Optical Bistability in Colloidal CrystalsWe present a one dimensional model for the nonlinear response of a colloidal crystal to intense light illumination along a high symmetry direction. The strong coupling between light and the colloidal…E. Lidorikis, Qiming Li, C. M. Soukoulis·Apr 9, 1997SaveLearn
The Interface Tension of the 3-Dimensional Ising Model in the Scaling RegionUsing the Monte Carlo method, we determine the free energy of the interface of the 3D Ising model in the scaling region. By integrating the interface energies over the inverse temperature β, we…M. Hasenbusch, K. Pinn·Apr 9, 1997SaveLearn
Anomalies in the antiferromagnetic phase of metamagnetsMotivated by recent experiments on the metamagnet FeBr2, anomalies of the magnetization and the specific heat in the antiferromagnetic phase of related spin models are studied systematically using…Michel Pleimling, Walter Selke·Apr 8, 1997SaveLearn
Shape-independent scaling of excitonic confinement in realistic quantum wiresThe scaling of exciton binding energy in semiconductor quantum wires is investigated theoretically through a non-variational, fully three-dimensional approach for a wide set of realistic…F. Rossi, G. Goldoni, E. Molinari·Apr 8, 1997SaveLearn
Charge ordering in doped manganese oxides: lattice dynamics and magnetic structureBased on the Hamiltonian of small polarons with the strong nearest neighbor repulsion, we have investigated the charge ordering phenomena observed in half-doped manganites R1/2A1/2MnO3. We…J. D. Lee, B. I. Min·Apr 7, 1997SaveLearn
Polaron transport and lattice dynamics in colossal magnetoresistance manganitesBased on the model combining the spin double exchange and the lattice polaron, we have studied the colossal magnetoresistance phenomena observed in perovskite manganites R1-xAxMnO3. First,…J. D. Lee, B. I. Min·Apr 7, 1997SaveLearn
On Critical Velocities in Exciton SuperfluidityThe presence of exciton phonon interactions is shown to play a key role in the exciton superfluidity. We apply the Landau criterion for an exciton-phonon condensate moving uniformly at zero…I. Loutsenko, D. Roubtsov·Apr 3, 1997SaveLearn
Thermodynamics of a trapped Bose-condensed gasWe investigate the thermodynamic behaviour of a Bose gas interacting with repulsive forces and confined in a harmonic anisotropic trap. We develop the formalism of mean field theory for non uniform…S. Giorgini, L. P. Pitaevskii, S. Stringari·Apr 2, 1997SaveLearn
Effect of the vacancy interaction on the antiphase domain growth process in a two dimensional binary alloyThe influence of diffusing vacancies on the antiphase domain growth process in a binary alloy is studied by Monte Carlo simulations. The system is modelled by means of a Blume-Emery-Griffiths…Marcel Porta, Carlos Frontera, Eduard Vives et al.·Apr 2, 1997SaveLearn
Aharonov-Bohm effect in the chiral Luttinger liquidEdge states of the quantum Hall fluid provide an almost unparalled opportunity to study mesoscopic effects in a highly correlated electron system. In this paper we develop a bosonization formalism…Michael R. Geller, Daniel Los·Apr 1, 1997SaveLearn
Magnetization Jump in a Model for Flux Lattice Melting at Low Magnetic FieldsUsing a frustrated XY model on a lattice with open boundary conditions, we numerically study the magnetization change near a flux lattice melting transition at low fields. In both two and three…Seungoh Ryu, D. Stroud·Mar 29, 1997SaveLearn
Low-Temperature Features of Nano-Particle DynamicsIn view of better characterizing possible quantum effects in the dynamics of nanometric particles, we measure the effect on the relaxation of a slight heating cycle. The effect of the field amplitude…R. Sappey, E. Vincent, M. Ocio et al.·Mar 28, 1997SaveLearn
Optical Spectra in the Ferromagnetic States near the Charge OrderingThe optical conductivity is studied numerically for the ferromagnetic metallic state close to the charge ordering observed in perovskite manganites.S. Ishihara, N. Nagaosa·Mar 28, 1997SaveLearn
