Abstract
The interactions of atoms or clusters of atoms adsorbed on a surface due to elastic strains created in the substrate is investigated. At large distances it falls off ass −3. The strength of the interaction which is repulsive for elastically isotropic substrates becomes angular dependent in general and becomes even attractive in certain directions for substrates with sufficient anisotropy. For a certain model of a cluster the interaction among clusters is calculated at all distances for the isotropic as well as for the anisotropic case. A repulsive potential barrier is found at distances of the order of the cluster diameter even in situations where the long-range behaviour is attractive.
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Kappus, W. Elastic interactions of adatoms or clusters on a surface: Effects due to anisotropy of the substrate and finite size of the clusters. Z Physik B 29, 239–244 (1978). https://doi.org/10.1007/BF01321188
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DOI: https://doi.org/10.1007/BF01321188