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Títol:	Modelization of surface diffusion of a molecular dimer
Autor/a:	Romero, A. H.; Lacasta Palacio, Ana María; Sancho, José M.
Altres autors:	Universitat de Barcelona
Abstract:	A simple model for a dimer molecular diffusion on a crystalline surface, as a function of temperature, is presented. The dimer is formed by two particles coupled by a quadratic potential. The dimer diffusion is modeled by an overdamped Langevin equation in the presence of a two-dimensional periodic potential. Numerical simulation¿s results exhibit some dynamical properties observed, for example, in Si2 diffusion on a silicon [100] surface. They can be used to predict the value of the effective friction parameter. Comparison between our model and experimental measurements is presented.
Matèries:	-Física estadística -Termodinàmica -Sistemes dinàmics diferenciables -Matèria condensada -Statistical physics -Thermodynamics -Differentiable dynamical systems -Condensed matter
Drets:	(c) The American Physical Society, 2004
Tipus de document:	Article Article - Versió publicada
Publicat per:	The American Physical Society
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