Two-dimensional XY spin/gauge glasses on periodic and quasiperiodic latticesVia Monte Carlo studies of the frustrated XY or classical planar model we demonstrate the possibility of a finite (nonzero) temperature spin/gauge glass phase in two dimensions. Examples of both…R. W. Reid, S. K. Bose, B. Mitrovic·Aug 21, 1996SaveLearn
Current-voltage scaling of a Josephson-junction array at irrational frustrationNumerical simulations of the current-voltage characteristics of an ordered two-dimensional Josephson junction array at an irrational flux quantum per plaquette are presented. The results are…Enzo Granato·Aug 21, 1996SaveLearn
Landscape Paradigms in Physics and Biology: Introduction and OverviewA brief introductory overview in general terms is given of concepts, issues and applications of the paradigm of rugged landscapes in the contexts of physics and biology.David Sherrington·Aug 21, 1996SaveLearn
Spin and Charge Texture around In-Plane Charge Centers in the CuO2 planesRecent experiments on La2Cu1-xLixO4 show that although the doped holes remain localized near the substitutional Li impurities, magnetic order is rapidly suppressed. An examination of the spin…Stephan Haas, Fu-Chun Zhang, Frederic Mila et al.·Aug 21, 1996SaveLearn
Effect of double exchange and diagonal disorder on the magnetic and transport properties of La1-xSrxMnO3We use a model previously formulated based on the double exchange mechanism and diagonal disorder to calculate magnetization and conductivity for La1-xSrxMnO3 type crystals as a function of…R. Allub, B. Alascio·Aug 21, 1996SaveLearn
The effect of magnetic dipolar interactions on the interchain spin wave dispersion in CsNiF3Inelastic neutron scattering measurements were performed on the ferromagnetic chain system CsNiF3 in the collinear antiferromagnetic ordered state below TN = 2.67K. The measured spin wave…M. Baehr, M. Winkelmann, P. Vorderwisch et al.·Aug 21, 1996SaveLearn
Exact dynamical response of an N-electron quantum dot subject to a time-dependent potentialWe calculate analytically the exact dynamical response of a droplet of N interacting electrons in a quantum dot with an arbitrarily time-dependent parabolic confinement potential ω(t) and a…Simon C. Benjamin, Neil F. Johnson·Aug 20, 1996SaveLearn
Anisotropic multiple scattering in diffusive mediaThe multiple scattering of scalar waves in diffusive media is investigated by means of the radiative transfer equation. This approach, which does not rely on the diffusion approximation, becomes…E. Amic, J. M. Luck, Th. M. Nieuwenhuizen·Aug 20, 1996SaveLearn
Hall effect and geometric phases in Josephson junction arraysSince effectively the local contact vortex velocity dependent part of the Magnus force in a Josephson junction array is zero in the classical limit, we predict zero classical Hall effect. In the…P. Ao, Y. Tan, X. -M. Zhu·Aug 20, 1996SaveLearn
Derivation of the transverse force on a moving vortex in a superfluidWe describe an exact derivation of the total nondissipative transverse force acting on a quantized vortex moving in a uniform background. The derivation is valid for neutral boson or fermion…D. J. Thouless, P. Ao, Q. Niu·Aug 20, 1996SaveLearn
Random Scattering Matrices and the Circuit Theory of Andreev ConductancesThe conductance of a normal-metal mesoscopic system in proximity to superconducting electrode(s) is calculated. The normal-metal part may have a general geometry, and is described as a…Nathan Argaman·Aug 20, 1996SaveLearn
On weak vs. strong universality in the two-dimensional random-bond Ising ferromagnetWe address the issue of universality in two-dimensional disordered Ising systems, by considering long, finite-width strips of ferromagnetic Ising spins with randomly distributed couplings. We…F. D. A. Aarão Reis, S. L. A. de Queiroz, Raimundo R. dos Santos·Aug 20, 1996SaveLearn
