Diffusive and subdiffusive step dynamics

Details Diffusive and subdiffusive step dynamics Diffusive and subdiffusive step dynamics

1998-05-28

arxiv.org/abs/cond-mat/9805371v1

Physics

Condensed Matter

11 pages, 4 figures included, needs lamuphys.sty, to appear in Anomalous Diffusion: from Basis to Applications (Lecture Notes

Scientific paper

10.1007/BFb0106851

The dynamics of steps on crystal surfaces is considered. In general, the meandering of the steps obeys a subdiffusive behaviour. The characteristic asymptotic time laws depend on the microscopic mechanism for detachment and attachment of the atoms at the steps. The three limiting cases of step-edge diffusion, evaporation-condensation and terrace diffusion are studied in the framework of Langevin descriptions and by Monte Carlo simulations.

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