Ballistic Spin Injection from Fe(001) into ZnSe and GaAsWe consider the spin injection from Fe into ZnSe and GaAs in the ballistic limit. By means of the ab initio SKKR method we calculate the ground state properties of epitaxial Fe|ZnSe(001) and…O. Wunnicke, Ph. Mavropoulos, R. Zeller et al.·Jan 16, 2002SaveLearn
Calculations of the Local Density of States for some Simple SystemsA recently proposed convolution technique for the calculation of local density of states is described more thouroughly and new results of its application are presented. For separable systems the…A. Losev, S. Vlaev·Jan 16, 2002SaveLearn
Mechanisms for electron transport in atomic-scale one-dimensional wires: soliton and polaron effectsWe study one-electron tunneling through atomic-scale one-dimensional wires in the presence of coherent electron-phonon (e-ph) coupling. We use a full quantum model for the e-ph interaction within the…H. Ness, A. J. Fisher·Jan 16, 2002SaveLearn
Phase Fluctuations in Bose-Einstein CondensatesWe demonstrate the existence of phase fluctuations in elongated Bose-Einstein Condensates (BECs) and study the dependence of those fluctuations on the system parameters. A strong dependence on…D. Hellweg, S. Dettmer, P. Ryytty et al.·Jan 16, 2002SaveLearn
Collisionless hydrodynamics for 1D motion of inhomogeneous degenerate electron gases: equivalence of two recent descriptionsRecently I. Tokatly and O. Pankratov (''TP'', Phys. Rev. B 60, 15550 (1999)) used velocity moments of a semiclassical kinetic equation to derive a hydrodynamic description of electron…John F. Dobson, Hung M. Le·Jan 16, 2002SaveLearn
Directed force chain networks and stress response in static granular materialsA theory of stress fields in two-dimensional granular materials based on directed force chain networks is presented. A general equation for the densities of force chains in different directions is…J. E. S. Socolar, D. G. Schaeffer, P. Claudin·Jan 15, 2002SaveLearn
Axions, Quantum Mechanical Pumping, and Primeval Magnetic FieldsWe discuss the ordinary quantum Hall effect and a higher-dimensional cousin. We consider the dimensional reduction of these effects to 1+1 and 3+1 space-time dimensions, respectively. After…J. Froehlich, B. Pedrini·Jan 15, 2002SaveLearn
Interacting Growth Walk on a honeycomb latticeThe Interacting Growth Walk (IGW) is a kinetic algorithm proposed recently for generating long, compact, self avoiding walks. The growth process in IGW is tuned by the so called growth temperature…S. L. Narasimhan, P. S. R. Krishna, M. Ramanadham et al.·Jan 15, 2002SaveLearn
Temperature dependence of the spin and orbital magnetization density in Sm1-xGdx Al2 around the spin-orbital compensation pointNon-resonant ferromagnetic x-ray diffraction has been used to separate the spin and orbital contribution to the magnetization density of the proposed zero-moment ferromagnet $Sm0.982Gd0.018…J. W. Taylor, J. A. Duffy, A. M. Bebb et al.·Jan 14, 2002SaveLearn
Optical Turbulent StructuresThe problem of describing optical turbulent structures, arising in resonant media with high Fresnel numbers, is reviewed. The consideration is based on the probabilistic approach to pattern…V. I. Yukalov·Jan 14, 2002SaveLearn
About one forgotten mechanism of nonlinearity in the theory of hot electronsIt is shown that in general electron gas heating inevitably results in the change of the carrier concentration in the conduction band. It is proved, that this change, as a rule, leads to the kinetic…Yu. G. Gurevich, I. N. Volovichev·Jan 14, 2002SaveLearn
The Role of Non-Equilibrium Carriers in Formation of Thermo-E.M.F. in Bipolar SemiconductorsA new approach to thermoelectric phenomena, as a linear transport process of non-equilibrium charge carriers, is presented. The role of non-equilibrium carriers, as well as surface and bulk…Yu. G. Gurevich, G. N. Logvinov, I. N. Volovichev et al.·Jan 11, 2002SaveLearn
Statistical Theory of Associating Polymer Solutions: Interfacial PropertiesThe interfacial structure formed in thermoreversible associating polymer solutions is studied within the density functional approach based on Flory's arguments of tree-like configurations of…Aleksander V. Ermoshkin, Igor Erukhimovich, Jeff Z. Y. Chen·Jan 11, 2002SaveLearn
