Impurity-induced diffusion bias in epitaxial growth

Luís A. Nunes Amaral, Joachim Krug

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)7785-7788
Number of pages4
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Issue number6
StatePublished - 1997

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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