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/9512176 | Multifractal Analysis of the Coupling Space of Feed-Forward Neural
Networks | Random input patterns induce a partition of the coupling space of
feed-forward neural networks into different cells according to the generated
output sequence. For the perceptron this partition forms a random multifractal
for which the spectrum $f(\alpha)$ can be calculated analytically using the
replica trick. Phase t... | 1995-12-29 | 2009-10-28 | [
"cond-mat",
"q-bio"
] | A. Engel, M. Weigt, (Otto-von-Guericke-Universit\"at Magdeburg,
Germany) |
cond-mat/9512175 | Equation of Motion for a Spin Vortex and Geometric Force | The Hamiltonian equation of motion is studied for a vortex occuring in
2-dimensional Heisenberg ferromagnet of anisotropic type by starting with the
effective action for the spin field formulated by the Bloch (or spin) coherent
state. The resultant equation shows the existence of a geometric force that is
analogous to ... | 1995-12-29 | 2009-10-28 | [
"cond-mat"
] | Hiroshi Kuratsuji, Hiroyuki Yabu |
cond-mat/9512173 | A Calogero-Sutherland Type Model For Branched Polymers | We show that a Calogero-Sutherland type model with anharmonic interactions of
fourth and sixth orders leads to the matrix model corresponding to the branched
polymers. We also show that by suitably modifying this model one can also
obtain N-particle problems which are connected to matrix models corresponding
to the pur... | 1995-12-27 | 2015-06-25 | [
"cond-mat",
"hep-th"
] | Dileep P. Jatkar and Avinash Khare |
cond-mat/9512172 | Matrix Product Ground States for Asymmetric Exclusion Processes with
Parallel Dynamics | We show in the example of a one-dimensional asymmetric exclusion process that
stationary states of models with parallel dynamics may be written in a matrix
product form. The corresponding algebra is quadratic and involves three
different matrices. Using this formalism we prove previous conjectures for the
equal-time co... | 1995-12-27 | 2009-10-28 | [
"cond-mat"
] | Haye Hinrichsen (Weizmann Institute, Rehovot) |
cond-mat/9512171 | Nonlinearities in Conservative Growth Equations | Using the dynamic renormalization group (DRG) technique, we analyze general
nonlinearities in a conservative nonlinear growth equation with non-conserved
gaussian white noise. We show that they fall in two classes only: the
Edwards-Wilkinson and Lai-Das Sarma types, by explicitly computing the
associated amputated two ... | 1995-12-27 | 2009-10-28 | [
"cond-mat"
] | Abhijit K. Kshirsagar and S.V. Ghaisas |
cond-mat/9512168 | Study on Ground States of Quantum Spin Systems by Restructuring Method | We present a new method to study the ground state of quantum spin systems
using the Monte Carlo techniques together with restructured intermediate states
which we proposed previously.
Our basic idea is to obtain coefficients in the expansion of the ground state
from measurements of the normalized frequencies of each ... | 1995-12-25 | 2016-08-31 | [
"cond-mat"
] | Tomo Munehisa and Yasuko Munehisa( Yamanashi Univ.) |
cond-mat/9512167 | Dynamical Probability Distribution Function of the SK Model at High
Temperatures | The microscopic probability distribution function of the
Sherrington-Kirkpatrick (SK) model of spin glasses is calculated explicitly as
a function of time by a high-temperature expansion. The resulting formula to
the third order of the inverse temperature shows that an assumption made by
Coolen, Laughton and Sherringto... | 1995-12-25 | 2009-10-28 | [
"cond-mat"
] | Hidetoshi Nishimori and Michiko Yamana (Tokyo Institute of Technology) |
cond-mat/9512166 | $\nu =1/2$ Bilayer Tunnelling | Tunneling of electrons between two $\nu = 1/2$ quantum Hall parallel planes
is studied. In order to calculate the physical electron Green's function, the
Chern-Simons gauge field formalism is used, both in a perturbative many-body
calculation and in a semiclassical calculation. In contrast to recent
experiments, no gap... | 1995-12-24 | 2007-05-23 | [
"cond-mat"
] | David Lidsky |
cond-mat/9512165 | Exact Solution of an One Dimensional Deterministic Sandpile Model | Using the transfer matrix method, we give the exact solution of a
deterministic sandpile model for arbitrary $N$, where $N$ is the size of a
single toppling. The one- and two-point functions are given in term of the
eigenvalues of an $N \times N$ transfer matrix. All the n-point functions can
be found in the same way. ... | 1995-12-24 | 2009-10-28 | [
"cond-mat"
] | Darwin Chang(Natl. Tsing-Hua Univ.), Shih-Chang Lee(Academia Sinica)
and Wen-Jer Tzeng(Academia Sinica) |
cond-mat/9512164 | Transfer Matrix Method in Sandpile Models | We present a transfer matrix method which is particularly useful for solving
some classes of sandpile models. The method is then used to solve the
deterministic nonabelian sandpile models for N=2 and N=3. The possibility of
generalization to arbitrary N is discussed briefly. | 1995-12-24 | 2007-05-23 | [
"cond-mat"
] | Darwin Chang(Natl. Tsing Hua Univ.), Chen-Shan Chin(Natl. Tsing Hua
Univ.), Shih-Chang Lee(Academic Sinica) |
cond-mat/9512163 | Chiral Fluctuations and Structures | Chiral molecules form a number of non-chiral structures, the simplest being
an isotropic fluid phase. In a mesophase of achiral molecules the fluctuations
will on average be achiral as well: left-handed twists and right-handed twists
will occur with the same probability. In a system composed of chiral molecules,
howeve... | 1995-12-23 | 2008-02-03 | [
"cond-mat"
] | T.C. Lubensky, Randall D. Kamien and Holger Stark |
cond-mat/9512161 | Theory of Nuclear Magnetic Relaxation in Haldane Gap Materials: An
Illustration of the Use of (1+1)-Dimensional Field Theory Techniques | A comprehensive theory of nuclear magnetic relaxation is developed for
Haldane Gap materials using nonlinear sigma, boson and fermion models. We
include a thorough discussion of of the effects of interchain couplings,
nearest neighbour hyperfine couplings and crystal structure. We also introduce
a new theory of impurit... | 1995-12-22 | 2008-02-03 | [
"cond-mat"
] | Jacob S. Sagi |
cond-mat/9512155 | Aspect ratio analysis for ground states of bosons in anisotropic traps | Characteristics of the initial condensate in the recent experiment on
