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Condensed Matter papers — page 207

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Nontrivial resonance of nanoscale uniaxial magnets to alternating field
How nanoscale uniaxial magnets respond to an alternating field is studied by direct numerical calculation. A nontrivial oscillation of the magnetization is found, which is analyzed in terms of the…
Seiji Miyashita, Keiji Saito, Hans De RaedtJun 27, 1997
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Charge Fluctuation Forces Between Stiff Polyelectrolytes in Salt Solution: Pairwise Summability Re-examined
We formulate low-frequency charge-fluctuation forces between charged cylinders - parallel or skewed - in salt solution: forces from dipolar van der Waals fluctuations and those from the correlated…
R. Podgornik, V. A. ParsegianJun 26, 1997
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Some stochastic phenomena in a driven double-well system
We study the overdamped motion of a Brownian particle in a driven double-well system to understand various physical phenomena observed experimentally. These phenomena include hysteresis, stochastic…
Mangal C. Mahato, A. M. JayannavarJun 26, 1997
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Dissipative Electron Transport through Andreev Interferometers
We consider the conductance of an Andreev interferometer, i.e., a hybrid structure where a dissipative current flows through a mesoscopic normal (N) sample in contact with two superconducting (S)…
H. A. Blom, A. Kadigrobov, A. M. Zagoskin et al.Jun 24, 1997
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Anomalous transport: a mathematical framework
We develop a mathematical framework allowing to study anomalous transport in homogeneous solids. The main tools characterizing the anomalous transport properties are spectral and diffusion exponents…
H. Schulz-Baldes, J. BellissardJun 24, 1997
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Description of recent large-q neutron inclusive scattering data from liquid 4He
We report dynamical calculations for large-q structure functions of liquid 4He at T=1.6 and 2.3 K and compare those with recent MARI data. We extend those calculations far beyond the…
A. S. Rinat, M. F. Taragin, F. Mazzanti et al.Jun 22, 1997
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Local Polariton States in Polar Crystals with Impurities
We show that an impurity embedded in an ionic crystal can give rise to a novel kind of local states. These states exist within a polariton gap of a material and are a mix of excitations of the…
Lev I. Deych, Alexander A. LisyanskyJun 20, 1997
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Self-organized criticality in deterministic systems with disorder
Using the Bak-Sneppen model of biological evolution as our paradigm, we investigate in which cases noise can be substituted with a deterministic signal without destroying Self-Organized Criticality…
Paolo De Los Rios, Angelo Valleriani, Jose Luis VegaJun 20, 1997
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Transfer matrix of a spherical scatterer
We derive the off-shell scattering matrix for a spherical scatterer. The result obtained generalizes the off-on-shell matrix commonly used in the theory of scalar waves propagation in random media.
V. S. Podolsky, A. A. LisyanskyJun 20, 1997
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Random path averaging in multiple scattering theory
A new method of path averaging for waves propagating in a random dilute system of identical scatterers is developed. The scattering matrix of such a system is calculated. The method systematically…
V. S. Podolsky, A. A. LisyanskyJun 20, 1997
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Wave localization in generalized Thue-Morse superlattices with disorder
In order to study an influence of correlations on the localization properties of classical waves in random superlattices we introduce a generalized random Thue-Morse model as a four-state Markov…
Lev I. Deych, D. Zaslavsky, A. A. LisyanskyJun 20, 1997
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Comparison of the Spherical Averaged Pseudopotential Model with the Stabilized Jellium Model
We compare Kohn-Sham results (density, cohesive energy, size and effect of charging) of the Spherical Averaged Pseudopotential Model with the Stabilized Jellium Model for clusters of sodium and…
Armando Vieira, M. Begona Torres, Carlos Fiolhais et al.Jun 20, 1997
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Molecular conductors with two-chain orbitals
