Order-disorder criticality, wetting, and morphological phase transitions in the irreversible growth of far-from-equilibrium magnetic filmsAn exhaustive numerical investigation of the growth of magnetic films in confined (d+1)-dimensional stripped geometries (d=1,2) is carried out by means of extensive Monte Carlo simulations. Thin…Julián Candia, Ezequiel V. Albano·Sep 27, 2002SaveLearn
Unusual magnetic-field dependence of partially frustrated triangular ordering in manganese tricyanomethanideManganese tricyanomethanide, Mn[C(CN)3]2, consists of two interpenetrating three-dimensional rutile-like networks. In each network, the tridentate C(CN)3- anion gives rise to superexchange…Ralf Feyerherm, Anja Loose, Jamie L. Manson·Sep 26, 2002SaveLearn
Onset of Delocalization in Quasi-1D Waveguides with Correlated Surface DisorderWe present first analytical results on transport properties of many-mode waveguides with rough surfaces having long-range correlations. We show that propagation of waves through such waveguides…F. M. Izrailev, N. M. Makarov·Sep 26, 2002SaveLearn
Interfacial phase transitions in a far-from-equilibrium magnetic growth modelThe irreversible growth of a magnetic film with spins having two possible orientations is studied in three-dimensional confined geometries of size L× L× M, where M L is the growing…Julián Candia, Ezequiel V. Albano·Sep 26, 2002SaveLearn
Controlling two-species Mott-insulator phses in an optical lattice to form an array of dipolar moleculesWe consider the transfer of a two-species Bose-Einstein condensate into an optical lattice with a density such that that a Mott-insulator state with one atom per species per lattice site is obtained…M. G. Moore, H. R. Sadeghpour·Sep 26, 2002SaveLearn
Scale-free behavior of the Internet global performanceMeasurements and data analysis have proved very effective in the study of the Internet's physical fabric and have shown heterogeneities and statistical fluctuations extending over several orders…Roberto Percacci, Alessandro Vespignani·Sep 26, 2002SaveLearn
Magnetization orientation dependence of the quasiparticle spectrum and hysteresis in ferromagnetic metal nanoparticlesWe use a microscopic Slater-Koster tight-binding model with short-range exchange and atomic spin-orbit interactions that realistically captures generic features of ferromagnetic metal nanoparticles…A. Cehovin, C. M. Canali, A. H. MacDonald·Sep 26, 2002SaveLearn
High magnetic field-induced insulating phase in an organic conductorWe report electrical transport, skin depth, and magnetocaloric measurements in the tau-series of organic conductors at very high magnetic fields. Above 36 T these materials show a magnetic field…J. S. Brooks, D. Graf, E. S. Choi et al.·Sep 25, 2002SaveLearn
Decision making dynamics in corporate boardsMembers of boards of directors of large corporations who also serve together on an outside board, form the so called interlock graph of the board and are assumed to have a strong influence on each…Stefano Battiston, Eric Bonabeau, Gerard Weisbuch·Sep 25, 2002SaveLearn
Perturbative Linearization of Reaction-Diffusion EquationsWe develop perturbative expansions to obtain solutions for the initial-value problems of two important reaction-diffusion systems, viz., the Fisher equation and the time-dependent Ginzburg-Landau…Sanjay Puri, Kay Joerg Wiese·Sep 23, 2002SaveLearn
Shot Noise in Tunneling through a Quantum Dot ArrayThe shot noise suppression in a sample containing a layer of self-assembled InAs quantum dots has been investigated experimentally and theoretically. The observation of a non-monotonic dependence of…G. Kiesslich, A. Wacker, E. Schoell et al.·Sep 23, 2002SaveLearn
Ab initio investigation of VOSeO3, a spin gap system with coupled spin dimersMotivated by an early experimental study of VOSeO3, which suggested that it is a quasi-2D system of weakly coupled spin dimers with a small spin gap, we have investigated the electronic structure of…Roser Valenti, T. Saha-Dasgupta, F. Mila·Sep 23, 2002SaveLearn
