Step-flow growth of a crystal surface is considered in the case when the adatom diffusion on the terraces is governed by Lévy flights. A superdiffusive analog of the Burton-Cabrera-Frank (BCF) theory is developed, and the step-flow velocity is found as a function of the terrace width and the anomalous-diffusion exponent. It is shown that the Lévy-flights- controlled step-flow velocity is lower than that in the case of normal diffusion.
ASJC Scopus subject areas
- Physics and Astronomy(all)