Lattice Effects in Crystal Evaporation

Details Lattice Effects in Crystal Evaporation Lattice Effects in Crystal Evaporation

1993-11-30

arxiv.org/abs/cond-mat/9311063v1

Physics

Condensed Matter

DRFMC/SPSMS/MDN, Centre d'Etudes Nucleaires de Grenoble, 25 pages, LaTex, revtex style. 8 Figures, available upon request, rep

Scientific paper

10.1088/0305-4470/27/6/013

We study the dynamics of a stepped crystal surface during evaporation, using the classical model of Burton, Cabrera and Frank, in which the dynamics of the surface is represented as a motion of parallel, monoatomic steps. The validity of the continuum approximation treated by Frank is checked against numerical calculations and simple, qualitative arguments. The continuum approximation is found to suffer from limitations related, in particular, to the existence of angular points. These limitations are often related to an adatom detachment rate of adatoms which is higher on the lower side of each step than on the upper side ("Schwoebel effect").

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