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Modelization of surface diffusion of a molecular dimer

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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.

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Modelization of surface diffusion of a molecular dimer