Supershells in Metal Clusters: Self-Consistent Calculations and their Semiclassical InterpretationTo understand the electronic shell- and supershell-structure in large metal clusters we have performed self-consistent calculations in the homogeneous, spherical jellium model for a variety of…Erik Koch·Jun 5, 1996SaveLearn
Multiple-Scattering Theory of X-Ray Magnetic Circular Dichroism: Implementation and Results for Iron K-edgeAn implementation of the multiple-scattering approach to x-ray magnetic circular dichroism (XMCD) in K-edge x-ray absorption spectroscopy is presented. The convergence problems due to the cluster…Ch. Brouder, M. Alouani, K. H. Bennemann·Jun 5, 1996SaveLearn
Two-dimensional electron gas in uniform magnetic and electric fieldsThe thermodynamic potential of an ideal nonrelativistic gas of two-dimensional electrons in crossed uniform magnetic and electric fields is constructed. For low temperatures and very weak electric…Choon-Lin Ho, V. R. Khalilov, Chi Yang·Jun 5, 1996SaveLearn
Fermion-boson transmutation and comparison of statistical ensembles in one dimensionThe theoretical description of interacting fermions in one spatial dimension is simplified by the fact that the low energy excitations can be described in terms of bosonic degrees of freedom. This…K. Schoenhammer, V. Meden·Jun 5, 1996SaveLearn
Finite-size scaling for near-critical continuum fluids at constant pressureWe consider the application of finite-size scaling methods to isothermal-isobaric (constant-NpT) simulations of pure continuum fluids. A finite-size scaling ansatz is made for the dependence of the…N. B. Wilding, K. Binder·Jun 5, 1996SaveLearn
A Frenkel-Kontorova Model with Two Spring Constants: New Phases and Phase TransitionsA discrete Frenkel-Kontorova model with two alternate spring constants k1 and k2 is studied. It is found that this model has many surprising behaviours. The continuum version of this model…Bambi Hu, Jian Zhou·Jun 4, 1996SaveLearn
On the Bilayer Coupling in the Yttrium-Barium Family of High Temperature SuperconductorsWe derive the expressions needed to interpret experiments relating to interplane magnetic coupling in YBa2Cu3O6+x and related materials, and use the results to interpret measurements…A. J. Millis, H. Monien·Jun 4, 1996SaveLearn
Excited states of a static dilute spherical Bose condensate in a trapThe Bogoliubov approximation is used to study the excited states of a dilute gas of N atomic bosons trapped in an isotropic harmonic potential characterized by a frequency ω0 and an oscillator…Alexander L. Fetter·Jun 4, 1996SaveLearn
Complex-Temperature Phase Diagram of the 1D Z6 Clock Model and its Connection with Higher-Dimensional ModelsWe determine the exact complex-temperature (CT) phase diagram of the 1D Z6 clock model. This is of interest because it is the first exactly solved system with a CT phase boundary exhibiting a…Victor Matveev, Robert Shrock·Jun 4, 1996SaveLearn
Time Dependent Behavior of Granular Material in a Vibrating BoxUsing numerical and analytic methods, we study the time dependent behavior of granular material in a vibrating box. We find, by molecular dynamics simulation, that the temporal fluctuations of the…Jysoo Lee·Jun 4, 1996SaveLearn
Exact Ground States of One-Dimensional Quantum Systems: Matrix Product ApproachBy using the so-called matrix-product ground state approach, a few one-dimensional quantum systems, including a frustrated spin-1/2 Heisenberg ladder, the ferromagnetic t-J-V model at half-filling,…Gang Su·Jun 4, 1996SaveLearn
Edge Modes in the Hierarchical Fractional Quantum Hall Liquids with Coulomb InteractionEdge modes are studied for the hierarchical fractional quantum Hall liquids (FQHL) by treating the edge and bulk in a unified fashion. Within the RPA treatment of the composite boson effective theory…Takao Morinari, Naoto Nagaosa·Jun 4, 1996SaveLearn