Bose-Einstein condensation (BEC) of ${}^{87}$Rb atoms in an anisotropic
magnetic trap is discussed. Given the aspect ratio $R$, the quality of BEC is
estimated. A simple analytical Ansatz for the initial condensate wave function
is proposed as a func... | 1995-12-22 | 2015-06-25 | [
"cond-mat",
"hep-th",
"quant-ph"
] | Kirill Ilinski and Alexander Moroz |
cond-mat/9512149 | Some New Results on Yang-Lee Zeros of the Ising Model Partition Function | We prove that for the Ising model on a lattice of dimensionality $d \ge 2$,
the zeros of the partition function $Z$ in the complex $\mu$ plane (where
$\mu=e^{-2\beta H}$) lie on the unit circle $|\mu|=1$ for a wider range of
$K_{n n'}=\beta J_{nn'}$ than the range $K_{n n'} \ge 0$ assumed in the premise
of the Yang-Lee... | 1995-12-22 | 2009-10-28 | [
"cond-mat",
"hep-lat"
] | Victor Matveev and Robert Shrock |
cond-mat/9512160 | Spin-reflection positivity of the Kondo lattice at half-filling | We examine the spin-reflection positivity of the ground state of the Kondo
lattice model at half-filling with the antiferromagnetic and ferromagnetic
exchange couplings $J\ne0$. For every positive $U>0$, where U is the Coulomb
interaction between the conduction electrons, we can show that the ground state
is unique. | 1995-12-22 | 2007-05-23 | [
"cond-mat"
] | T. Yanagisawa and Y. Shimoi |
cond-mat/9512156 | Aspects of d-Density Order | I briefly review the concept of d-density ordering, extend it to arbitrary
dimensions, and speculate that it might describe Mott insulators. This ordering
supports zero modes on domain walls, and quite plausibly dopants occupy such
states. This phenomenon could induce quasi-one dimensional behavior in a
two-dimensional... | 1995-12-22 | 2008-02-03 | [
"cond-mat"
] | Frank Wilczek |
cond-mat/9512152 | Shadow band in the one-dimensional large $U$ Hubbard model | We show that the factorized wave-function of Ogata and Shiba can be used to
calculate the $k$ dependent spectral functions of the one-dimensional, infinite
$U$ Hubbard model, and of some extensions to finite $U$. The resulting spectral
function is remarkably rich: In addition to low energy features typical of
Luttinger... | 1995-12-22 | 2009-10-28 | [
"cond-mat"
] | Karlo Penc, Karen Hallberg, Frederic Mila and Hiroyuki Shiba |
cond-mat/9512154 | Evidence of a Critical time in Constrained Kinetic Ising models | We study the relaxational dynamics of the one-spin facilitated Ising model
introduced by Fredrickson and Andersen. We show the existence of a critical
time which separates an initial regime in which the relaxation is exponentially
fast and aging is absent from a regime in which relaxation becomes slow and
aging effects... | 1995-12-22 | 2009-10-28 | [
"cond-mat"
] | E. Follana and F. Ritort |
cond-mat/9512159 | A microscopic approach to the response of $^{\bf 3}$He -$^{\bf 4}$He
mixtures | Correlated Basis Function perturbation theory is used to evaluate the zero
temperature response $S(q,\omega)$ of $^3$He-$^4$He mixtures for inelastic
neutron scattering, at momentum transfers $q$ ranging from $1.1$ to $1.7
\AA^{-1}$. We adopt a Jastrow correlated ground state and a basis of correlated
particle-hole and... | 1995-12-22 | 2009-10-28 | [
"cond-mat"
] | A. Fabrocini, L. Vichi, F. Mazzanti, and A. Polls |
cond-mat/9512150 | Quantum melting on a lattice and a delocalization transition | We consider 2d gas of spinless fermions with the Coulomb interaction on a
lattice at T=0 and at different values of the hopping amplitude J. At small J
electrons form a periodic structure. At filling factor \nu=1/6 this structure
melts at J as low as 0.02--0.03 in units of the nearest-neighbor Coulomb
energy. We argue ... | 1995-12-22 | 2008-02-03 | [
"cond-mat"
] | E. V. Tsiper (1), F. G. Pikus (2), A. L. Efros (1) ((1) University of
Utah, (2) University of California at Santa Barbara) |
cond-mat/9512158 | Stability of the Renormalization Group in the 2D Random Ising and Baxter
Models with respect to the Replica Symmetry Breaking | We study the critical properties of the weakly disordered two-dimensional
Ising and Baxter models in terms of the renormalization group (RG) theory
generalized to take into account the replica symmetry breaking (RSB) effects.
Recently it has been shown that the traditional replica-symmetric RG flows in
the dimensions $... | 1995-12-22 | 2009-10-28 | [
"cond-mat"
] | D.E.Feldman, A.V.Izyumov and Viktor Dotsenko |
cond-mat/9512162 | Griffiths Singularities in the Disordered Phase of a Quantum Ising Spin
Glass | We study a model for a quantum Ising spin glass in two space dimensions by
Monte Carlo simulations. In the disordered phase at $T=0$, we find power law
distributions of the local susceptibility and local non-linear susceptibility,
which are characterized by a smoothly varying dynamical exponent $z$. Over a
range of the... | 1995-12-22 | 2009-10-28 | [
"cond-mat"
] | H. Rieger and A. P. Young |
cond-mat/9512151 | Hall Coefficient in the doped Mott Insulator | We compute the (zero frequency) Hall coefficient $R_H$, and the high
frequency Hall constant $R_H^*$ for the strong coupling Hubbard model away from
half-filling, in the $d=\infty$/ local approximation, using the new iterated
perturbation scheme proposed by Kajueter and Kotliar. We find quantitative
agreement of our $R... | 1995-12-22 | 2007-05-23 | [
"cond-mat"
] | Pinaki Majumdar and H. R. Krishnamurthy (IISc Bangalore, India) |
cond-mat/9512153 | Persistent Currents in Interacting Systems: Role of the Spin | Persistent currents flowing through disordered mesoscopic rings threaded by a
magnetic flux are investigated. Models of fermions with on-site interactions
(Hubbard model) or models of spinless fermions with nearest neighbor
interactions are considered on 2D cylinders with twisted boundary conditions in
one direction to... | 1995-12-22 | 2007-05-23 | [
"cond-mat"
] | Georges Bouzerar and Didier Poilblanc |
cond-mat/9512146 | Final state effects on superfluid $^{\bf 4}$He in the deep inelastic
regime | A study of Final State Effects (FSE) on the dynamic structure function of
superfluid $^4$He in the Gersch--Rodriguez formalism is presented. The main
