Stability and diffusion of surface clusters |
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Authors: | T Müller W Selke |
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Institution: | (1) Institut für Theoretische Physik, Technische Hochschule, 52056 Aachen, Germany, DE |
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Abstract: | 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 , where 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.
Received 20 January 1999 |
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Keywords: | PACS 68 35 Fx Diffusion interface formation - 82 20 Wt Computational modeling simulation - 36 40 Sx Diffusion and dynamics of clusters |
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