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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.101: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Simulation of heteroepitaxial growth and surface alloy formation — •Sebastian Weber¹, Michael Biehl², Thorsten Volkmann¹, and Miroslav Kotrla³ — ¹Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg — ²Institute for Mathematics and Computing Science, University of Groningen, P.O. Box 800, NL-9700 AV Groningen — ³Institute of Physics, Academy of Sciences of the Czech Republic, Prague

We study the hetero-epitaxial growth of an fcc(111) crystal surface, in which the lattice spacing of adsorbate materials differ from that of the substrate. We employ off-lattice equilibrium and kinetic Monte Carlo simulations based on simple model interactions with a Lennard Jones pair potential between the particle species. Emphasis is on the formation of monolayers of binary adsorbates with a nontrivial composition profile. One important aspect is the formation of nano-structured surface alloys and the dependence on growth temperature and lattice mismatch.