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Condensed Matter papers — page 60

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Strain induced stabilization of stepped Si and Ge surfaces near (001)
We report on calculations of the formation energies of several [100] and [110] oriented step structures on biaxially stressed Si and Ge (001) surfaces. It is shown that a novel rebonded [100]…
V. B. Shenoy, C. V. Ciobanu, L. B. FreundMay 9, 2002
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Global culture: A noise induced transition in finite systems
We analyze the effect of cultural drift, modeled as noise, in Axelrod's model for the dissemination of culture. The disordered multicultural configurations are found to be metastable. This…
Konstantin Klemm, Victor M. Eguiluz, Raul Toral et al.May 9, 2002
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Proposal for all-electrical measurement of T1 in semiconductors
In an inhomogeneously doped magnetic semiconductor spin relaxation time T1 can be determined by all-electrical measurements. Nonequilibrium spin injected in a magnetic p-n junction gives rise to the…
Igor Zutic, Jaroslav Fabian, S. Das SarmaMay 9, 2002
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Black hole and baby universe in a thin film of 3He-A
Condensed matter black hole analogues may provide guidance in grappling with difficult questions about the role of short distance physics in the Hawking effect. These questions bear on the very…
Ted Jacobson, Tatsuhiko KoikeMay 8, 2002
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On amplitude oscillation of vibrations of strongly anisotropic high-temperature superconductors of BiPbSrCaCuO system
Effect of oscillations of the vibration amplitude of cylindrical sample suspended by a thin elastic thread and vibrating in a transverse magnetic field and containing 2D quasi-two-dimensional…
J. G. Chigvinadze, A. A. Iashvili, T. V. MachaidzeMay 8, 2002
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Slater-Pauling Behavior of the Half-Ferromagnetic Full-Heusler Alloys
Using the full-potential screened Korringa-Kohn-Rostoker method we study the full-Heusler alloys based on Co, Fe, Rh and Ru. We show that many of these compounds show a half-metallic behavior,…
I. Galanakis, P. H. Dederichs, N. PapanikolaouMay 7, 2002
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Disordered Systems and the Functional Renormalization Group: A Pedagogical Introduction
In this article, we review basic facts about disordered systems, especially the existence of many metastable states and and the resulting failure of dimensional reduction. Besides techniques based on…
Kay Joerg WieseMay 7, 2002
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Stress response function of a two-dimensional ordered packing of frictional beads
We study the stress profile of an ordered two-dimensional packing of beads in response to the application of a vertical overload localized at its top surface. Disorder is introduced through the…
Laurent Breton, Philippe Claudin, Éric Clément et al.May 6, 2002
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2-loop Functional Renormalization Group Theory of the Depinning Transition
We construct the field theory which describes the universal properties of the quasi-static isotropic depinning transition for interfaces and elastic periodic systems at zero temperature, taking…
Pierre Le Doussal, Kay Joerg Wiese, Pascal ChauveMay 6, 2002
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Gd disilicide nanowires attached to Si(111) steps
Self-assembled electronic devices, such as quantum dots or switchable molecules, need self-assembled nanowires as connections. We explore the growth of conducting Gd disilicide nanowires at step…
J. L. McChesney, A. Kirakosian, R. Bennewitza et al.May 2, 2002
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Signatures of polaronic excitations in quasi-one-dimensional LaTiO3.41
The optical properties of quasi-one-dimensional metallic LaTiO3.41 are studied for the polarization along the a and b axes. With decreasing temperature modes appear along both directions…
C. A. Kuntscher, M. Dressel, F. Lichtenberg et al.May 2, 2002
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The nucleation, growth and stabilization of vortex lattices
We give a simple unified theory of vortex nucleation and vortex lattice formation which is valid from the initiation process up to the final stabilization of the lattice. We treat the growth of…
A. A. Penckwitt, R. J. Ballagh, C. W. GardinerMay 2, 2002
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MIKA: a multigrid-based program package for electronic structure calculations