ingredients needed in the calculation are the momentum distribution and the
semidiagonal two--body density matrix. The influence of these ground state
quantities on the F... | 1995-12-21 | 2009-10-28 | [
"cond-mat"
] | F. Mazzanti, J. Boronat and A. Polls |
cond-mat/9512148 | Charge-Vortex Duality in Double-Layered Josephson Junction Arrays | A system of two parallel Josephson junction arrays coupled by interlayer
capacitances is considered in the situation where one layer is in the
vortex-dominated and the other in the charge-dominated regime. This system
shows a symmetry (duality) of the relevant degrees of freedom, i.e. the
vortices in one layer and the ... | 1995-12-21 | 2009-10-28 | [
"cond-mat"
] | Yaroslav M. Blanter and Gerd Schoen |
cond-mat/9512170 | Sample-size dependence of the ground-state energy in a one-dimensional
localization problem | We study the sample-size dependence of the ground-state energy in a
one-dimensional localization problem, based on a supersymmetric quantum
mechanical Hamiltonian with random Gaussian potential. We determine, in the
form of bounds, the precise form of this dependence and show that the
disorder-average ground-state ener... | 1995-12-21 | 2009-10-28 | [
"cond-mat"
] | C.Monthus (SPhT, CE Saclay France), G.Oshanin (DPT, IPN Orsay France),
A.Comtet (DPT, IPN Orsay France), and S.F.Burlatsky (Seattle, USA) |
cond-mat/9512145 | Collective Modes in a Symmetry-Broken Phase: Antiferromagnetically
Correlated Quantum Wells | We investigate the intersubband spin-density-excitation spectrum of a double
quantum well in a low-density symmetry-broken phase with interwell
antiferromagnetic correlations. This spectrum is related to the intensity
measured in depolarized inelastic light scattering (ILS) experiments and
therefore provides a means of... | 1995-12-21 | 2009-10-28 | [
"cond-mat"
] | R. J. Radtke and S. Das Sarma |
cond-mat/9512142 | Quantum Hopfield Model | The Hopfield model in a transverse field is investigated in order to clarify
how quantum fluctuations affect the macroscopic behavior of neural networks.
Using the Trotter decomposition and the replica method, we find that the
$\alpha$ (the ratio of the number of stored patterns to the system
size)-$\Delta$ (the streng... | 1995-12-21 | 2008-02-03 | [
"cond-mat"
] | Yoshihiko Nonomura and Hidetoshi Nishimori |
cond-mat/9512147 | Generalized Helimagnets Between Two and Four Dimensions | We study the phase transitions of N-components generalized helimagnets that
obey the symmetry breaking pattern O(N) x O(N-1) -> O(N-1)_diag . In the
neighborhood of two dimensions, a D=2+epsilon renormalization group study
reveals a rich fixed point structure as well as a nematic-like phase with
partial spin ordering. ... | 1995-12-21 | 2010-03-25 | [
"cond-mat"
] | Francois David and Thierry Jolicoeur |
cond-mat/9512144 | Ground-State Phase Diagram of the Two-Dimensional Quantum Heisenberg
Mattis Model | The two-dimensional $S=1/2$ asymmetric Heisenberg Mattis model is
investigated with the exact diagonalization of finite clusters. The N\'eel
order parameter and the spin glass order parameter can be smoothly extrapolated
to the thermodynamic limit in the antiferromagnetic region, as in the pure
Heisenberg antiferromagn... | 1995-12-21 | 2016-08-31 | [
"cond-mat"
] | Yoshihiko Nonomura |
cond-mat/9512143 | Polarons and bipolarons in strongly interacting electron-phonon systems | The Holstein Hubbard and Holstein t--J models are studied for a wide range of
phonon frequencies, electron--electron and electron--phonon interaction
strengths on finite lattices with up to ten sites by means of direct Lanczos
diagonalization. Previously the necessary truncation of the phononic Hilbert
space caused ser... | 1995-12-21 | 2009-10-28 | [
"cond-mat"
] | G. Wellein, H. R\"oder and H. Fehske |
cond-mat/9512139 | Absence of backscattering at integrable impurities in one-dimensional
quantum many-body systems | We study interacting one dimensional (1D) quantum lattice gases with
integrable impurities. These model Hamiltonians can be derived using the
quantum inverse scattering method for inhomogeneous models and are by
construction integrable. Absence of backscattering at the impurities is shown
to be the characteristic featu... | 1995-12-20 | 2020-05-04 | [
"cond-mat"
] | A. Punnoose (IISc), H.-P. Eckle (Tours) and R. A. R\"omer (Aachen) |
cond-mat/9512140 | Spatial scaling in fracture propagation in dilute systems | The geometry of fracture patterns in a dilute elastic network is explored
using molecular dynamics simulation. The network in two dimensions is subjected
to a uniform strain which drives the fracture to develop by the growth and
coalescence of the vacancy clusters in the network. For strong dilution, it has
been shown ... | 1995-12-20 | 2015-06-25 | [
"cond-mat"
] | P. Ray and G. Date |
cond-mat/9512141 | Optical Conductivity of a t--J Ladder | The optical conductivity $\sigma(\omega )$ of a doped two-leg t--J ladder is
calculated for an electric field polarized parallel to the legs of the ladder.
The conductivity has a Drude weight proportional to the hole doping and an
apparent threshold for absorption (a pseudo gap) which may be associated with
the energy ... | 1995-12-20 | 2009-10-28 | [
"cond-mat"
] | C. A. Hayward, D. Poilblanc and D. J. Scalapino |
cond-mat/9512134 | Theory for the Doping Dependence of Spin Fluctuation Induced Shadow
States in High-T$_{c}$ Superconductors | We analyze the doping dependence of the intensity and energetical position of
shadow states in high -T$_{c}$ superconductors within the 2D Hubbard model and
using our recently developed numerical method for the self consistent summation
of bubble and ladder diagrams. It is shown that shadow states resulting from
short ... | 1995-12-19 | 2009-10-28 | [
"cond-mat"
] | M. Langer, J. Schmalian, S. Grabowski, and K.H. Bennemann |
cond-mat/9512136 | Metal-insulator transition in highly conducting oriented polymers | We suggest that highly conducting oriented polymers with a fibril structure
can be modeled by a regular lattice of disordered metallic wires with a random
first-neighbor interwire coupling which mimics the cross-links between fibrils.
