Phase transitions of electron-hole and unbalanced electron systems in coupled quantum wells in high magnetic fieldSuperfluidity of spatially separated electrons and holes and unbalanced two-layer electron system in high magnetic field is considered. The temperature of the Kosterlitz-Thouless transition to a…Yu. E. Lozovik, O. L. Berman, V. G. Tsvetus·May 1, 1999SaveLearn
Non-universality of compact support probability distributions in random matrix theoryThe two-point resolvent is calculated in the large-n limit for the generalized fixed and bounded trace ensembles. It is shown to disagree with the one of the canonical Gaussian ensemble by a…G. Akemann, G. M. Cicuta, L. Molinari et al.·Apr 30, 1999SaveLearn
Complexation of DNA with Cationic SurfactantTransfection of an anionic polynucleotide through a negatively charged membrane is an important problem in genetic engineering. The direct association of cationic surfactant to DNA decreases the…P. S. Kuhn, Marcia C. Barbosa, Y. Levin·Apr 30, 1999SaveLearn
Radiation From a Sine-Gordon Soliton Propagating in an External PotentialThe interaction of a fast moving sine-Gordon soliton with an external periodic potential is examined. The resulting equation of motion for the collective coordinate representing the position of the…A Calogeracos·Apr 30, 1999SaveLearn
Plateau transitions in fractional quantum Hall liquidsEffects of backward scattering between fractional quantum Hall (FQH) edge modes are studied. Based on the edge-state picture for hierarchical FQH liquids, we discuss the possibility of the…Ken-Ichiro Imura·Apr 29, 1999SaveLearn
Reservoir Layers In High Tc Mercury CupratesWe put forward the hypothesis that cations with 6s electrons (Hg,Tl,Pb,Bi) in the charge reservoir layers of high Tc cuprate superconductors actively participate in the pairing interaction as…T. H. Geballe, Boris Y. Mayzhes, P. H. Dickinson·Apr 29, 1999SaveLearn
Prewetting transitions of Ar and Ne on alkali metal surfacesWe have studied by means of Density-Functional calculations the wetting properties of Ar and Ne adsorbed on a plane whose adsorption properties simulate the Li and Na surfaces. We use reliable…Francesco Ancilotto, Flavio Toigo·Apr 29, 1999SaveLearn
Two-scale competition in phase separation with shearThe behavior of a phase separating binary mixture in uniform shear flow is investigated by numerical simulations and in a renormalization group (RG) approach. Results show the simultaneous existence…F. Corberi, G. Gonnella, A. Lamura·Apr 29, 1999SaveLearn
Phase-ordering dynamics of binary mixtures with field-dependent mobility in shear flowThe effect of shear flow on the phase-ordering dynamics of a binary mixture with field-dependent mobility is investigated. The problem is addressed in the context of the time-dependent…G. Gonnella, A. Lamura, D. Suppa·Apr 29, 1999SaveLearn
Solitons in Carbon NanotubesThe symmetries of spontaneous lattice distortions in carbon nanotubes are investigated. When the degeneracy of the ground states remains discrete, there are solitons or domain walls connecting the…Claudio Chamon·Apr 29, 1999SaveLearn
Collective oscillations of a classical gas confined in harmonic trapsStarting from the Boltzmann equation we calculate the frequency and the damping of the monopole and quadrupole oscillations of a classical gas confined in an harmonic potential. The collisional term…D. Guery-Odelin, F. Zambelli, J. Dalibard et al.·Apr 28, 1999SaveLearn
Excitation of a Dipole Topological Mode in a Strongly Coupled Two-Component Bose-Einstein CondensateTwo internal hyperfine states of a Bose-Einstein condensate in a dilute magnetically trapped gas of 87Rb atoms are strongly coupled by an external field that drives Rabi oscillations between…J. Williams, R. Walser, J. Cooper et al.·Apr 27, 1999SaveLearn
Structure factor of thin films near continuous phase transitionsThe two-point correlation function in thin films is studied near the critical point of the corresponding bulk system. Based on fieldtheoretic renormalization group theory the dependences of this…R. Klimpel, S. Dietrich·Apr 26, 1999SaveLearn
