The formation, ripening and stability of epitaxially strained island arrays

Details The formation, ripening and stability of epitaxially strained island arrays The formation, ripening and stability of epitaxially strained island arrays

2002-11-12

arxiv.org/abs/cond-mat/0211237v1

Physics

Condensed Matter

Materials Science

4 pages with 4 eps figures

Scientific paper

We study the formation and evolution of coherent islands on lattice mismatched epitaxially strained films. Faceted islands form in films with aniostropic surface tension. Under annealing, these islands ripen until a stable array is formed, with an island density which increases with film thickness. Under deposition, an island shape transition occurs, which leads to a bimodal island size distribution. In films with isotropic surface tension we observe continual ripening of islands above a certain film thickness. A stable wavy morphology is found in thinner films.

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