Van der Waerden's Colouring Theorem and Classical Spin SystemsWe find a non-invertible matrix representation for Van der Waerden's colouring theorem for two distinct colours in a one dimensional periodic lattice. Using this,an infinite one dimensional…R. Chaudhury, D. Gangopadhyay, S. K. Paul·Jun 4, 1996SaveLearn
Non-Abelian bosonization of the frustrated antiferromagnetic spin-1/2 chainWe study the spin-1/2 chain with nearest neighbor (κ1) and next-nearest neighbor (κ2) interactions in the regime κ2 κ1, which is equivalent to two chains with a `zig-zag'…Dave Allen, David Senechal·Jun 3, 1996SaveLearn
Integer Quantum Hall Effect in Double-Layer SystemsWe consider the localization of independent electron orbitals in double-layer two-dimensional electron systems in the strong magnetic field limit. Our study is based on numerical Thouless number…Erik Sorensen, Allan MacDonald·Jun 3, 1996SaveLearn
Persistent spins in the linear diffusion approximation of phase ordering and zeros of stationary gaussian processesThe fraction r(t) of spins which have never flipped up to time t is studied within a linear diffusion approximation to phase ordering. Numerical simulations show that, even in this simple context,…Bernard Derrida, Vincent Hakim, Reuven Zeitak·Jun 3, 1996SaveLearn
Possible Spin Polarization in a One-Dimensional Electron GasIn zero magnetic field, conductance measurements of clean one-dimensional (1D) constrictions defined in GaAs/AlGaAs heterostructures show twenty-six quantized ballistic plateaux, as well as a…K. J. Thomas, J. T. Nicholls, M. Y. Simmons et al.·Jun 3, 1996SaveLearn
Cluster Analysis for Percolation on Two Dimensional Fully Frustrated SystemThe percolation of Kandel, Ben-Av and Domany clusters for 2d fully frustrated Ising model is extensively studied through numerical simulations. Critical exponents, cluster distribution and fractal…Giancarlo Franzese·Jun 3, 1996SaveLearn
Vortex-Loop Unbinding and Flux-Line Lattice Melting in SuperconductorsWe study the interplay between a novel vortex-loop unbinding in finite magnetic field at T=TV and flux-line lattice (FLL) melting at T=TM in type-II superconductors. The FLL melts due to nucleation…Anh Kiet Nguyen, A. Sudbo, R. E. Hetzel·Jun 3, 1996SaveLearn
Magnetic excitation spectrum of dimerized antiferromagnetic chainsMotivated by recent measurements on CuGeO3 the spectrum of magnetic excitations of an antiferromagnetic S=12 chain with alternating coupling strength is investigated. Wave vector…Götz S. Uhrig, H. J. Schulz·Jun 3, 1996SaveLearn
Elastic Scattering by Deterministic and Random Fractals: Self-Affinity of the Diffraction SpectrumThe diffraction spectrum of coherent waves scattered from fractal supports is calculated exactly. The fractals considered are of the class generated iteratively by successive dilations and…Daniel A. Hamburger-Lidar·Jun 2, 1996SaveLearn
Semiclassical Field Theory Approach to Quantum ChaosWe construct a field theory to describe energy averaged quantum statistical properties of systems which are chaotic in their classical limit. An expression for the generating function of general…A. V. Andreev, B. D. Simons, O. Agam et al.·Jun 2, 1996SaveLearn
Quantum Hall Transition in an Array of Quantum DotsA two-dimensional array of quantum dots in a magnetic field is considered. The electrons in the quantum dots are described as unitary random matrix ensembles. The strength of the magnetic field is…K. Ziegler·Jun 1, 1996SaveLearn
Phase diagram of the 2D 4He in the density-temperature planeThin 4He films adsorbed to weakly attractive substrates form nearly 2D layers. We describe the vortices in 2D superfluid 4He like quasiparticles. With the aid of a variational many-body…F. V. Kusmartsev, M. Saarela·Jun 1, 1996SaveLearn
Enhancement of Persistent Current on Multichannel RingWe describe a "train" effect which may exist in small metallic and semiconductor rings and might be associated with the long-standing problem of the persistent current enhancement. The…F. V. Kusmartsev·Jun 1, 1996SaveLearn