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arXiv · cond-mat/9609087

Impurity-induced diffusion bias in epitaxial growth

Luis A. Nunes Amaral·Joachim Krug
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Abstract

We introduce two models for the action of impurities in epitaxial growth. In the first, the interaction between the diffusing adatoms and the impurities is ``barrier''-like and, in the second, it is ``trap''-like. For the barrier model, we find a symmetry breaking effect that leads to an overall down-hill current. As expected, such a current produces Edwards-Wilkinson scaling. For the trap model, no symmetry breaking occurs and the scaling behavior appears to be of the conserved-KPZ type.

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Luis A. Nunes Amaral, Joachim Krug. 1996-09-09. Impurity-induced diffusion bias in epitaxial growth. https://doi.org/10.1103/physreve.55.7785

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