Structure of III-Sb(001) Growth Surfaces: The Role of Heterodimers
Autor: | W. Barvosa-Carter, Lloyd J. Whitman, James C. Culbertson, Normand A. Modine, B. Z. Nosho, Efthimios Kaxiras, Hanchul Kim, Benjamin V. Shanabrook, Allan S. Bracker |
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Rok vydání: | 2000 |
Předmět: | |
Zdroj: | Physical Review Letters. 84:4649-4652 |
ISSN: | 1079-7114 0031-9007 |
Popis: | We have determined the structure of AlSb and GaSb (001) surfaces prepared by molecular beam epitaxy under typical Sb-rich device growth conditions. Within the range of flux and temperature where the diffraction pattern is nominally $(1\ifmmode\times\else\texttimes\fi{}3)$, we find that there are actually three distinct, stable $(4\ifmmode\times\else\texttimes\fi{}3)$ surface reconstructions. The three structures differ from any previously proposed for these growth conditions, with two of the reconstructions incorporating mixed III-V dimers within the Sb surface layer. These heterodimers appear to play an important role in island nucleation and growth. |
Databáze: | OpenAIRE |
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