Stability and diffusion of surface clusters

Details Stability and diffusion of surface clusters Stability and diffusion of surface clusters

1999-01-20

arxiv.org/abs/cond-mat/9901198v1

Physics

Condensed Matter

5 pages, 4 figures, submitted to European Physical Journal B

Scientific paper

10.1007/s100510050885

Using kinetic Monte Carlo simulations and a bond-counting ansatz, thermal stability and diffusion of an adatom island on a crystal surface are studied. At low temperatures, the diffusion constant $D$ is found to decrease for a wide range of island sizes like $D \propto N^{-\alpha}$, where $\alpha$ is close to one, $N$ being the number of adatoms in the cluster. By heating up the surface, the system undergoes a phase transition above which the island disappears. Characteristics of that transition are discussed.

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