Size-mismatch disorder at the surface of semiconductors

Normand Mousseau, M. F. Thorpe

Research output: Contribution to journalArticle

7 Scopus citations


We study the effects of size-mismatch disorder on the surface relaxation of semiconductor solid solutions. Assuming a Kirkwood-type potential, we obtain an analytic solution for the nearest-neighbor distances and their distributions as a function of the distance from the surface as well as the displacements at the (111) and (100) surfaces. This solution is also valid for bond-mismatch disorder and is checked against computer simulations for two-dimensional triangular networks along (10) and (11) surfaces. Predictions are made for the topography of the (111) surface of a SiGe alloy.

Original languageEnglish (US)
Pages (from-to)2660-2667
Number of pages8
JournalPhysical Review B
Issue number4
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Condensed Matter Physics

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