Adatom and dimer migration in heteroepitaxy: Co/Pt(1 1 1) |
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Authors: | C. Goyhenex |
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Affiliation: | Institut de Physique et Chimie des Matériaux de Strasbourg, Groupe Surfaces et Interfaces, UMR 7504, 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 02, France |
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Abstract: | By means of tight-binding molecular-dynamics simulations, Co adatom and dimer migration on a Pt(1 1 1) surface is investigated. Combining static and dynamic calculations, activation energies associated to these processes are determined. Since the size mismatch between Co and Pt is large, the presented simulations provide an illustration of the way in which growth can be affected by size effects in heteroepitaxy. In particular an increase of the mobility is found for Co dimers (heteroepitaxy) relatively to Pt ones (homoepitaxy). |
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Keywords: | Cobalt Diffusion Heteroepitaxy Molecular dynamics simulation Platinum |
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