We show that such a model can be described by a non-linear sigma model. Within
a one-... | 1995-12-19 | 2024-10-04 | [
"cond-mat"
] | N. Dupuis |
cond-mat/9512138 | Disordered Flat Phase and Phase Diagram for Restricted Solid on Solid
Models of Fcc(110) Surfaces | We discuss the results of a study of restricted solid-on-solid models for fcc
(110) surfaces. These models are simple modifications of the exactly solvable
BCSOS model, and are able to describe a $(2\times 1)$ missing-row reconstructed
surface as well as an unreconstructed surface. They are studied in two
different way... | 1995-12-19 | 2009-10-28 | [
"cond-mat"
] | G. Santoro, M. Vendruscolo, S. Prestipino, and E. Tosatti |
cond-mat/9512137 | Finite-Size Scaling and Universality in the Spin 1 Quantum XY Chain | The spin-1 XY chain in a transverse field is studied using finite-size
scaling. The ground state phase diagram displays a paramagnetic, an ordered
ferromagnetic and an ordered oscillatory phase. The paramagnetic-ferromagnetic
transition line belongs to the universality class of the 2D Ising model. Along
this line, univ... | 1995-12-19 | 2009-10-28 | [
"cond-mat"
] | Walter Hofstetter and Malte Henkel |
cond-mat/9512135 | Errors in Monte Carlo simulations using shift register random number
generators | We report large systematic errors in Monte Carlo simulations of the
tricritical Blume-Capel model using single spin Metropolis updating. The error,
manifest as a $20\%$ asymmetry in the magnetisation distribution, is traced to
the interplay between strong triplet correlations in the shift register random
number generat... | 1995-12-19 | 2015-06-25 | [
"cond-mat"
] | F. Schmid and N.B. Wilding |
cond-mat/9512132 | Shadow bands in overdoped Bi_2Sr_2CaCu_2O_{8+x} | We performed angle-resolved photoemission experiments on overdoped single
crystal $Bi_2Sr_2CaCu_2O_{8+x}$ samples with Tc values as low as 55K and very
narrow transitions as measured by AC susceptibility. The photoemission data
indicate the presence of a ``shadow'' peak in the quasiparticle spectral
function $A(\omega)... | 1995-12-18 | 2007-05-23 | [
"cond-mat"
] | S. La Rosa, R.J. Kelley, C. Kendziora, G. Margaritondo, M. Onellion
and A. Chubukov |
cond-mat/9512125 | Two-electron state in a disordered 2D island: pairing caused by the
Coulomb repulsion | We show the existence of bound two-electron states in an almost depleted
two-dimensional island. These two-electron states are carried by special
compact configurations of four single-electron levels. The existence of these
states does not require phonon mediation, and is facilitated by the
disorder-induced potential r... | 1995-12-18 | 2009-10-28 | [
"cond-mat"
] | M. E. Raikh (1), L. I. Glazman (2), and L. E. Zhukov (1) ((1) Physics
Department, University of Utah, (2) Theoretical Physics Institute and
Department of Physics, University of Minnesota) |
cond-mat/9512130 | The Correlated Block Renormalization Group | We formulate the standard real-space renormalization group method in a way
which takes into account the correlation between blocks. This is achieved in a
dynamical way by means of operators which reflect the influence on a given
block of its neighbours. We illustrate our method in the example of the
tight-binding model... | 1995-12-18 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | Miguel A. Martin-Delgado, Javier Rodriguez-Laguna and German Sierra |
cond-mat/9512128 | On the localization transition in three dimensions: Monte-Carlo
simulation of a non-linear $\sigma$-model | We present a combination of analytical and numerical calculations for the
critical behavior of a supersymmetric non-linear $\sigma$-model within the
context of the localization transition of a disordered one-electron system. As
a result, we obtain a localization length exponent and a set of inverse
participation number... | 1995-12-18 | 2009-10-28 | [
"cond-mat"
] | Thomas Dupr\'e |
cond-mat/9512126 | Soft X-ray Fluorescence Study of Buried Silicides in
Antiferromagnetically Coupled Fe/Si Multilayer | Soft x-ray fluorescence spectroscopy has been employed to obtain information
about the Si-derived valence band states of Fe/Si multilayers. The valence band
spectra are quite different for films with and without antiferromagnetic
interlayer exchange coupling, demonstrating that these multilayers have
different silicide... | 1995-12-18 | 2009-10-28 | [
"cond-mat"
] | J.A. Carlisle, A. Chaiken, R.P. Michel, L.J. Terminello, J.J. Jia and
T.A. Callcott, and D.L. Ederer |
cond-mat/9512133 | Anisotropic Localization Effect in Layered Materials | We investigate localization properties in the highly anisotropic and
intrinsically disordered layered material, which is analogous to high-Tc
cuprates. By varying the anisotropy of the system which is parameterized by the
interlayer hopping $tp$, we find a crossover from two-dimensional (2D) to
three-dimensional (3D) b... | 1995-12-18 | 2009-10-28 | [
"cond-mat"
] | Y. Zha and D. Z. Liu |
cond-mat/9512131 | Raman scattering in a two-layer antiferromagnet | Two--magnon Raman scattering is a useful tool to verify recent suggestions
concerning the value of the interplanar exchange constant in antiferromagnetic
two--layer systems, such as $YBa_2Cu_3O_{6+x}$. We present a theory for Raman
scattering in a two--layer antiferromagnet. We study the spectra for the
electronic and ... | 1995-12-18 | 2009-10-28 | [
"cond-mat"
] | Dirk K. Morr, Andrey V. Chubukov, Arno P. Kampf and G. Blumberg |
cond-mat/9512129 | Orientational Glass Transition | The static behavior of orientational glasses is discussed in terms of a
replica theory based on the infinite range random bond--random field model. A
general version of the model applicable to dipolar and quadrupolar glasses is
presented using a symmetry-adapted representation for the order parameter
fields. Numerical ... | 1995-12-18 | 2007-05-23 | [
"cond-mat"
] | R. Pirc, B. Tadic, and R. Blinc (Jo\v{z}ef Stefan Institute,
Ljubljana, Slovenia) |
cond-mat/9512127 | Subband energy in two-band delta-doped semiconductors | We study electron dynamics in a two-band delta-doped semiconductor within the
envelope-function approximation. Using a simple parametrization of the
confining potential arising from the ionized donors in the delta-doping layer,
we are able to find exact solutions of the Dirac-type equation describing the
coupling of ho... | 1995-12-18 | 2009-10-28 | [
"cond-mat"
] | F. Dominguez-Adame |
cond-mat/9512119 | Two Lane Traffic Simulations using Cellular Automata | We examine a simple two lane cellular automaton based upon the single lane CA
introduced by Nagel and Schreckenberg. We point out important parameters
defining the shape of the fundamental diagram. Moreover we investigate the
importance of stochastic elements with respect to real life traffic. | 1995-12-15 | 2015-06-25 | [
