Comment on ``Energy Dependence of Electron Lifetime in Graphite Observed with Femtosecond Photoemission Spectroscopy'' (PRL 76, 483(1996).)We comment on the theoretical interpretations applied to a recent experiment on electron lifetime in graphite. We point out that the acoustic-plasmon excitations in a layered two-dimensional electron…Lian Zheng, S. Das Sarma·Jun 7, 1996SaveLearn
Ground states of a one-dimensional lattice-gas model with an infinite range nonconvex interaction. A numerical studyWe consider a lattice-gas model with an infinite range pairwise noncovex interaction. It might be relevant, for example, for adsorption of alkaline elements on W(112) and Mo(112). We study a…Cz. Oleksy, J. Lorenc·Jun 7, 1996SaveLearn
An exactly solvable lattice model for inhomogeneous interface growthWe study the dynamics of an exactly solvable lattice model for inhomogeneous interface growth. The interface grows deterministically with constant velocity except along a defect line where the growth…Gunter M. Schütz·Jun 7, 1996SaveLearn
Small polaron formation in the Holstein and Su-Schrieffer-Heeger models: The criteria from analytic and numerical analysesWe investigate the conditions leading to polaron formation for a single electron interacting with dispersionless optical phonons within the Holstein and the Su-Schrieffer-Heeger models. Both from…M. Capone, M. Grilli, W. Stephan·Jun 7, 1996SaveLearn
Fictitious Level Dynamics: A Novel Approach to Spectral Statistics in Disordered ConductorsWe establish a new approach to calculating spectral statistics in disordered conductors, by considering how energy levels move in response to changes in the impurity potential. We use this fictitious…J. T. Chalker, Igor V. Lerner, Robert A. Smith·Jun 7, 1996SaveLearn
Non-rigid hole band in the extended t-J modelThe dispersion of one hole in an extended t-J model with additional hopping terms to second and third nearest neighbours and a frustration term in the exchange part has been investigated. Two…R. Hayn, A. F. Barabanov, J. Schulenburg·Jun 7, 1996SaveLearn
Distribution of domain sizes in the zero temperature Glauber dynamics of the 1 D Potts modelFor the zero temperature Glauber dynamics of the q-state Potts model, we calculate the exact distribution of domain sizes by mapping the problem on an exactly soluble one-species coagulation model…Bernard Derrida, Reuven Zeitak·Jun 7, 1996SaveLearn
Supersymmetric matrix models and branched polymersWe solve a supersymmetric matrix model with a general potential. While matrix models usually describe surfaces, supersymmetry enforces a cancellation of bosonic and fermionic loops and only diagrams…J. Ambjorn, Y. Makeenko, K. Zarembo·Jun 7, 1996SaveLearn
Defect-induced condensation and central peak at elastic phase transitionsStatic and dynamical properties of elastic phase transitions under the influence of short--range defects, which locally increase the transition temperature, are investigated. Our approach is based on…M. Bulenda, F. Schwabl, U. C. Täuber·Jun 7, 1996SaveLearn
Analytic Bethe Ansatz for 1-D Hubbard model and twisted coupled XY modelWe found the eigenvalues of the transfer matrices for the 1-D Hubbard model and for the coupled XY model with twisted boundary condition by using the analytic Bethe Ansatz method. Under a particular…Ruihong Yue, Tetsuo Deguchi·Jun 7, 1996SaveLearn
Effect of Disorder on Charge Density Wave and Superconducting Order in the Half-Filled Attractive Hubbard ModelThe half-filled attractive Hubbard model exhibits simultaneous charge density wave and superconducting order in its ground state. In this paper we explore the effect of disorder in the site energies…C. Huscroft, R. T. Scalettar·Jun 7, 1996SaveLearn
Weak Chirality in Ordered DNA PhasesRecent experiments on aligned DNA show hexatic order with no sign of macroscopic chirality. I make the analogy between smectic liquid crystals and chiral hexatics and show how the absence of…Randall D. Kamien·Jun 6, 1996SaveLearn