We investigate a theoretical model applicable to molecular conductors, such as TTP and M(dmit)2 salts [M=Ni, Pd, Pt], whose charge carriers orig inate from two kinds of molecular orbitals. The…
H. Tajima, J. Shiraishi, M. KohmotoJun 20, 1997
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Effects of long-range Coulomb interaction on the quantum transport in fractional quantum Hall edges
We study the effects of long-range Coulomb interaction (LRCI) on the quantum transport in FQH edges with ν=1/(2k+1). We consider two models, i.e., the quasi-particle tunneling (QPT) model and the…
Ken-ichiro Imura, Naoto NagaosaJun 19, 1997
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No spin diffusion in the spin 1/2 XXZ chain at T=∞: Numerical asymptotics
We analyze the recent numerical computations made by Fabricius, L\" ow and Stolze to show that the long time behavior of the zz correlation function of the spin 1/2 XXZ chain at T=∞ is…
Barry M. McCoyJun 19, 1997
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Continuous renormalization for fermions and Fermi liquid theory
I derive a Wick ordered continuous renormalization group equation for fermion systems and show that a determinant bound applies directly to this equation. This removes factorials in the recursive…
Manfred SalmhoferJun 18, 1997
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Fermi-Bose Correspondence at Finite Temperature
The correspondence between fermi-sea/bose-condensate displacements and the number-conserving product of two fermi/bose fields is generalised to finite temperatures. It is shown that the…
Girish S. SetlurJun 18, 1997
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Time Dependent Floquet Theory and Absence of an Adiabatic Limit
Quantum systems subject to time periodic fields of finite amplitude, lambda, have conventionally been handled either by low order perturbation theory, for lambda not too large, or by exact…
Daniel W. Hone, Roland Ketzmerick, Walter KohnJun 17, 1997
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Problem of formation of an emf in a semiconductor and its transfer to an external circuit
A general description is given of a process of formation of an emf in a medium with nonequilibrium carriers. The appearance of anomalous emfs is predicted for several semiconductor structures. Such…
Yu. G. Gurevich, V. B. YurchenkoJun 17, 1997
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Theory of thermoelectric effects when the temperature approximation is incorrect
The flow of a thermoelectric current through a semiconductor of submicron dimensions is analyzed. The rate of surface relaxation of the energy is assumed to be much higher than the rate of…
Yu. G. Gurevich, G. N. Logvinov, O. Yu. TitovJun 17, 1997
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Spatially nonuniform energy distribution of electrons in a submicron semiconductor film
The symmetric part of the distribution of the electrons in a semiconductor submicron film, placed between a heater and refrigeration unit, is derived and analyzed. It is shown that, in general, it is…
Yu. G. Gurevich, G. N. Logvinov, O. Yu. TitovJun 17, 1997
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Simulation of Quantum Field Theory and Gravity in Superfluid He-3
Superfluid phases of 3He are quantuim liquids with the interacting fermionic and bosonic fields. In many respects they can simulate the interacting quantum fields in the phyiscal vacuum. One can…
G. E. VolovikJun 17, 1997
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Disappearance of the Spin Gap in a Zn doped 2-Leg Ladder Compound Sr(Cu1-xZnx)2O3
An inelastic neutron scattering study was performed on a Zn-substituted spin-1/2 Heisenberg 2-leg ladder compound Sr(Cu1-xZnx)2O3 (x < 0.04) to investigate nonmagnetic impurity effects on the quantum…
M. Azuma, M. Takano, R. S. EcclestonJun 17, 1997
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Comment on ``One-Dimensional Disordered Bosonic Hubbard Model: A Density-Matrix Renormalization Group Study"
We present the phase diagram of the system obtained by continuous-time worldline Monte Carlo simulations, and demonstrate that the actual phase diagram is in sharp contrast with that found in Phys.…
Nikolai Prokof'ev, Boris SvistunovJun 17, 1997
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A single chain analysis of doped quasi one dimensional spin 1 compounds: paramagnetic versus spin 1/2 doping
We present a numerical study of single chain models of doped spin 1 compounds. We use low energy effective one-dimensional models for both the cases of paramagnetic and spin-1/2 doping. In the case…
M. Fabrizio, R. MélinJun 16, 1997
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