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Crossover from Dimer Nucleation to Adatom Exchange During Submonolayer Epitaxy

Published online by Cambridge University Press:  21 February 2011

G.S. Bales
G.S. Bales*
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
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Abstract

The nucleation and growth of islands in the early stages of epitaxial growth is studied with kinetic Monte Carlo Simulations and self-consistent mean field rate equations. Specifically, adatom exchange and irreversible dimer formation are allowed to compete equally as the origin of two-dimensional islands. The island size distribution and number density are found to satisfy a dynamic crossover scaling form. The critical island size evolves from one to zero with increasing temperature, decreasing flux, and increasing coverage.

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References

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