Diffusive and subdiffusive step dynamics
arXiv:cond-mat/9805371 · doi:10.1007/BFb0106851
Abstract
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.
11 pages, 4 figures included, needs lamuphys.sty, to appear in Anomalous Diffusion: from Basis to Applications (Lecture Notes in Physics, Springer); eds.: R. Kutner, A. Pekalski and K. Sznajd-Weron