Resonant tunneling through ultrasmall quantum dots: zero-bias anomalies, magnetic field dependence, and boson-assisted transportWe study resonant tunneling through a single-level quantum dot in the presence of strong Coulomb repulsion beyond the perturbative regime. The level is either spin-degenerate or can be split by a…Jürgen König, Jörg Schmid, Herbert Schoeller et al.·Aug 20, 1996SaveLearn
The Dynamics of a Meandering RiverWe present a statistical model of a meandering river on an alluvial plane which is motivated by the physical non-linear dynamics of the river channel migration and by describing heterogeneity of the…T. B. Liverpool, S. F. Edwards·Aug 20, 1996SaveLearn
Dielectric resonances of lattice animals and other fractal structuresElectrical and optical properties of binary inhomogeneous media are currently modelled by a random network of metallic bonds (conductance σ0, concentration p) and dielectric bonds (conductance…J. P. Clerc, G. Giraud, J. M. Luck et al.·Aug 20, 1996SaveLearn
Quasi-particle spectra around a single vortex in a d-wave superconductorUsing the Bogoliubov-de Gennes equation, we study quasi-particle spectra around a single vortex in a d-wave superconductor, where a magnetic field is parallel to the c-axis. In the temperature region…Y. Morita, M. Kohmoto, K. Maki·Aug 20, 1996SaveLearn
Boundary effects on the scaling of the superfluid densityWe study numerically the influence of the substrate (boundary conditions) on the finite--size scaling properties of the superfluid density ρs in superfluid films of thickness H within the XY…N. Schultka, E. Manousakis·Aug 20, 1996SaveLearn
Mutual Exclusion Statistics Between Quasiparticles in the Fractional Quantum Hall EffectIn this paper we propose a new assignment for mutual exclusion statistics between quasielectrons and quasiholes in the fractional quantum Hall effect. In addition to providing numerical evidence for…Wu-Pei Su, Yong-Shi Wu, Jian Yang·Aug 19, 1996SaveLearn
Inertial Mass and Viscosity of Tilted Vortex Lines in Layered SuperconductorsThe dynamics of tilted vortex lines in Josephson-coupled layered superconductors is considered within the time-dependent Ginzburg-Landau theory. The frequency and angular dependences of the…A. S. Mel'nikov·Aug 19, 1996SaveLearn
Elastic scattering and absorption of surface acoustic waves by a quantum dotWe study theoretically the piezoelectric interaction of a surface acoustic wave (SAW) with a two-dimensional electron gas confined to an isolated quantum dot. The electron motion in the dot is…Andreas Knaebchen, Yehoshua Levinson, Ora Entin-Wohlman·Aug 18, 1996SaveLearn
Quantum Hall effect in single wide quantum wellsWe study the quantum Hall states in the lowest Landau level for a single wide quantum well. Due to a separation of charges to opposite sides of the well, a single wide well can be modelled as an…M. Abolfath, L. Belkhir, N. Nafari·Aug 17, 1996SaveLearn
Electronic Spectra of Porous Silicon near Fermi LevelElectronic spectra of porous Si have been investigated in the region <4 eV below the Fermi level with specimens subjected to in situ oxygenation and thermal treatments. The significance of DOS to…A. M. Aprelev, A. A. Lisachenko, R. Laiho et al.·Aug 17, 1996SaveLearn
Metastable Voltage States of Coupled Josephson JunctionsWe investigate a chain of capacitively coupled Josephson junctions in the regime where the charging energy dominates over the Josephson coupling, exploiting the analogy between this system and a…Yaroslav M. Blanter, Gerd Schön, Andrei D. Zaikin·Aug 16, 1996SaveLearn
Brightness of a phase-conjugating mirror behind a random mediumA random-matrix theory is presented for the reflection of light by a disordered medium backed by a phase-conjugating mirror. Two regimes are distinguished, depending on the relative magnitude of the…J. C. J. Paasschens, P. W. Brouwer, C. W. J. Beenakker·Aug 16, 1996SaveLearn
Anisotropic Superconductivity of Quasi-One-Dimensional Electrons in Magnetic FieldWe study theoretically the transition temperature of a quasi-one-dimensional anisotropic superconductor in a magnetic field, which is thought to be realized in organic conductors,(TMTSF)2X. In the…Mitake Miyazaki, Yasumasa Hasegawa·Aug 16, 1996SaveLearn