Fast Ground-State Reordering from Off-Diagonal Fluctuations of InteractionIt is shown that off-diagonal fluctuations of interaction lead to the breakdown of perturbation theory in the immediate vicinity of the ground-state of a fermionic system at a rate inversely…Philippe Jacquod·Feb 20, 2001SaveLearn
A Hartree-Fock Study of Charge Redistribution in a 2D Mesoscopic StructureIn this paper, we investigate the ground state of two-dimensional disordered cylinders which contain spinless, interacting electrons using the Hartree-Fock approximation. Calculations of the…A. Kambili, H. Fehrmann, C. J. Lambert et al.·Feb 20, 2001SaveLearn
Heat Capacity of Protein FoldingWe construct a Hamiltonian for a single domain protein where the contact enthalpy and the chain entropy decrease linearly with the number of native contacts. The hydration effect upon protein…Audun Bakk, Johan S. Hoye, Alex Hansen·Feb 19, 2001SaveLearn
Spin Polarized Ground State for Interacting Electrons in Two DimensionsWe study numerically the ground state magnetization for clusters of interacting electrons in two dimensions in the regime where the single particle wavefunctions are localized by disorder. It is…Giuliano Benenti, Gaetan Caldara, Dima L. Shepelyansky·Feb 19, 2001SaveLearn
A Bosonic Model of Hole PairsWe numerically investigate a bosonic representation for hole pairs on a two-leg t-J ladder where hard core bosons on a chain represent the hole pairs on the ladder. The interaction between hole pairs…Th. Siller, M. Troyer, T. M. Rice et al.·Feb 19, 2001SaveLearn
Nesting symmetries and diffusion in disordered d-wave superconductorsThe low-energy density of states (DOS) of disordered 2D d-wave superconductors is extremely sensitive to details of both the disorder model and the electronic band structure. Using diagrammatic…A. G. Yashenkin, W. A. Atkinson, I. V. Gornyi et al.·Feb 16, 2001SaveLearn
Electron transmission through molecules and molecular interfacesElectron transmission through molecules and molecular interfaces has been a subject of intensive research due to recent interest in electron transfer phenomena underlying the operation of the…Abraham Nitzan·Feb 16, 2001SaveLearn
Response to tilted magnetic fields in Bi2Sr2CaCu2O8 with columnar defects: Evidence for transverse Meissner effectThe transverse Meissner effect (TME) in the highly layered superconductor Bi2Sr2CaCu2O(8+y) with columnar defects is investigated by transport measurements. We present detailed evidence for the…V. Ta Phuoc, E. Olive, R. De Sousa et al.·Feb 16, 2001SaveLearn
Uemura Plot as a Certificate of Two-dimensional Character of Superconducting Transition for Quasi-two-dimensional HTSWith using general properties of superconducting state for 2D systems the universal temperature dependence of the penetration length is found out for quasi-2D HTS, that leads to Uemura plot and…G. Sergeeva·Feb 16, 2001SaveLearn
Tunable tunneling: An application of stationary states of Bose-Einstein condensates in traps of finite depthThe fundamental question of how Bose-Einstein condensates tunnel into a barrier is addressed. The cubic nonlinear Schrodinger equation with a finite square well potential, which models a…L. D. Carr, K. W. Mahmud, W. P. Reinhardt·Feb 16, 2001SaveLearn
Nature of bonding and electronic structure in MgB2, a boron intercalation superconductorChemical bonding and electronic structure of MgB2, a boron-based newly discovered superconductor, is studied using self-consistent band structure techniques. Analysis of the transformation of the…K. D. Belashchenko, M. van Schilfgaarde, V. P. Antropov·Feb 15, 2001SaveLearn
Quenched Disorder Effects on Deterministic Inertia RatchetsThe effect of quenched disorder on the underdamped motion of a periodically driven particle on a ratchet potential is studied. As a consequence of disorder, current reversal and chaotic diffusion may…C. M. Arizmendi, Fereydoon Family, A. L. Salas-Brito·Feb 15, 2001SaveLearn
