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Prepyramid-to-pyramid transition of SiGe islands on Si(001) | | A. Rastelli
; H. von Kaenel
; B. J. Spencer
; J. Tersoff
; | | Date: |
19 Jun 2003 | | Subject: | cond-mat | | Abstract: | The morphology of the first three-dimensional islands appearing during strained growth of SiGe alloys on Si(001) was investigated by scanning tunneling microscopy. High resolution images of individual islands and a statistical analysis of island shapes were used to reconstruct the evolution of the island shape as a function of size. As they grow, islands undergo a transition from completely unfacetted rough mounds (prepyramids) to partially {105} facetted islands and then they gradually evolve to {105} facetted pyramids. The results are in good agreement with the predictions of a recently proposed theoretical model. | | Source: | arXiv, cond-mat/0306491 | | Services: | Forum | Review | PDF | Favorites | |
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