Luís A. Nunes Amaral
Professor of Engineering Sciences and Applied Mathematics
Professor of Medicine (by courtesy)
Professor of Molecular Biosciences (by courtesy)
Professor of Physics & Astronomy (by courtesy)
Chemical & Biological Engineering
2145 Sheridan Road (Room E136)
Evanston, IL 60208, US
Phone:
(847) 491-7850
Impurity-induced diffusion bias in epitaxial growth
Physical Review E 55, 7785-7788 (1997)
Times cited: 10
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 ''barrierlike'' and, in the second, it is ''traplike.'' For the barrier model, we find a symmetry-breaking effect that leads to an overall downhill 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 Kardar-Parisi-Zhang type.