The favoured cluster structures of model glass formersWe examine the favoured cluster structures for two new potentials, which both behave as monatomic model glass-formers in bulk. We find that the oscillations in the interatomic potential lead to…Jonathan P. K. Doye, David J. Wales, Fredrik H. M. Zetterling et al.·Sep 23, 2002SaveLearn
Colossal Dielectric Constants in Braced Lattices with DefectsThe dielectric constant of CaCu3Ti4O12 is measured with a different electrode geometry than previous measurements. Similar colossal values are obtained showing that they are "intrinsic" to…A. P. Ramirez, G. Lawes, V. Butko et al.·Sep 20, 2002SaveLearn
Polarization catastrophe in doped cuprates and metal-ammonia solutions: an analogyOn doping polar dielectrics, such as the cuprates or liquid ammonia, the long range polarization leads to the formation of bound states (polarons or solvated electrons). However, the exact role of…P. Quemerais, J. -L. Raimbault, S. Fratini·Sep 19, 2002SaveLearn
Lack of self-averaging in neutral evolution of proteinsWe simulate neutral evolution of proteins imposing conservation of the thermodynamic stability of the native state in the framework of an effective model of folding thermodynamics. This procedure…Ugo Bastolla, Markus Porto, H. Eduardo Roman et al.·Sep 19, 2002SaveLearn
Conductivity and Thickness of DNAsDebates about conductivity of DNAs have been recently renewed due to contradictory results of direct measurements by use of electrical contacts to molecules. In several works it was discovered that…A. Yu. Kasumov, D. V. Klinov·Sep 19, 2002SaveLearn
Sign of refractive index and group velocity in left-handed mediaWe argue that the widely spread opinion that the left-handed media (LHM) are characterized by a negative refractive index n- is misleading. Since n does not enter into Maxwell's equations and…A. L. Pokrovsky, A. L. Efros·Sep 18, 2002SaveLearn
Gauge-invariant critical exponents for the Ginzburg-Landau modelThe critical behavior of the Ginzburg-Landau model is described in a manifestly gauge-invariant manner. The gauge-invariant correlation-function exponent is computed to first order in the 4-d and…H. Kleinert, Adriaan M. J. Schakel·Sep 18, 2002SaveLearn
Charge ordered ferromagnetic phase in La0.5Ca0.5MnO3Mixed valent manganites are noted for their unusual magnetic,electronic and structural phase transitions. The La1-xCaxMnO3 phase diagram shows that below transition temperatures in the range 100-260…James C. Loudon, Neil D. Mathur, Paul A. Midgley·Sep 18, 2002SaveLearn
Three body problem in a dilute Bose-Einstein condensateWe derive the explicit three body contact potential for a dilute condensed Bose gas from microscopic theory. The three body coupling constant exhibits the general form predicted by T.T. Wu [Phys.…Thorsten Koehler·Sep 18, 2002SaveLearn
Wave scattering by discrete breathersWe present a theoretical study of linear wave scattering in one-dimensional nonlinear lattices by intrinsic spatially localized dynamic excitations or discrete breathers. These states appear in…S. Flach, A. E. Miroshnichenko, M. V. Fistul·Sep 18, 2002SaveLearn
A Novel Approach Applied to the Largest Clique ProblemA novel approach to complex problems has been previously applied to graph classification and the graph equivalence problem. Here we apply it to the NP complete problem of finding the largest perfect…Vladimir Gudkov, Shmuel Nussinov, Zohar Nussinov·Sep 17, 2002SaveLearn
Sr2V3O9 and Ba2V3O9: quasi one-dimensional spin-systems with an anomalous low temperature susceptibilityThe magnetic behaviour of the low-dimensional Vanadium-oxides Sr2V3O9 and Ba2V3O9 was investigated by means of magnetic susceptibility and specific heat measurements. In both compounds, the results…E. E. Kaul, H. Rosner, V. Yushankhai et al.·Sep 17, 2002SaveLearn
Experimental Study of Pressure Influence on Tunnel Transport into 2DEGWe present the concept and the results of pilot measurements of tunneling in a system Al/δSi-GaAs under pressure up to 2 GPa at 4.2 K. The obtained results may indicate the following: the…E. M. Dizhur, A. N. Voronovsky, I. N. Kotel'nikov et al.·Sep 17, 2002SaveLearn