A general real-space multigrid algorithm MIKA (Multigrid Instead of the K-spAce) for the self-consistent solution of the Kohn-Sham equations appearing in the state-of-the-art electronic-structure…
T. Torsti, M. Heiskanen, M. J. Puska et al.May 2, 2002
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Exchange-driven Magnetic Excitation and Integrated Magnetoelectronics
Theory and recent experiments concerning exchange-driven magnetic excitation (EDME) are reviewed. This phenomenon employs the exchange field produced by a narrowly distributed spin-polarized electron…
J. C. SlonczewskiMay 2, 2002
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Current and vortex statistics in microwave billiards
Using the one-to-one correspondence between the Poynting vector in a microwave billiard and the probability current density in the corresponding quantum system probability densities and currents were…
Michael Barth, Hans-Juergen StoeckmannMay 2, 2002
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Conductance oscillations in metallic nanocontacts
We examine the conductance properties of a chain of Na atoms between two metallic leads in the limit of low bias. Resonant states corresponding to the conductance channel and the local charge…
P. Havu, T. Torsti, M. J. Puska et al.May 2, 2002
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Holographic analysis of diffraction structure factors
We combine the theory of inside-source/inside-detector x-ray fluorescence holography and Kossel lines/x ray standing waves in kinematic approximation to directly obtain the phases of the diffraction…
S. Marchesini, N. Mannella, C. S. Fadley et al.May 2, 2002
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Electrophoretic separation of proteins via complexation with a polyelectrolyte
We suggest to augment standard isoelectronic focusing for separation of proteins in a gradient of pH by a similar focusing in the presence of a strongly charged polyelectrolyte (PE). Proteins which…
E. M. Baskin, B. I. Shklovskii, G. V. ZilbersteinMay 1, 2002
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Fermi Surfaces of Surface States on Si(111) + Ag, Au
Metallic surface states on semiconducting substrates provide an opportunity to study low-dimensional electrons decoupled from the bulk. Angle resolved photoemission is used to determine the Fermi…
J. N. Crain, K. N. Altmann, Ch. Bromberger et al.May 1, 2002
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Generalized Wigner Function Formulation for Quantum Systems with Open Boundaries
A rigorous microscopic theory for the description of quantum-transport phenomena in systems with open boundaries is proposed. We shall show that the application of the conventional Wigner-function…
Remo Proietti Zaccaria, Fausto RossiApr 30, 2002
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Dynamics of dilute disordered models: a solvable case
We study the dynamics of a dilute spherical model with two body interactions and random exchanges. We analyze the Langevin equations and we introduce a functional variational method to study generic…
Guilhem Semerjian, Leticia F. CugliandoloApr 29, 2002
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Dynamic transitions and resonances in Josephson-junction arrays under oscillating magnetic fields
We investigate dynamic transitions and stochastic resonance phenomena in two-dimensional fully frustrated Josephson-junction arrays driven by staggered oscillating magnetic fields. As the temperature…
Gun Sang Jeon, Hyun Jin Kim, M. Y. Choi et al.Apr 29, 2002
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A Percolative Model of Soft Breakdown in Ultrathin Oxides
The degradation of ultrathin oxide layers in the presence of a stress voltage is modeled in terms of two antagonist percolation processes taking place in a random resistor network. The resistance and…
C. Pennetta, L. Reggiani, Gy. TrefanApr 27, 2002
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Amplitude equations for systems with long-range interactions
We derive amplitude equations for interface dynamics in pattern forming systems with long-range interactions. The basic condition for the applicability of the method developed here is that the bulk…
Klaus Kassner, Chaouqi MisbahApr 26, 2002
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Spin polarized parametric pumping
We have developed a general theory for a parametric pump consisting of a nonmagnetic system with two ferromagnetic leads whose magnetic moments orient at an angle θ with respect to each other. In…
Wu Junling, Baigeng Wang, Jian WangApr 26, 2002
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