Atomic-scale perspective on the origin of attractive step interactions on Si(113)Recent experiments have shown that steps on Si(113) surfaces self-organize into bunches due to a competition between long-range repulsive and short-range attractive interactions. Using empirical and…C. V. Ciobanu, D. T. Tambe, V. B. Shenoy et al.·Apr 24, 2003SaveLearn
Properties of a Dilute Bose Gas near a Feshbach ResonanceIn this paper, properties of a homogeneous Bose gas with a Feshbach resonance are studied in the dilute region at zero temperature. The stationary state contains condensations of atoms and molecules.…Lan Yin, Zhen-Hua Ning·Apr 24, 2003SaveLearn
Modelling the propagation of an ultrasonic ray through a heterogeneous mediumThe estimation of mechanical properties of concrete is one of the most important applications of the ultrasonic method. This technique often involves the measuring of the ultrasonic pulse propagation…Carlos R. Fadragas, Manuel Rodriguez, Rolando Bonal·Apr 24, 2003SaveLearn
Variational Approach to the Dynamics of Bose-Einstein Condensates.I --Variational Ansatz and Quantum Dynamics--Variational method is applied to describe Bose-Einstein condensates (BEC) interacting via a pseudo-potential, taking into account quantum fluctuations around the mean field by the Gaussian…Y. Tsue, D. Vautherin, T. Matsui·Apr 24, 2003SaveLearn
Photocurrent in conjugated polymersNonlinear photocurrent carriers in conjugated polymers, such as polarons, bipolarons and solitons, are considered at low photon energies where a tunnelling process is necessary. We show that polarons…Baruch Horovitz, Ehoud Pazy·Apr 23, 2003SaveLearn
Comment on: "Two-phase behaviour of financial markets"In a recent article [Nature 421, 130 (2003)], Plerou, Gopikrishnan and Stanley report some evidence for an intriguing two-phase behavior of financial markets when studying the distribution of volume…M. Potters, J-P Bouchaud·Apr 23, 2003SaveLearn
Exact multilocal renormalization on the effective action : application to the random sine Gordon model statics and non-equilibrium dynamicsWe extend the exact multilocal renormalization group (RG) method to study the flow of the effective action functional. This important physical quantity satisfies an exact RG equation which is then…Gregory Schehr, Pierre Le Doussal·Apr 22, 2003SaveLearn
Spin-Voltaic Effect and its ImplicationsIn an inhomogeneously doped magnetic semiconductor, an interplay between an equilibrium magnetization and injected nonequilibrium spin leads to the spin-voltaic effect--a spin analogue of the…Igor Zutic, Jaroslav Fabian·Apr 22, 2003SaveLearn
Transport and structural study of pressure-induced magnetic states in Nd0.55Sr0.45MnO3 and Nd0.5Sr0.5MnO3Pressure effects on the electron transport and structure of Nd1-xSrxMnO3 (x = 0.45, 0.5) were investigated in the range from ambient to ~6 GPa. In Nd0.55Sr0.45MnO3, the low-temperature ferromagnetic…Congwu Cui, Trevor A. Tyson, Zhiqiang Chen et al.·Apr 21, 2003SaveLearn
Spin Nomenclature for Semiconductors and Magnetic MetalsThe different conventions used in the semiconductor and magnetic metals communities can cause confusion in the context of spin polarization and transport in simple heterostructures. In…B. T. Jonker, A. T. Hanbicki, D. T. Pierce et al.·Apr 21, 2003SaveLearn
Generating functionals, consistency, and uniqueness in the integral equation theory of liquidsWe discuss and illustrate through numerical examples the relations between generating functionals, thermodynamic consistency (in particular the virial-free energy one), and uniqueness of the…R. Fantoni, G. Pastore·Apr 20, 2003SaveLearn
Giant Helium Dimers Produced by Photoassociation of Ultracold Metastable AtomsWe produce giant helium dimers by photoassociation of metastable helium atoms in a magnetically trapped, ultracold cloud. The photoassociation laser is detuned red of the atomic 23S1 - 23P0 …J. Leonard, M. Walhout, A. P. Mosk et al.·Apr 19, 2003SaveLearn