Comment on "A Criterion that determines foldability of proteins" by D. Klimov and D. Thirumalai (PRL,v.76, p.4070 (1996))We argue that that the folding criterion suggested by Klimov and Thirumalai is similar to the one published earlier and that their conclusion of invalidity of the ``gap criterion'' is due to…M. Karplus, E. Shakhnovich·Jun 6, 1996SaveLearn
Bose-Einstein Condensation In Disordered Exclusion Models and Relation to Traffic FlowA disordered version of the one dimensional asymmetric exclusion model where the particle hopping rates are quenched random variables is studied. The steady state is solved exactly by use of a matrix…M. R. Evans·Jun 6, 1996SaveLearn
Fragmentation versus Stability in Bimodal CoalitionsCompeting bimodal coalitions among a group of actors are discussed. First, a model from political sciences is revisited. Most of the model statements are found not to be contained in the model.…Serge Galam·Jun 6, 1996SaveLearn
Spherical P-spin glass at P∞ and the information storing by continuous spinsThe P∞ limit was considered in the spherical P-spin glass. It is possible to store information in the vacuum configuration of ferromagnetic phase. Maximal allowed level of noise was…D. B. Saakian·Jun 6, 1996SaveLearn
Aspects of the normal state phase of copper oxide planes in high Tc superconductorsWe examine various aspects of the normal state phase of CuO2 planes in the high Tc superconductors. In particular, within the context of the three band Hubbard model, we study as a…B. C. den Hertog, M. P. Das·Jun 6, 1996SaveLearn
Crossover of Level Statistics between Strong and Weak Localization in Two DimensionsWe investigate numerically the statistical properties of spectra of two-dimensional disordered systems by using the exact diagonalization and decimation method applied to the Anderson model.…I. Kh. Zharekeshev, M. Batsch, B. Kramer·Jun 5, 1996SaveLearn
Local Magnetic Moments in Nanoscale SystemsThe formation of local magnetic moments and its size effect in one- and three-dimension finite systems with magnetic impurity are investigated based on the Anderson hybridizing model in real space.…Liang-Jian Zou, X. G. Gong, Qing-Qi Zheng et al.·Jun 5, 1996SaveLearn
Hall Resistivity in Ferromagnetic Manganese-Oxide CompoundsTemperature-dependence and magnetic field-dependence of the Hall effect and the magnetic property in manganese-oxide thin films are studied. The spontaneous magnetization and the Hall resistivity are…Liang-Jian Zou·Jun 5, 1996SaveLearn
Transport and magnetic properties in ferromagnetic manganese-oxide thin filmsThe transport and magnetic properties in ferromagnetic manganese-oxide thin films are studied based on the model of the coupling between the mobile d-electrons and the core spins in Mn ions. The…Liang-Jian Zou, X. G. Gong, Qing-Qi Zheng et al.·Jun 5, 1996SaveLearn
Far-infrared absorption in parallel quantum wires with weak tunnelingWe study collective and single-particle intersubband excitations in a system of quantum wires coupled via weak tunneling. For an isolated wire with parabolic confinement, the Kohn's theorem…T. V. Shahbazyan, S. E. Ulloa·Jun 5, 1996SaveLearn
Stochastic Growth Equations and Reparametrization InvarianceIt is shown that, by imposing reparametrization invariance, one may derive a variety of stochastic equations describing the dynamics of surface growth and identify the physical processes responsible…M. Marsili, A. Maritan, F. Toigo et al.·Jun 5, 1996SaveLearn
Longitudinal Current Dissipation in Bose-glass SuperconductorsA scaling theory of vortex motion in Bose glass superconductors with currents parallel to the common direction of the magnetic field and columnar defects is presented. Above the Bose-glass transition…David R. Nelson, Leo Radzihovsky·Jun 5, 1996SaveLearn
Wigner Crystalization in the Lowest Landau Level for ν 1/5By means of exact diagonalization we study the low-energy states of seven electrons in the lowest Landau level which are confined by a cylindric external potential modelling the rest of a macroscopic…V. A. Kashurnikov, N. V. Prokof'ev, B. V. Svistunov et al.·Jun 5, 1996SaveLearn