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
Rok vydání:	2000
Předmět:	Diffraction Crystallography Materials science Electron diffraction Nucleation General Physics and Astronomy Crystal growth Surface layer Epitaxy Surface reconstruction Molecular beam epitaxy
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
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c484bb1834af8536662c595da52b430a https://doi.org/10.1103/physrevlett.84.4649 Zobrazit plný text záznamu