"cond-mat",
"adap-org",
"nlin.AO"
] | Marcus Rickert (1 and 2), Kai Nagel (2), Michael Schreckenberg (3),
Andreas Latour (4) ((1) Center for Parallel Computing, Cologne, Germany, (2)
TSASA, Los Alamos National Lab, (3) Gerhard-Mercator-University, Duisburg,
Germany, (4) Institute of Theoretical Physics, University of Cologne,
Germany) |
cond-mat/9512118 | Absence of gap for infinite half--integer spin ladders with an odd
number of legs | A proof is presented for the absence of gap for spin $1/2$ ladders with an
odd number of legs, in the infinite leg length limit. This result is relevant
to the current discussion of coupled one--dimensional spin systems, a physical
realization of which are vanadyl pyrophosphate, (VO)$_2$P$_2$O$_7$, and
stoichiometric S... | 1995-12-15 | 2009-10-28 | [
"cond-mat"
] | A. G. Rojo |
cond-mat/9512120 | The spectral gap of the ferromagnetic XXZ chain | We prove that the spectral gap of the spin-1/2 ferromagnetic XXZ chain with
Hamiltonian $H=-\sum_x S^{(1)}_xS^{(1)}_{x+1}+S^{(2)}_xS^{(2)}_{x+1} +\Delta
S^{(3)}_xS^{(3)}_{x+1}$, is given by $\Delta-1$ for all $\Delta\geq 1$. This is
the gap in the spectrum of the infinite chain in any of its ground states, the
translat... | 1995-12-15 | 2007-05-23 | [
"cond-mat"
] | Tohru Koma (Gakushuin University), Bruno Nachtergaele (Princeton
University) |
cond-mat/9512122 | Role of Layering Oscillations at Liquid Metal Surfaces in Bulk
Recrystallization and Surface Melting | The contrasting melting behavior of different surface orientations in metals
can be explained in terms of a repulsive or attractive effective interaction
between the solid-liquid and the liquid-vapor interface. We show how a crucial
part of this interaction originates from the layering effects near the liquid
metal sur... | 1995-12-15 | 2009-10-28 | [
"cond-mat",
"mtrl-th"
] | Orio Tomagnini (1), Furio Ercolessi (2 and 3), Simonetta Iarlori (1),
Francesco D. Di Tolla (2 and 3), and Erio Tosatti (2, 3 and 4) ((1)
IBM-ECSEC, Rome, Italy, (2) INFM, Italy, (3) SISSA-ISAS, Trieste, Italy, (4)
ICTP, Trieste, Italy) |
cond-mat/9512117 | Big bang simulation in superfluid 3He-B -- Vortex nucleation in
neutron-irradiated superflow | We report the observation of vortex formation upon the absorption of a
thermal neutron in a rotating container of superfluid $^3$He-B. The nuclear
reaction n + $^3$He = p + $^3$H + 0.76MeV heats a cigar shaped region of the
superfluid into the normal phase. The subsequent cooling of this region back
through the superfl... | 1995-12-15 | 2009-10-28 | [
"cond-mat",
"gr-qc",
"hep-th"
] | V.M.H. Ruutu, V.B. Eltsov, A.J. Gill, T.W.B. Kibble, M. Krusius, Yu.G.
Makhlin, B. Placais, G.E. Volovik, Wen Xu |
cond-mat/9512124 | Investigation on the Ground States of a Model Thin-Film Superconductor
on a Sphere | We consider the problem of finding the ground state of a model type-II
superconductor on the two-dimensional surface of a sphere, penetrated by $N$
vortices. Numerical work shows the ground states to consist of a triangular
network of the vortices with twelve five-coordinated centres. Values of $N$ are
found with parti... | 1995-12-15 | 2009-10-28 | [
"cond-mat"
] | M.J.W. Dodgson (University of Manchester) |
cond-mat/9512121 | Nonlocal conductivity in the vortex-liquid regime | We investigate the nonlocal conductivity calculated from the time-dependent
Ginzburg-Landau equation. When the fluctuations of the vector potential are
negligible, the high-temperature (Gaussian) and low-temperature (flux-flow)
forms of the uniform conductivity withan an ab plane (sigma_yy) are essentially
identical. W... | 1995-12-15 | 2007-05-23 | [
"cond-mat"
] | T. Blum and M.A. Moore |
cond-mat/9512123 | Vortices in a Thin Film Superconductor with a Spherical Geometry | We report results from Monte Carlo simulations of a thin film superconductor
in a spherical geometry within the lowest Landau level approximation. We
observe the absence of a phase transition to a low temperature vortex solid
phase with these boundary conditions; the system remains in the vortex liquid
phase for all ac... | 1995-12-15 | 2009-10-28 | [
"cond-mat"
] | M.J.W. Dodgson and M.A. Moore (University of Manchester) |
cond-mat/9512113 | Disclination Asymmetry in Deformable Hexatic Membranes and the
Kosterlitz-Thouless Transitions | A disclination in a hexatic membrane favors the development of Gaussian
curvature localized near its core. The resulting global structure of the
membrane has mean curvature, which is disfavored by curvature energy. Thus a
membrane with an isolated disclination undergoes a buckling transition from a
flat to a buckled st... | 1995-12-14 | 2009-10-28 | [
"cond-mat"
] | Jeong-Man Park and T. C. Lubensky (Univ. of Pennsylvania) |
cond-mat/9512112 | Erratum: Exact Ground State Energy of the Strong-Coupling Polaron | The polaron has been of interest in condensed matter theory and field theory
for about half a century, especially the limit of large coupling constant. It
was not until 1983, however, that a proof of the asymptotic formula for the
ground state energy was finally given by using difficult arguments involving
the large de... | 1995-12-14 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | E.H. Lieb, L.E. Thomas |
cond-mat/9512116 | Polymerization in a Ferromagnetic Spin Model with Threshold | We propose a spin model with a new kind of ferromagnetic interaction, which
may be called {\it ferromagnetic coupling with threshold}. In this model the
contribute of a given spin to the total energy has only two possible values and
depends on the number of parallel spins among its nearest and next to the
nearest neigh... | 1995-12-14 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | Emilio N. M. Cirillo, Sebastiano Stramaglia |
cond-mat/9512110 | Analytical and computational study of magnetization switching in kinetic
Ising systems with demagnetizing fields | An important aspect of real ferromagnetic particles is the demagnetizing
field resulting from magnetostatic dipole-dipole interaction, which causes
large particles to break up into domains. Sufficiently small particles,
however, remain single-domain in equilibrium. This makes such small particles
of particular interest... | 1995-12-14 | 2008-12-18 | [
"cond-mat",
"adap-org",
"hep-lat",
"mtrl-th",
"nlin.AO"
] | Howard L. Richards, Mark A. Novotny, and Per Arne Rikvold |
cond-mat/9512114 | Phonon-drag effects on thermoelectric power | We carry out a calculation of the phonon-drag contribution $S_g$ to the
thermoelectric power of bulk semiconductors and quantum well structures for the
first time using the balance equation transport theory extended to the weakly
nonuniform systems. Introducing wavevector and phonon-mode dependent relaxation
times due ... | 1995-12-14 | 2009-10-28 | [
"cond-mat"
] | M.W. Wu, N.J.M. Horing, and H.L. Cui |
