Publication
Physical Review Letters
Paper

Role of chemical potentials in surface reconstruction: A new model and phase transition of GaAs(111)2x2

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Abstract

The role of chemical potentials in surface reconstructions is examined and shown to be crucial for binary semiconductor srufaces such as GaAs(111)2×2. We predict that under As-rich conditions a new model, the As triangle, is the lowest-energy geometry, whereas the Ga-vacancy model is appropriate for Ga-rich conditions. A change in the relative chemical potential of Ga and As should produce a phase transition between the two structures. © 1986 The American Physical Society.

Date

30 Jun 1986

Publication

Physical Review Letters

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