Stability of crystals that grow or evaporate by step propagation
作者:
R. Ghez,
H. G. Cohen,
Joseph B. Keller,
期刊:
Applied Physics Letters
(AIP Available online 1990)
卷期:
Volume 56,
issue 20
页码: 1977-1979
ISSN:0003-6951
年代: 1990
DOI:10.1063/1.103016
出版商: AIP
数据来源: AIP
摘要:
We analyze the linear stability of a Stefan‐like problem for moving steps in the context of W. K. Burton, N. Cabrera, and F. C. Frank’s theory of crystal growth [Philos. Trans. R. Soc. (London) A243, 299 (1951)]. Asymmetry and departures from equilibrium at steps are included. The stability criterion depends on supersaturation and average step spacing, both experimentally accessible, and on dimensionless combinations of surface diffusivity, surface diffusion length, and adatom capture probabilities at steps, which can be estimated from bond models. This stability criterion is analyzed and presented graphically in terms of these physical parameters.
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