Impurity-induced diffusion bias in epitaxial growth
Amaral LAN, Krug JPhysical 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.