Dynamic heterogeneities in the out-of-equilibrium dynamics of simple spherical spin modelsThe response of spherical two-spin interaction models, the spherical ferromagnet (s-FM) and the spherical Sherrington-Kirkpatrick (s-SK) model, is calculated for the protocol of the so-called…Gregor Diezemann·Apr 17, 2003SaveLearn
Noncommutative deformation and essence of a postulate of isotropy IliusinFor construction of the general theory it is necessary, first of all, to refuse from traditional performance of the elastic theory of field, within the framework of which the static processes with…V. K. Trinh·Apr 17, 2003SaveLearn
Photoinduced Magnetization in a Thin Fe-CN-Co FilmThe magnetization of a thin Fe-Co cyanide film has been investigated from 5 K to 300 K and in fields up to 500 G. Upon illumination with visible light, the magnetization of the film rapidly…J. -H. Park, Y. D. Huh, E. Čižmár et al.·Apr 17, 2003SaveLearn
Wigner lattice of ripplopolarons in a multielectron bubble in heliumThe properties of ripplonic polarons in a multielectron bubble in liquid helium are investigated on the basis of a path-integral variational method. We find that the two-dimensional electron gas can…J. Tempere, S. N. Klimin, I. F. Silvera et al.·Apr 17, 2003SaveLearn
Random matrix theory and symmetric spacesIn this review we discuss the relationship between random matrix theories and symmetric spaces. We show that the integration manifolds of random matrix theories, the eigenvalue distribution, and the…M. Caselle, U. Magnea·Apr 16, 2003SaveLearn
Observation of Magnetic Flux Generated Spontaneously During a Rapid Quench of Superconducting FilmsWe report observations of spontaneous formation of magnetic flux lines during a rapid quench of YBa2Cu3O7-δ films through Tc. This effect is predicted according to the…A. Maniv, E. Polturak, G. Koren·Apr 16, 2003SaveLearn
A Two-Atom Picture of Coherent Atom-Molecule Quantum BeatsA simple two-atom model is shown to describe a Bose-Einstein condensate of alkali atoms subjected to external magnetic field ramps near a Feshbach resonance. The implications uncovered for two atoms…Bogdan Borca, D. Blume, Chris H. Greene·Apr 15, 2003SaveLearn
A Toy Model for Cooperative Phenomena in Molecular Biology and the Utilization of Biochemical Applications of PNS in Genetic ApplicationsQualitative attributes of the region between order and disorder are examined to explore models of genetic and protein networks. Results show how the connectivity of vertices and the strength of their…S. Bumble, F. Friedler, L. T. Fan·Apr 15, 2003SaveLearn
There is life in the old horse yet or what else we can learn studying spin-1/2 XY chainsWe review some recent results on statistical mechanics of the one-dimensional spin-1/2 XY systems paying special attention to the dynamic and thermodynamic properties of the models with…Oleg Derzhko·Apr 15, 2003SaveLearn
Realistic Semiconductor Heterostructures design using Inverse ScatteringWe discuss the construction of optimized electronic filters using inverse scattering methods. We study a wide range of densities and temperatures, room temperature included. Discretization methods of…Luca Perotti, Daniel Bessis·Apr 15, 2003SaveLearn
Correlation matrix for quartet codon usageIt has been argued that the sum of usage probabilities for codons, belonging to quartets, that have as third nucleotide C or A, is independent of the biological species for vertebrates. The…L. Frappat, A. Sciarrino, P. Sorba·Apr 15, 2003SaveLearn
Diffraction in the Semiclassical Approximation to Feynman's Path Integral Representation of the Green FunctionWe derive the semiclassical approximation to Feynman's path integral representation of the energy Green function of a massless particle in the shadow region of an ideal obstacle in a medium. The…Martin Schaden, Larry Spruch·Apr 14, 2003SaveLearn
Deformation of environment having string structure in view of the topological characteristicsIn this paper the new model of plastic deformation is constructed. For classification of plastic statuses the theory of knot is used.Trinh van Khoa·Apr 13, 2003SaveLearn