Skip to content

Condensed Matter papers — page 273

cond-matBrowse archive

Bose-Einstein condensation of atomic gases in a harmonic oscillator confining potential trap
We present a model which predicts the temperature of Bose-Einstein condensation in atomic alkali gases and find excellent agreement with recent experimental observations. A system of bosons confined…
Klaus Kirsten, David J. TomsApr 4, 1996
Learn
Friedel transition in a modified XY model
Weakly coupled superconducting layers are described by the three-dimensional XY model with strong coupling in two directions and weak coupling in the third direction. For the usual Josephson-type…
M. Dzierzawa, M. Zamora, D. Baeriswyl et al.Apr 4, 1996
Learn
Friedel oscillations in Luttinger liquids
We study the density disturbance of a correlated 1D electron liquid in the presence of a scatterer or a barrier. The 2kF-periodic density profile away from the barrier (Friedel oscillation) is…
Reinhold Egger, Hermann GrabertApr 4, 1996
Learn
Quantum Coherence of Edge States in the Quantum Hall Effect -- Topological Invariants and Edge State Mixing --
Edge states in the integral quantum Hall effect on a lattice are reviewed from a topological point of view. For a system with edges which is realized inevitably in an experimental situation, the Hall…
Yasuhiro HatsugaiApr 4, 1996
Learn
Charge Sensitivity of Superconducting Single-Electron Transistor
It is shown that the noise-limited charge sensitivity of a single-electron transistor using superconductors (of either SISIS or NISIN type) operating near the threshold of quasiparticle…
Alexander N. KorotkovApr 3, 1996
Learn
Symmetry and Scaling of Turbulent Mixing
The stationary condition (Hopf equation) for the (n+1) point correlation function of a passive scalar advected by turbulent flow is argued to have an approximate SL(n, R) symmetry which provides…
Boris I Shraiman, Eric D SiggiaApr 3, 1996
Learn
Excitons of Composite Fermions
The low-energy excitations of filled Landau levels (LL's) of electrons involve promotion of a single electron from the topmost filled LL to the lowest empty LL. These are called excitons or…
R. K. Kamilla, X. G. Wu, J. K. JainApr 3, 1996
Learn
Skyrmions in the Fractional Quantum Hall Effect
It is verified that, at small Zeeman energies, the charged excitations in the vicinity of 1/3 filled Landau level are skyrmions of composite fermions, analogous to the skyrmions of electrons near…
R. K. Kamilla, X. G. Wu, J. K. JainApr 3, 1996
Learn
Beat-wave generation of plasmons in semiconductor plasmas
It is shown that in semiconductor plasmas, it is possible to generate large amplitude plasma waves by the beating of two laser beams with frequency difference close to the plasma frequency. For…
V. I. Berezhiani, S. M. MahajanApr 3, 1996
Learn
Quantum Dynamical Echoes in the Spin 'Diffusion' in Mesoscopic Systems
The evolution of local spin polarization in finite systems involves interference phenomena that give rise to quantum dynamical echoes and non-ergodic behavior. We predict the conditions to…
Horacio M. Pastawski, Patricia R. Levstein, Gonzalo UsajApr 3, 1996
Learn
Theory for the Nonlinear Ultrafast Dynamics of Small Clusters after Ionization
The ultrafast relaxation of small clusters immediately after ionization is studied. For small Hgn clusters we determine the fragmentation-time distributions induced by ionization. A dramatic…
M. E. Garcia, D. Reichardt, K. H. BennemannApr 3, 1996
Learn
Tricritical behaviour of Ising spin glasses with charge fluctuations
We show that tricritical points displaying unusal behaviour exist in phase diagrams of fermionic Ising spin glasses as the chemical potential or the filling assumes characteristic values. Exact…
B. Rosenow, R. OppermannApr 2, 1996
Learn
Vortex dynamics in disordered Josephson junction arrays: from plastic flow to flux flow