cond-mat/9512115 | Comment on "Spatial Correlation in Quantum Chaotic Systems with
Time-Reversal Symmetry: Theory and Experiment" by V. N. Prigodin et al
[cond-mat/9504089] | We show that the results of Prigodin et al can be reproduced and simplified
by making use of Berry's conjecture that the energy eigenfunctions in a
quantized chaotic system are gaussian random variables. | 1995-12-14 | 2009-10-28 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Mark Srednicki |
cond-mat/9512109 | Sine-Gordon Field Theory for the Kosterlitz-Thouless Transitions on
Fluctuating Membranes | In the preceding paper, we derived Coulomb-gas and sine-Gordon Hamiltonians
to describe the Kosterlitz-Thouless transition on a fluctuating surface. These
Hamiltonians contain couplings to Gaussian curvature not found in a rigid flat
surface. In this paper, we derive renormalization-group recursion relations for
the si... | 1995-12-13 | 2009-10-28 | [
"cond-mat"
] | Jeong-Man Park and T. C. Lubensky (Univ. of Pennsylvania) |
cond-mat/9512105 | Non-magnetic impurity scattering in a $d_{x^2 - y^2}$ superconductor
near a van Hove point: Zn versus Ni in the cuprates | We consider the effect of non-magnetic impurities in a $d_{x^2 - y^2}$
superconductor with $\ef$ close to a van Hove singularity. It is shown that the
non-trivial density of states (DOS) allows for resonant scattering already at
intermediate potential strengths $|u| \approx 1-2$eV. The residual DOS at
$\ef$, and the \t... | 1995-12-13 | 2009-10-28 | [
"cond-mat",
"supr-con"
] | Roland Fehrenbacher |
cond-mat/9512101 | Topological Order in the Vortex Glass Phase of High-Temperature
Superconductors | The stability of a vortex glass phase with quasi-long-range positional order
is examined for a disordered layered superconductor. The role of topological
defects is investigated using a detailed scaling argument, supplemented by a
variational calculation. The results indicate that topological order is
preserved for a {... | 1995-12-13 | 2009-10-28 | [
"cond-mat"
] | J. Kierfeld, T. Nattermann, T. Hwa |
cond-mat/9512106 | Quantum transport in a multiwalled carbon nanotube | We report on electrical resistance measurements of an individual carbon
nanotube down to a temperature T=20 mK. The conductance exhibits a ln T
dependence and saturates at low temperature. A magnetic field applied
perpendicular to the tube axis, increases the conductance and produces
aperiodic fluctuations. The data fi... | 1995-12-13 | 2009-10-28 | [
"cond-mat"
] | L. Langer, V. Bayot, E. Grivei, J.-P. Issi, J.P. Heremans, C.H. Olk,
L. Stockman, C. Van Haesendonck, Y. Bruynseraede |
cond-mat/9512102 | Memory Loss and Auger Processes in a Many Body Theory of Charge Transfer | Charge transfer between hyperthermal alkali atoms and metallic scattering
surfaces is an experimental and theoretical arena for many-body interactions.
To model new facets, we use a generalized time-dependent Newns-Anderson
Hamiltonian which includes electron spin, multiple atomic orbitals with image
shifted levels, in... | 1995-12-13 | 2009-10-28 | [
"cond-mat",
"atom-ph",
"chem-ph"
] | A.V. Onufriev and J. B. Marston |
cond-mat/9512103 | First-principles studies of modulated Co/Cu superlattices with strongly
and weakly exchange-biased Co-monolayers leading to a ferrimagnetic ground
state | First-principles calculations have been performed in order to determine
effective exchange integrals between strongly and weakly exchange-biased Co
monolayers in the modulated CoCu$_2$/CoCu$_n$ superlattices. For $3\le n\le 6$
it has been found that the respective exchange integrals have opposite signs
and differ for $... | 1995-12-13 | 2007-05-23 | [
"cond-mat"
] | S. Krompiewski (1), F. S\"uss (2) and U. Krey (2) ((1) Inst.of
Molecular Physics, Polish Academy of Sciences, Poznan, (2) Inst.of Physics
II, University of Regensburg, Regensburg) |
cond-mat/9512107 | Kosterlitz-Thouless Transitions on Fluctuating Surfaces | We investigate the Kosterlitz-Thouless transition for hexatic order on a free
fluctuating membrane and derive both a Coulomb gas and a sine-Gordon
Hamiltonian to describe it. In the former, both disclinations and Gaussian
curvature contribute to the charge density. In the latter, there is a linear
coupling between a sc... | 1995-12-13 | 2007-05-23 | [
"cond-mat"
] | Jeong-Man Park and T.C. Lubensky (University of Pennsylvania) |
cond-mat/9512100 | Boltzmann equation approach for transport in systems subject to
microwave irradiation | We calculate the electronic transport properties of a system which is
irradiated by a homogeneous microwave field. Within a Boltzmann equation
approach, a general expression for the conductivity tensor is derived and
evaluated for a quasi one-dimensional ballistic quantum wire and a two
dimensional system with impurity... | 1995-12-13 | 2009-10-28 | [
"cond-mat"
] | Tobias Brandes (Gakushuin, Japan) |
cond-mat/9512104 | Strong coupling probe for the Kardar-Parisi-Zhang equation | We present an exact solution of the {\it deterministic} Kardar-Parisi-Zhang
(KPZ) equation under the influence of a local driving force $f$. For substrate
dimension $d \le 2$ we recover the well-known result that for arbitrarily small
$f>0$, the interface develops a non-zero velocity $v(f)$. Novel behaviour is
found in... | 1995-12-13 | 2009-10-28 | [
"cond-mat"
] | T.J. Newman, Harald Kallabis |
cond-mat/9512108 | Topological Defects on Fluctuating Surfaces: General Properties and the
Kosterlitz-Thouless Transition | We investigate the Kosterlitz-Thouless transition for hexatic order on a free
fluctuating membrane and derive both a Coulomb gas and a sine-Gordon
Hamiltonian to describe it. The Coulomb-gas Hamiltonian includes charge
densities arising from disclinations and from Gaussian curvature. There is an
interaction coupling th... | 1995-12-13 | 2009-10-28 | [
"cond-mat"
] | Jeong-Man Park and T. C. Lubensky (Univ. of Pennsylvania) |
cond-mat/9512091 | Quantum Monte Carlo evidence for superconductivity in the three-band
Hubbard model in two dimensions | A possibility of the electronic origin of the high-temperature
superconductivity in cuprates is probed with the quantum Monte Carlo method by
revisiting the three-band Hubbard model comprising Cu$3d_{x^2-y^2}$ and
O$2p_\sigma$ orbitals. The $d_{x^2-y^2}$ pairing correlation is found to turn
into an increasing function ... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | Kazuhiko Kuroki, Hideo Aoki |
cond-mat/9512089 | Electron-phonon interactions on a single-branch quantum Hall edge | We consider the effect of electron-phonon interactions on edge states in
quantum Hall systems with a single edge branch. The presence of electron-phonon
interactions modifies the single-particle propagator for general quantum Hall
edges, and, in particular, destroys the Fermi liquid even at integer filling.
