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Title: Modelization of surface diffusion of a molecular dimer
Author: Romero, A. H.
Lacasta Palacio, Ana María
Sancho, José M.
Keywords: Física estadística
Sistemes dinàmics diferenciables
Matèria condensada
Statistical physics
Differentiable dynamical systems
Condensed matter
Issue Date: 2004
Publisher: The American Physical Society
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.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2004, vol. 69, p. 051105(1)-051105(4)
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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