Integrable Models Associated to Classical Representations of Uq(sl(n))We describe a representation for Uq(sl(n)), when q is not a root of unity, based on the fundamental representation of sl(n). As Uq(sl(n)) has a Hopf algebra structure with a…J. Abad, M. Rios·Sep 23, 1996SaveLearn
Comment on "Quantum Monte Carlo Evidence for Superconductivity in the Three-Band Hubbard Model in Two Dimensions"In a recent Letter, Kuroki and Aoki [Phys. Rev. Lett. 76, 440 (1996)] presented quantum Monte-Carlo (QMC) results for pairing correlations in the three-band Hubbard model, which describes the…H. Endres, W. Hanke, H. G. Evertz et al.·Sep 23, 1996SaveLearn
Numerical Study of Competing Spin-Glass and Ferromagnetic OrderTwo and three dimensional random Ising models with a Gaussian distribution of couplings with variance J and non-vanishing mean value J0 are studied using the zero-temperature domain-wall…M. V. Simkin·Sep 22, 1996SaveLearn
Approach to Microcanonical Equilibrium for Nonisolated SystemsThe approach to equilibrium for systems interacting with their environment by being regularly exposed to low energy, low intensity pulses of some type of quanta is studied. Assuming a randomness…Myron Bander·Sep 21, 1996SaveLearn
Role of anisotropic impurity scattering in anisotropic superconductorsA theory of nonmagnetic impurities in an anisotropic superconductor including the effect of anisotropic (momentum-dependent) impurity scattering is given. It is shown that for a strongly anisotropic…Grzegorz Haran, A. D. S. Nagi·Sep 21, 1996SaveLearn
Point-contact spectroscopy on URu2Si2Tunnel and point contact experiments have been made in a URu2Si2 single crystal along the c-axis. The experiments were performed changing temperature and contact size in a low temperature…J. G. Rodrigo, F. Guinea, S. Vieira et al.·Sep 20, 1996SaveLearn
Dynamic renormalization-group approach to diffusive flow in heterogeneous systemsConventional methods for the simulation of diffusive systems are quite slow when applied to strongly inhomogeneous systems. We present a new hierarchical approach based on dynamic…Yuksel Gunal, P B Visscher·Sep 20, 1996SaveLearn
Soft Condensed Matter PhysicsSoft condensed matter physics is the study of materials, such as fluids, liquid crystals, polymers, colloids, and emulsions, that are ``soft" to the touch. This article will review some…T. C. Lubensky·Sep 20, 1996SaveLearn
Magneto-Resistance in the Two-Channel Anderson LatticeThe paramagnetic phase of the two channel Anderson Lattice model in the Kondo limit is investigated in infinite spatial dimensions using the non-crossing approximation. The resistivity exhibits a…Frithjof B. Anders, Mark Jarrell, D. L. Cox·Sep 20, 1996SaveLearn
High Temperature Thermopower in La2/3Ca1/3MnO3 Films: Evidence for Polaronic TransportThermoelectric power, electrical resistivity and magnetization experiments, performed in the paramagnetic phase of La2/3Ca1/3MnO3, provide evidence for polaron-dominated conduction in CMR…M. Jaime, M. B. Salamon, M. Rubinstein et al.·Sep 20, 1996SaveLearn
Phase Diagram of the Two-Channel Kondo LatticeThe phase diagram of the two-channel Kondo lattice model is examined with a Quantum Monte Carlo simulation in the limit of infinite dimensions. Commensurate (and incommensurate) antiferromagnetic and…Mark Jarrell, Hanbin Pang, D. L. Cox·Sep 20, 1996SaveLearn
Non-Fermi Liquids in the Extended Hubbard ModelI summarize recent work on non-Fermi liquids within certain generalized Anderson impurity model as well as in the large dimensionality (D) limit of the two-band extended Hubbard model. The…Qimiao Si·Sep 20, 1996SaveLearn
On the superconductivity in the system with preformed pairsWe discuss the phenomenology of the superconductivity resulting from the bose condensation of the preformed pairs coexisting with unpaired fermions. We show that this transition is more mean field…V. B. Geshkenbein, L. B. Ioffe, A. I. Larkin·Sep 20, 1996SaveLearn
