Abstract
We review the relationship between the thermodynamic stability of a particular surface orientation and the properties of the equilibrium crystal shape. In particular we discuss how the formation of a sharp edge in the equilibrium crystal shape when temperature or impurity pressure is changed manifests itself by reversible surface faceting. We describe some examples of this phenomenon, concentrating on our recent studies of the temperature-induced faceting on vicinal Si(111) surfaces. We briefly consider the role of surface diffusion in the interpretation of surface faceting.
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