Stability of rotating states in a weakly-interacting Bose-Einstein condensateWe investigate the lowest state of a rotating, weakly-interacting Bose-Einstein condensate trapped in a harmonic confining potential that is driven by an infinitesimally asymmetric perturbation.…G. M. Kavoulakis·Jan 10, 2002SaveLearn
The role of point-like topological excitations at criticality: from vortices to global monopolesWe determine the detailed thermodynamic behavior of vortices in the O(2) scalar model in 2D and of global monopoles in the O(3) model in 3D. We construct new numerical techniques, based on cluster…Nuno D. Antunes, Luis M. Bettencourt, Martin Kunz·Jan 10, 2002SaveLearn
Materials with Colossal Dielectric Constant: Do They Exist?Experimental evidence is provided that colossal dielectric constants, epsilon >= 1000, sometimes reported to exist in a broad temperature range, can often be explained by Maxwell-Wagner type…P. Lunkenheimer, V. Bobnar, A. V. Pronin et al.·Jan 10, 2002SaveLearn
Mean-field model of the ferromagnetic ordering in the superconducting phase of ErNi2B2CA mean-field model explaining most of the details in the magnetic phase diagram of ErNi2B2C is presented. The low-temperature magnetic properties are found to be dominated by the appearance of…Jens Jensen·Jan 9, 2002SaveLearn
Recombination in Semiconductors: Appearance of Non-equilibrium Carriers due to Injection or Redistribution in the SampleIt is shown that the traditional approach for consideration of recombination under condition of steady-state current in the absence of external carrier generation is internally contradictory.…I. N. Volovichev, G. Espejo, Yu. G. Gurevich et al.·Jan 9, 2002SaveLearn
Selection of dune shapes and velocities. Part 2: A two-dimensional modellingWe present in this paper a simplification of the dune model proposed by Sauermann et al. which keeps the basic mechanisms but allows analytical and parametric studies. Two kinds of purely propagative…Bruno Andreotti, Philippe Claudin·Jan 8, 2002SaveLearn
Selection of dune shapes and velocities. Part 1: Dynamics of sand, wind and barchansAlmost fifty years of investigations of barchan dunes morphology and dynamics is reviewed, with emphasis on the physical understanding of these objects. The characteristics measured on the field…Bruno Andreotti, Philippe Claudin, Stéphane Douady·Jan 8, 2002SaveLearn
Quantum field theory of dilute homogeneous Bose-Fermi-mixtures at zero temperature: general formalismand beyond mean-field correctionsWe consider a dilute homogeneous mixture of bosons and spin-polarized fermions at zero temperature. We first construct the formal scheme for carrying out systematic perturbation theory in terms of…Alexander P. Albus, Simon A. Gardiner, Fabrizio Illuminati et al.·Jan 8, 2002SaveLearn
Ultracold dipolar gases - a challenge for experiments and theoryWe present a review of recent results concerning the physics of ultracold trapped dipolar gases. In particular, we discuss the Bose-Einstein condensation for dipolar Bose gases and the BCS transition…M. Baranov, L. Dobrek, K. Goral et al.·Jan 8, 2002SaveLearn
Field dependent anisotropy change in a supramolecular Mn(II)-[3x3] gridThe magnetic anisotropy of a novel Mn(II)-[3x3] grid complex was investigated by means of high-field torque magnetometry. Torque vs. field curves at low temperatures demonstrate a ground state with S…Oliver Waldmann, L. Zhao, L. K. Thompson·Jan 8, 2002SaveLearn
Effect of disorder on the conductance of a Cu atomic point contactWe present a systematic study of the effect of the disorder in copper point contacts. We show that peaks in the conductance histogram of copper point contacts shift upon addition of nickel…D. J. Bakker, Y. Noat, A. I. Yanson et al.·Jan 7, 2002SaveLearn
Correlated theory of triplet photoinduced absorption in phenylene-vinylene chainsIn this paper we present results of large-scale correlated calculations of triplet photoinduced absorption (PA) spectrum of oligomers of poly-(para)phenylenevinylene (PPV) containing up to five…Alok Shukla·Jan 7, 2002SaveLearn