3 years ago
Effect of Step Anisotropy on Crystal Growth Inhibition by Immobile Impurity Stoppers
Robert V. Kohn, James P. Lee-Thorp, Alexander G. Shtukenberg
Step pinning by adsorbed impurities is an important crystal growth inhibition mechanism. A seminal 1958 study by Cabrera and Vermilyea considered a periodic array of pinning sites. We revisit this problem using numerical simulations and a new type of analytical approximation, for anisotropic surface energies that induce faceting. The average step velocity is surprisingly insensitive to anisotropy.
Publisher URL: http://dx.doi.org/10.1021/acs.cgd.7b01006
DOI: 10.1021/acs.cgd.7b01006
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