Giant vesicles at the prolate-oblate transition: A macroscopic bistable systemGiant phospholipid vesicles are shown to exhibit thermally activated transitions between a prolate and an oblate shape on a time scale of several seconds. From the fluctuating contour of such a…H. -G. Doebereiner, U. Seifert·Sep 20, 1996SaveLearn
Comparison between the Torquato-Rintoul theory of the interface effect in composite media and elementary resultsWe show that the interface effect on the properties of composite media recently proposed by Torquato and Rintoul (TR) [Phys. Rev. Lett. 75, 4067 (1995)] is in fact elementary, and follows directly…Liang Fu, Lorenzo Resca·Sep 20, 1996SaveLearn
Continuum Derrida Approach to Drift and Diffusivity in Random MediaBy means of rather general arguments, based on an approach due to Derrida that makes use of samples of finite size, we analyse the effective diffusivity and drift tensors in certain types of random…D S Dean, I T Drummond, R R Horgan·Sep 20, 1996SaveLearn
Studies of h/e Aharonov-Bohm Photovoltaic Oscillations in Mesoscopic Au RingsWe have investigated a mesoscopic photovoltaic (PV) effect in micron-size Au rings in which a dc voltage Vdc is generated in response to microwave radiation. The effect is due to the lack of…R. E. Bartolo, N. Giordano, X. Huang et al.·Sep 20, 1996SaveLearn
Polaronic effects in strongly coupled electron-phonon systems: Exact diagonalization results for the 2D Holstein t-J modelGround-state and dynamical properties of the 2D Holstein t-J model are examined by means of direct Lanczos diagonalization, using a truncation method of the phononic Hilbert space. The single-hole…H. Fehske, G. Wellein, B. Bäuml et al.·Sep 20, 1996SaveLearn
Singlet and triplet doped-hole configurations in La2Cu0.5Li0.5O4The ordered alloy La2Li0.5Cu0.5O4 is found to be a band insulator in local density approximation (LDA) calculations with the unoccupied conduction band having predominantly…V. I. Anisimov, S. Yu. Ezhov, T. M. Rice·Sep 20, 1996SaveLearn
Orbital Magnetism in the Ballistic Regime: Geometrical EffectsWe present a general semiclassical theory of the orbital magnetic response of noninteracting electrons confined in two-dimensional potentials. We calculate the magnetic susceptibility of…K. Richter, D. Ullmo, R. A. Jalabert·Sep 20, 1996SaveLearn
Integrability and Disorder in Mesoscopic Systems: Application to Orbital MagnetismWe present a semiclassical theory of weak disorder effects in small structures and apply it to the magnetic response of non-interacting electrons confined in integrable geometries. We discuss the…K. Richter, D. Ullmo, R. A. Jalabert·Sep 20, 1996SaveLearn
Aharonov-Bohm-Type Oscillations of Thermopower in a Quantum Dot Ring GeometryWe investigate Aharonov-Bohm-type oscillations of the thermopower of a quantum dot embedded in a ring for the case when the interaction between electrons can be neglected. The thermopower is shown to…Ya. M. Blanter, C. Bruder, Rosario Fazio et al.·Sep 20, 1996SaveLearn
Variationnal study of ferromagnetism in the t1-t2 Hubbard chainA one-dimensional Hubbard model with nearest and (negative) next-nearest neighbour hopping is studied variationally. This allows to exclude saturated ferromagnetism for U < Uc. The variational…S. Daul, P. Pieri, M. Dzierzawa et al.·Sep 20, 1996SaveLearn
Effects of a Magnetic Field on a Modulated PhaseThe effects of a magnetic field on a modulated phase is studied. A modulated phase is found to have two critical fields H1 and H2. For a large enough magnetic field. H1 can be…Bambi Hu, Jian Zhou·Sep 20, 1996SaveLearn
Electronic structure of the valence band of the II--VI wide band gap binary/ternary alloy interfacesWe present an electronic structure calculation of the valence band for some II--VI binary/ternary alloy interfaces. We use the empirical tight-binding method and the surface Green's function…D. Olguin, R. Baquero·Sep 20, 1996SaveLearn