Fluid | We present a general theory for the equilibrium current distribution in an
interacting two-dimensional electron gas subjected to a perpendicular magnetic
field, and confined by a potential that varies slowly on the scale of the
magnetic length. The distribution is found to consist of strips or channels of
current, whic... | 1995-02-19 | 2016-08-31 | [
"cond-mat"
] | Michael R. Geller and Giovanni Vignale |
cond-mat/9502075 | Full dynamical solution for a spherical spin-glass model | We present a detailed analysis for the Langevin dynamics of a spherical
spin-glass model (the spherical Sherrington-Kirkpatrick model). All the spins
in the system are coupled by pairs via a random interaction matrix taken from
the Gaussian ensemble. One finds that for a general initial configuration the
system never r... | 1995-02-17 | 2016-08-31 | [
"cond-mat"
] | Leticia F. Cugliandolo and David S. Dean |
cond-mat/9502073 | Susceptibility of the one-dimensional, dimerized Hubbard model | We show that the zero temperature susceptibility of the one-dimensional,
dimerized Hubbard model at quarter-filling can be accurately determined on the
basis of exact diagonalization of small clusters. The best procedure is to
perform a finite-size scaling of the spin velocity $u_\sigma$, and to calculate
the susceptib... | 1995-02-17 | 2016-08-31 | [
"cond-mat"
] | Frederic Mila and Karlo Penc |
cond-mat/9502074 | Deducing correlation parameters from optical conductivity in the
Bechgaard salts | Numerical calculations of the kinetic energy of various extensions of the
one-dimensional Hubbard model including dimerization and repulsion between
nearest neighbours are reported. Using the sum rule that relates the kinetic
energy to the integral of the optical conductivity, one can determine which
parameters are con... | 1995-02-17 | 2016-08-31 | [
"cond-mat"
] | Frederic Mila |
cond-mat/9502076 | Bosonization rules in $1/2 +1$ dimensions | We derive the bosonization rules for free fermions on a half-line with
physically sensible boundary conditions for Luttinger fermions. We use
path-integral methods to calculate the bosonized fermionic currents on the
half-line and derive their commutation relations for a system with a boundary.
We compute the fermion d... | 1995-02-17 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | Manuel Fuentes, Ana Lopez, Eduardo Fradkin and Enrique Moreno |
cond-mat/9502071 | Four-Particle Anyon Exciton: Boson Approximation | A theory of anyon excitons consisting of a valence hole and three
quasielectrons with electric charges $(-e/3)$ is presented. A full symmetry
classification of the $k=0$ states is given, where $k$ is the exciton momentum.
The energy levels of these states are expressed by quadratures of confluent
hypergeometric functio... | 1995-02-17 | 2016-08-08 | [
"cond-mat"
] | M. E. Portnoi and E. I. Rashba |
cond-mat/9502072 | COMPLETE SOLUTION OF THE XXZ-MODEL ON FINITE RINGS. DYNAMICAL STRUCTURE
FACTORS AT ZERO TEMPERATURE. | The finite size effects of the dynamical structure factors in the XXZ-model
are studied in the euclidean time $(\tau)$-representation. Away from the
critical momentum $p=\pi$ finite size effects turn out to be small except for
the large $\tau$ limit. The large finite size effects at the critical momentum
$p=\pi$ signal... | 1995-02-17 | 2009-10-28 | [
"cond-mat"
] | K. Fabricius, U. L\"ow and K.-H. M\"utter |
cond-mat/9502070 | Semiclassical Analysis of the Conductance of Mesoscopic Systems | The Kubo formula for the conductance of classically chaotic systems is
analyzed semiclassically, yielding simple expressions for the mean and the
variance of the quantum interference terms. In contrast to earlier work, here
times longer than $O( \log \hbar^{-1} )$ give the dominant contributions, i.e.
the limit $\hbar ... | 1995-02-16 | 2016-08-31 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Nathan Argaman (Weizmann Institute, now at ITP, UCSB) |
cond-mat/9502114 | Defects in Superfluids, Superconductors and Membranes | An introduction to the defects which dominate the physics of superfluid
He$^4$ films, of superconducting slabs and of crystalline and hexatic membranes
is given. We first review point vortices in two-dimensional neutral superfluids
and discuss the unusual screening which arises when the bosons are charged, as
in superc... | 1995-02-16 | 2007-05-23 | [
"cond-mat"
] | David R. Nelson (Harvard University) |
cond-mat/9502067 | Replica Theory and Large D Josephson Junction Hypercubic Models | We study the statistical mechanics of a $D$-dimensional array of Josephson
junctions in presence of a magnetic field on a lattice of side $2$. In the high
temperature region the thermodynamical properties can be computed in the limit
$D \to \infty$. A conjectural form of the thermodynamic properties in the low
temperat... | 1995-02-16 | 2016-08-31 | [
"cond-mat",
"hep-lat",
"hep-th"
] | Enzo Marinari, Giorgio Parisi and Felix Ritort |
cond-mat/9502069 | Early stage scaling in phase ordering kinetics | A global analysis of the scaling behaviour of a system with a scalar order
parameter quenched to zero temperature is obtained by numerical simulation of
the Ginzburg-Landau equation with conserved and non conserved order parameter.
A rich structure emerges, characterized by early and asymptotic scaling
regimes, separat... | 1995-02-16 | 2016-08-31 | [
"cond-mat"
] | F.Corberi, A.Coniglio and M.Zannetti |
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