On wave propagation in inhomogeneous systemsWe present a theory of electron, electromagnetic, and elastic wave propagation in systems consisting of non-overlapping scatterers in a host medium. The theory provides a framework for a unified…A. Modinos, N. Stefanou, I. E. Psarobas et al.·Feb 15, 2001SaveLearn
Liquid-Solid Phase Transition and the Change of the Frictional Force of the System with Two particles in a BoxLiquid-solid phase transition and the change of the frictional force of a system with two hard spheres in a two-dimensional rectangular box are discussed. Under controlling the pressure or the supply…A. Awazu·Feb 14, 2001SaveLearn
Longitudinal Solitons in Carbon NanotubesWe present the results on the soliton excitations in carbon nanotubes (CNT) using Brenner's many-body potential. Our numerical simulations demonstrate high soliton stability in (10,10) CNT. The…T. Yu. Astakhova, O. D. Gurin, M. Menon et al.·Feb 13, 2001SaveLearn
Theory of a magnetic microscope with nanometer resolutionWe propose a theory for a type of apertureless scanning near field microscopy that is intended to allow the measurement of magnetism on a nanometer length scale. A scanning probe, for example a…Peter Johansson, S. Peter Apell, D. R. Penn·Feb 13, 2001SaveLearn
Phase Diagram of a Two-Dimensional Neutral Classical Coulomb Gas from a Non-perturbative sine-Gordon ExpansionWithin the sine-Gordon formalism of a two-dimensional neutral classical Coulomb gas, a convergent expansion with non-perturbative nature is performed to calculate the thermodynamic potential and…Wen-Fa Lu, Chul Koo Kim·Feb 13, 2001SaveLearn
Field theory for generalized Shastry-Sutherland modelsWe consider the bosonic dimer representation for Generalized Shastry-Sutherland models that have the same symmetries as the original Shastry-Sutherland model and preserve the exact dimer eigenstate.…David Carpentier, Leon Balents·Feb 12, 2001SaveLearn
Discrete Breathers in Josephson LaddersWe present a study of nonlinear localized excitations called discrete breathers in a superconducting array. These localized solutions were recently observed in Josephson-junction ladder arrays by two…E. Trias, J. J. Mazo, A. Brinkman et al.·Feb 12, 2001SaveLearn
Static and Dynamic Properties of Stretched WaterWe present the results of molecular dynamics simulations of the extended simple point charge (SPC/E) model of water to investigate thethermodynamic and dynamic properties of stretched and supercooled…Paulo A. Netz, Francis W. Starr, H. Eugene Stanley et al.·Feb 12, 2001SaveLearn
The Isothermal Binodal Curves Near a Critical EndpointThermodynamics in the vicinity of a critical endpoint with nonclassical exponents α, β, γ, δ, ... is analyzed in terms of density variables (mole fractions, magnetizations, etc.). The…Young C. Kim, Michael E. Fisher, Marcia C. Barbosa·Feb 12, 2001SaveLearn
Antiferromagnetic Interlayer Coupling in Ferromagnetic Semiconductor EuS/PbS(001) SuperlatticesAntiferromagnetic coupling between ferromagnetic layers has been observed for the first time in all-semiconductor superlattice structure EuS/PbS(001), by neutron scattering and magnetization…H. Kepa, J. Kutner-Pielaszek, J. Blinowski et al.·Feb 11, 2001SaveLearn
Probing impulsive strain propagation with x-ray pulsesPump-probe time-resolved x-ray diffraction of allowed and nearly forbidden reflections in InSb is used to follow the propagation of a coherent acoustic pulse generated by ultrafast laser-excitation.…D. A. Reis, M. F. DeCamp, P. H. Bucksbaum et al.·Feb 9, 2001SaveLearn
The Merchandising Mathematician ModelA simple model of a buying-selling cycle is proposed. The model comprises two moves: a rational buying and a random selling. The notion of a profit intensity is introduced. Supply and demand curves…E. W. Piotrowski, J. Sladkowski·Feb 9, 2001SaveLearn
Theoretical study of the dynamic structure factor of superfluid 4HeWe study the dynamic structure factor S(q,ω) of superfluid 4He at zero temperature in the roton momentum region and beyond using field-theoretical Green's function techniques. We start…J. Szwabinski, M. Weyrauch·Feb 9, 2001SaveLearn