On the Free Energy Monte Carlo algorithmIn this paper, I investigate more closely the recently proposed Free Energy Monte Carlo algorithm that is devised in particular for calculations where conventional Monte Carlo simulations struggle…M. J. Thill·Mar 27, 1997SaveLearn
A new old algorithm, entropy sampling, and/or getting in and out of energy minimaI propose a new algorithm, a free energy Monte Carlo algorithm, for calculations where conventional Monte Carlo simulations struggle with ergodicity problems. The simplest version of the proposed…M. J. Thill·Mar 27, 1997SaveLearn
Electronic States in Diffused Quantum WellsIn the present study we calculate the energy values and the spatial distributions of the bound electronic states in some diffused quantum wells. The calculations are performed within the virtual…S. Vlaev, D. A. Contreras-Solorio·Mar 27, 1997SaveLearn
Calculating the linear response functions of non-interacting electrons by the time-dependent Schroedinger equationAn O(N) algorithm is proposed for calculating linear response functions of non-interacting electrons in arbitray potential. This algorithm is based on numerical solution of the time-dependent…Toshiaki Iitaka, Shintaro Nomura, Hideki Hirayama et al.·Mar 26, 1997SaveLearn
Reply to the comment by C.Camacho on PRL, v.77, p.5433In this brief reply we point out to some misconceptions in C.Camacho's comment (cond-mat/9701210).A. Gutin, V. Abkevich, E. Shakhnovich·Mar 26, 1997SaveLearn
Calculation of Densities of States and Spectral Functions by Chebyshev Recursion and Maximum EntropyWe present an efficient algorithm for calculating spectral properties of large sparse Hamiltonian matrices such as densities of states and spectral functions. The combination of Chebyshev recursion…R. N. Silver, H. Roder·Mar 26, 1997SaveLearn
Pairing and Phase Coherence in High Temperature SuperconductorsMobile holes in an antiferromagnetic insulator form a slowly fluctuating array of quasi one-dimensional metallic stripes, which induce a spin gap or pseudogap in the intervening Mott-insulating…V. J. Emery, S. A. Kivelson, O. Zachar·Mar 25, 1997SaveLearn
Effective Field Theory in Condensed Matter PhysicsSome personal reminiscences are followed by a brief illustration of how effective field theories are used in condensed matter physics. Examples include Landau's Fermi liquid, sigma models with…R. Shankar·Mar 24, 1997SaveLearn
Exact, Complete, and Universal Continuous-Time Worldline Monte Carlo Approach to the Statistics of Discrete Quantum SystemsWe show how the worldline quantum Monte Carlo procedure, which usually relies on an artificial time discretization, can be formulated directly in continuous time, rendering the scheme exact. For an…N. V. Prokof'ev, B. V. Svistunov, I. S. Tupitsyn·Mar 24, 1997SaveLearn
Equilibrium and nonequilibrium applications of lattice-gas models in electrochemistryWe discuss applications of statistical-mechanical lattice-gas models to study static and dynamic aspects of electrochemical adsorption. The strategy developed to describe specific systems includes…Per Arne Rikvold, Gregory Brown, M. A. Novotny et al.·Mar 24, 1997SaveLearn
A theoretical investigation of the specific heat of superlattices in a magnetic fieldWe analyze the specific heat variations as a function of an external magnetic field of a simple model of superlattice that includes (i) in--plane ferromagnetic exchange, (ii) interplane ferromagnetic…R. Mélin, F. Fominaya·Mar 24, 1997SaveLearn
Non-destructive optical measurement of relative phase between two Bose condensatesWe study the interaction of light with two Bose condensates as an open quantum system. The two overlapping condensates occupy two different Zeeman sublevels and two driving light beams induce a…Janne Ruostekoski, Dan F. Walls·Mar 21, 1997SaveLearn