The effect ... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | O. Heinonen, Sebastian Eggert |
cond-mat/9512095 | Spatial structure of anomalously localized states in disordered
conductors | The spatial structure of wave functions of anomalously localized states (ALS)
in disordered conductors is studied in the framework of the $\sigma$--model
approach. These states are responsible for slowly decaying tails of various
distribution functions. In the quasi-one-dimensional case, properties of ALS
governing the... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | Alexander D.Mirlin |
cond-mat/9512092 | Dynamical Franz-Keldysh effect | We introduce and analyze the properties of dynamical Franz-Keldysh effect,
i.e. the change of density-of-states, or absorption spectra, of semiconductors
under the influence of {\it time-dependent} electric fields. In the case of a
harmonic time-dependence, we predict the occurence of significant fine
structure, both b... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | A. P. Jauho and K. Johnsen (MIC, Tech. Univ. of Denmark) |
cond-mat/9512090 | Composite quasiparticle formation and the low-energy effective
Hamiltonians of the one- and two-dimensional Hubbard Model | We investigate the effect of hole doping on the strong-coupling Hubbard model
at half-filling in spatial dimensions $D\ge 1$. We start with an
antiferromagnetic mean-field description of the insulating state, and show that
doping creates solitons in the antiferromagnetic background. In one dimension,
the soliton is top... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | Junwu Gan, Dung-Hai Lee and Per Hedegard |
cond-mat/9512093 | Electron Structure Near Abrupt Edges in 2DEG under Strong Magnetic Field | Energies and wave functions of edge states in twodimensional electron gas are
evaluated for a finite step potential barrier model. The spectrum, instead of
smooth bending of Landau branches in the vicinity of the barrier acquires a
steplike form; unexpected edge plateaus and significant energy gap reduction
take place ... | 1995-12-12 | 2015-06-25 | [
"cond-mat"
] | I.Bartos and B.Rosenstein |
cond-mat/9512094 | Insulator-to-metal transition in Kondo insulators under strong magnetic
field | Magnetization curve and changes of the single-particle excitation spectra by
magnetic field are calculated for the periodic Anderson model at half-filling
in infinite spatial dimension by using the exact diagonalization method. It is
found that the field-induced insulator-to-metal transition occurs at a critical
field ... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | Tetsuro Saso and Masatoshi Itoh (Dept. Physics, Saitama Univ. Japan) |
cond-mat/9512096 | Magnetic Properties of the t-J Model in the Dynamical Mean-Field Theory | We present a theory for the spin correlation function of the t-J model in the
framework of the dynamical mean-field theory. Using this mapping between the
lattice and a local model we are able to obtain an intuitive expression for the
non-local spin susceptibility, with the corresponding local correlation
function as i... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | Thomas Pruschke, Qi Qin, Thomas Obermeier and Joachim Keller
(University of Regensburg, Germany) |
cond-mat/9512099 | Conformal Field Theory Approach to the Kondo Effect | Recently, a new approach, based on boundary conformal field theory, has been
applied to a variety of quantum impurity problems in condensed matter and
particle physics. A particularly enlightening example is the multi-channel
Kondo problem. In this review some earlier approaches to the Kondo problem are
discussed, the ... | 1995-12-12 | 2011-04-15 | [
"cond-mat",
"hep-th"
] | Ian Affleck |
cond-mat/9512098 | Destruction of integer quantum Hall effect at strong disorder: A
numerical study | A breakdown of integer quantum Hall effect (IQHE) at strong disorder is
studied numerically in a lattice model. We find a generic sequence by which the
integer quantum Hall plateaus disappear: higher IQHE plateaus always vanish
earlier than lower ones. We show that extended levels between these plateaus do
not float up... | 1995-12-12 | 2007-05-23 | [
"cond-mat"
] | D.N. Sheng, Z. Y. Weng, and Q. Gao |
cond-mat/9512081 | Signatures of electron correlations in the transport properties of
quantum dots | The transition matrix elements between the correlated $N$ and $N\!+\!1$
electron states of a quantum dot are calculated by numerical diagonalization.