We study the dynamics of Josephson junction arrays with positional disorder and driven by an external current. We consider weak magnetic fields, corresponding to a frustration f=n+1/25 with n…
Daniel DominguezApr 2, 1996
Learn
Stability of the Bragg glass phase in a layered geometry
We study the stability of the dislocation-free Bragg glass phase in a layered geometry consisting of coupled parallel planes of d=1+1 vortex lines lying within each plane, in the presence of impurity…
D. Carpentier, P. Le Doussal, T. GiamarchiApr 2, 1996
Learn
Quantum Hall Effect and Chaotic Motion in Phase Space
We discuss the relation between the Quantum Hall behaviour of charged carriers and their chaotic motion in phase space. It is shown that the quantum Hall diagram is comparable with the stepped…
F. GhaboussiApr 2, 1996
Learn
High genus periodic gyroid surfaces of non-positive Gaussian curvature
In this paper we present the novel method for the generation of periodic embedded surfaces of nonpositive Gaussian curvature. The structures are related to the local minima of the scalar order…
W. T. Gozdz, R. HolystApr 2, 1996
Learn
Incomplete melting of the Si(100) surface from molecular-dynamics simulations using the Effective-Medium Tight-Binding model
We present molecular-dynamics simulations of the Si(100) surface in the temperature range 1100-1750K. To describe the total energy and forces we use the Effective-Medium Tight-Binding model. The…
K. Stokbro K. W. Jacobsen, J. K. Nørskov, D. M. Deaven et al.Apr 2, 1996
Learn
A mixed ultrasoft/normconserved pseudopotential scheme
A variant of the Vanderbilt ultrasoft pseudopotential scheme, where the normconservation is released for only one or a few angular channels, is presented. Within this scheme some difficulties of the…
Kurt StokbroApr 2, 1996
Learn
Vortex Dynamics in Superfluid Systems: Cyclotron Type Motion
Vortex dynamics in superfluids is investigated in the framework of the nonlinear Schrödinger equation. The natural motion of the vortex is of cyclotron type, whose frequency is found to be on the…
E. Demircan, P. Ao, Q. NiuApr 2, 1996
Learn
Josephson tunneling in high-Tc superconductors
This article describes the Josephson tunneling from time-reversal symmetry-breaking states and compares it with that from time-reversal invariant states for both twinned and untwinned crystals and…
M. B. Walker, J. Luettmer-StrathmannApr 1, 1996
Learn
Local Antiferromagnetic Correlations and dx2-y2 Pairing
The high Tc cuprate superconductors doped near half-filling have short range antiferromagnetic correlations. Here we describe an intuitive local picture of why, if pairing occurs in the presence…
D. J. Scalapino, S. A. TrugmanApr 1, 1996
Learn
Remarks on the Current-Carrying State of Hall Superfluids
I discuss in an elementary and self-contained way the nature of the current-carrying state in Hall superfluids. The explicit connection of fractional charge and rationality of the filling fraction…
Frank WilczekApr 1, 1996
Learn
Strong-coupling expansions for the anharmonic Holstein model and for the Holstein-Hubbard model
A strong-coupling expansion is applied to the anharmonic Holstein model and to the Holstein-Hubbard model through fourth order in the hopping matrix element. Mean-field theory is then employed to…
J. K. Freericks, G. D. MahanApr 1, 1996
Learn
Phase Coherence in a Random One-Dimensional System of Interacting Fermions: A Density Matrix Renormalization Group Study
Using the density matrix renormalization group algorithm, we study the model of spinless fermions with nearest-neighbor interaction on a ring in the presence of disorder. We determine the spatial…
P. Schmitteckert, U. EckernApr 1, 1996
Learn
Coulomb drag in double quantum wells with a perpendicular magnetic field
Momentum transfer due to electron-electron interaction (Coulomb drag) between two quantum wells, separated by a distance d, in the presence of a perpendicular magnetic field, is studied at low…
M. W. Wu, H. L. Cui, N. J. M. HoringApr 1, 1996
Learn
← PreviousPage 273Next →