Modelling of spatio-temporal patterns in bacterial coloniesA diffusion-reaction model for the growth of bacterial colonies is presented. The often observed cooperative behavior developed by bacteria which increases their motility in adverse growth conditions…A. M. Lacasta, I. R. Cantalapiedra, C. E. Auguet et al.·Apr 26, 1999SaveLearn
Universality in self-organized critical slope modelsThe dynamics of critical slope self-organized critical models is studied, using a previous mapping into a linear interface depinning model dragged at one end. The model is solved obtaining the…Alexei Vazquez, Oscar Sotolongo-Costa·Apr 26, 1999SaveLearn
Metal-insulator transition in a multilayer system with a strong magnetic fieldWe study the Anderson localization in a weakly coupled multilayer system with a strong magnetic field perpendicular to the layers. The phase diagram of 1/3 flux quanta per plaquette is obtained. The…X. R. Wang, C. Y. Wong, X. C. Xie·Apr 26, 1999SaveLearn
Binary Mixtures of Bose-Einstein Condensates: Phase dynamics and Spatial DynamicsWe investigate the relative phase coherence properties and the occurrence of demixing instabilities for two mutually interacting and time evolving Bose-Einstein condensates in traps. Our treatment…Alice Sinatra, Yvan Castin·Apr 23, 1999SaveLearn
Symmetry Analysis of Second Harmonic Generation at Surfaces of AntiferromagnetsUsing group theory we classify the nonlinear magneto-optical response at low-index surfaces of fcc antiferromagnets, such as NiO. Structures consisting of one atomic layer are discussed in detail. We…M. Trzeciecki, A. Daehn, W. Huebner·Apr 23, 1999SaveLearn
Near field and far field scattering of surface plasmon polaritons by one-dimensional surface defectsA rigorous formulation for the scattering of surface plasmon polaritons (SPP) from a one-dimensional surface defect of any shape that yields the electromagnetic field in the vacuum half-space above…J. A. Sanchez-Gil, A. A. Maradudin·Apr 23, 1999SaveLearn
Quantum FerrimagnetsWe study quantum ferrimagnets in one, two, and three dimensions by using a variety of methods and approximations. These include: (i) a treatment based on the spin coherent state path-integral…M. Abolfath, H. Hamidian, A. Langari·Apr 23, 1999SaveLearn
Lee-Yang zeros and the Ising model on the Sierpinski GasketWe study the distribution of the complex temperature zeros for the partition function of the Ising model on a Sierpinski gasket using an exact recursive relation. Although the zeros arrange on a…R. Burioni, D. Cassi, L. Donetti·Apr 22, 1999SaveLearn
Energy Landscape of a Model ProteinThe potential energy surface of an off-lattice model protein is characterized in detail by constructing a disconnectivity graph and by examining the organisation of pathways on the surface. The…Mark A. Miller, David J. Wales·Apr 21, 1999SaveLearn
Interchain interactions and magnetic properties of Li2CuO2An effective Hamiltonian is constructed for an insulating cuprate with edge-sharing chains Li2CuO2.The Hamiltonian contains the nearest and next-nearest neighboring intrachain and zigzag-type…Y. Mizuno, T. Tohyama, S. Maekawa·Apr 20, 1999SaveLearn
Ground state wavefunction of the quantum Frenkel-Kontorova modelThe wavefunction of an incommensurate ground state for a one-dimensional discrete sine-Gordon model -- the Frenkel-Kontorova (FK) model -- at zero temperature is calculated by the quantum Monte Carlo…Bambi Hu, Baowen Li·Apr 20, 1999SaveLearn
Comment on `Universal relation between the Kolmogorov-Sinai entropy and the thermodynamic entropy in simple liquids'The intriguing relations between Kolmogorov-Sinai entropy and self diffusion coefficients and the excess (thermodynamic) entropy found by Dzugutov and collaborators do not appear to hold for hard…E. G. D. Cohen, L. Rondoni·Apr 19, 1999SaveLearn