They are the central ingredient for the linear and non--linear transport
properties which we compute using a rate equation. The experimentally observed
variations in the ... | 1995-12-12 | 2009-10-28 | [
"cond-mat"
] | Kristian Jauregui, Wolfgang H\"ausler, Dietmar Weinmann and Bernhard
Kramer |
cond-mat/9512097 | Mechanism of thermally activated c-axis dissipation in layered
High-T$_c$ superconductors at high fields | We propose a simple model which explains experimental behavior of $c$-axis
resistivity in layered High-T$_c$ superconductors at high fields in a limited
temperature range. It is generally accepted that the in-plane dissipation at
low temperatures is caused by small concentration of mobile pancake vortices
whose diffusi... | 1995-12-12 | 2009-10-28 | [
"cond-mat",
"supr-con"
] | A.E. Koshelev |
cond-mat/9512087 | Time correlations in 1D quantum impurity problems | We develop in this letter an analytical approach using form- factors to
compute time dependent correlations in integrable quantum impurity problems. As
an example, we obtain for the first time the frequency dependent conductivity
$G(\omega)$ for the tunneling between the edges in the $\nu=1/3$ fractional
quantum Hall e... | 1995-12-12 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | F. Lesage, H. Saleur, S. Skorik |
cond-mat/9512069 | Roughening Transition in a One-Dimensional Growth Process | A class of nonequilibrium models with short-range interactions and sequential
updates is presented. The models describe one dimensional growth processes
which display a roughening transition between a smooth and a rough phase. This
transition is accompanied by spontaneous symmetry breaking, which is described
by an ord... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | Uri Alon, Martin Evans, Haye Hinrichsen and David Mukamel |
cond-mat/9512072 | Domain Wall in the Spin-S Quantum Ising Chain | Domain walls in the spin S quantum Ising chain at zero temperature are
considered. Quantum effects prevent the walls from being sharp and delocalize
the exact eigenstates. The absence of a characteristic length of the domain
walls is reflected in the finite-size scaling of the spectrum of the
Hamiltonian. | 1995-12-11 | 2007-05-23 | [
"cond-mat"
] | Malte Henkel |
cond-mat/9512088 | Bound states and scattering in quantum waveguides coupled laterally
through a boundary window | We consider a pair of parallel straight quantum waveguides coupled laterally
through a window of a width $ \ell $ in the common boundary. We show that such
a system has at least one bound state for any $ \ell>0 $. We find the
corresponding eigenvalues and eigenfunctions numerically using the
mode--matching method, and ... | 1995-12-11 | 2009-10-28 | [
"cond-mat",
"quant-ph"
] | P. Exner, P. \v{S}eba, M. Tater, D. Van\v{e}k |
cond-mat/9512080 | One Dimensional Lattice Models of Electrons with 1/r^2 Hopping and
Exchange | This talk reviews some recent progresses in the studies of low dimensional
electronic models of strong correlations. | 1995-12-11 | 2007-05-23 | [
"cond-mat"
] | Ch. Gruber and D. F. Wang |
cond-mat/9512086 | Geodesics around a dislocation | One method of gaining some insight into the motion of particles in a medium
with topological defects (e.g., electrons in a dislocated metal) is to look at
the geodesics of the medium around the defect. In this work the Hamilton-Jacobi
equation for the geodesics in a continuous medium containing a torsional
defect, an e... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | Fernando Moraes (IAS, Princeton) |
cond-mat/9512070 | An algorithm for series expansions based on hierarchical rate equations | We propose a computational method to obtain series expansions in powers of
time for general dynamical systems described by a set of hierarchical rate
equations. The method is generally applicable to problems in both equilibrium
and nonequilibrium statistical mechanics such as random sequential adsorption,
diffusion-rea... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | Chee Kwan Gan and Jian-Sheng Wang (National University of Singapore) |
cond-mat/9512085 | A magnetic field diagnostic for sonoluminescence | This study is motivated by the extraordinary process of single bubble
sonoluminescence (SBSL), where an acoustically driven spherical shock is
thought to power the emitted radiation. We propose new experiments using an
external magnetic field which can induce anisotropies in both the shock
propagation and radiation pat... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | Tom Chou and Eric G. Blackman (LASSP, Cornell University and Institute
of Astronomy, Cambridge University) |
cond-mat/9512079 | Free Energies of Isolated 5- and 7-fold Disclinations in Hexatic
Membranes | We examine the shapes and energies of 5- and 7-fold disclinations in
low-temperature hexatic membranes. These defects buckle at different values of
the ratio of the bending rigidity, $\kappa$, to the hexatic stiffness constant,
$K_A$, suggesting {\em two} distinct Kosterlitz-Thouless defect proliferation
temperatures. ... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | Michael W. Deem (Harvard University), David R. Nelson (Harvard
University) |
cond-mat/9512083 | Low-Energy Excitations in an Incipient Antiferromagnet | We present fully self-consistent calculations in the fluctuation exchange
approximation for the half-filled Hubbard model in 2D. A non-fermi liquid state
evolves with decreasing temperature in this self-consistent model of coupled
spin fluctuations and quasiparticles. The mean field phase transition to
long-range antif... | 1995-12-11 | 2015-06-25 | [
"cond-mat"
] | D.W. Hess, J.J. Deisz, and J.W. Serene |
cond-mat/9512084 | Incipient antiferromagnetism and low-energy excitations in the
half-filled two-dimensional Hubbard model | We present single-particle and thermodynamic properties of the half-filled
single-band Hubbard model in 2D calculated in the self-consistent fluctuation
exchange approximation. The low-energy excitations at moderate temperatures and
small $U$ are quasiparticles with a short lifetime. As the temperature is
lowered, coup... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | J.J. Deisz(a), D.W. Hess(b), and J.W. Serene(a) ((a) Department of
Physics, Georgetown University (b) Complex Systems Theory Branch, Naval
Research Laboratory, Washington, D.C) |
cond-mat/9512077 | Statistics of skyrmions in Quantum Hall systems | We analyze statistical interactions of skyrmions in the quantum Hall system
near a critical filling fraction in the framework of the Ginzburg-Landau model.
The phase picked up by the wave-function during an exchange of two skyrmions
close to $\nu=1/(2n+1)$ is $\pi[S+1/2(2n+1)]$, where $S$ is the skyrmion's
spin. In the... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | Jacek Dziarmaga |
cond-mat/9512073 | Magnetization of a Diffusive Ring: Beyond the Perturbation Theory | Average persistent current over a set of diffusive metallic rings with fixed
number of electrons is considered. We study the the case where the phase
breaking time is much greater than an inverse average inter-level distance. In
such a situation, many return events for an electron have to be taken into
account. As a re... | 1995-12-11 | 2008-02-03 | [
"cond-mat"
] | V. V. Afonin and Yu. M. Galperin |
cond-mat/9512082 | Coulomb Blockade of Tunneling Through a Double Quantum Dot | We study the Coulomb blockade of tunneling through a double quantum dot. The
temperature dependence of the linear conductance is strongly affected by the
inter-dot tunneling. As the tunneling grows, a crossover from
temperature-independent peak conductance to a power-law suppression of
conductance at low temperatures i... | 1995-12-11 | 2009-10-28 | [
"cond-mat"
] | K.A. Matveev (MIT), L.I. Glazman (U. Minn.), and H.U. Baranger (Bell
Labs) |
cond-mat/9512074 | On the Phase Diagram of the q->1 Extended Potts Model and Lattice Animal
Collapse | The phase diagram of the two-dimensional extended q-states Potts model is
investigated in the q->1 limit. This is equivalent to studying the phase
diagram of a two-dimensional infinite interacting lattice animal. An exact
solution on the Bethe lattice and a Migdal-Kadanoff renormalization group
calculation predict a li... | 1995-12-11 | 2007-05-23 | [
"cond-mat"
] | Malte Henkel |
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