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GaAs(2 5 11): a new stable surface within the stereographic triangle.

Authors
  • Geelhaar, L
  • Márquez, J
  • Kratzer, P
  • Jacobi, K
Type
Published Article
Journal
Physical review letters
Publication Date
Apr 23, 2001
Volume
86
Issue
17
Pages
3815–3818
Identifiers
PMID: 11329331
Source
Medline
License
Unknown

Abstract

The atomic structure of GaAs(2 5 11), a hitherto unknown stable surface, has been determined by in situ scanning tunneling microscopy and first-principles electronic structure calculations. This orientation is located within the stereographic triangle, i.e., far away from all low-index surfaces. A low-energy ( 1x1) reconstruction containing arsenic dimers forms on the surface. The analysis of the surface structure shows that, for semiconductor surfaces, the gain in stability due to minimization of the number of dangling bonds is more important than the gain from rendering a semiconducting ground state.

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