Reentrant morphological instability of epitaxial islands

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The morphological stability of two-dimensional islands nucleated on a square-symmetry substrate during vacuum atom deposition is investigated by analytic scaling arguments and kinetic Monte Carlo simulations. It is shown that nonequilibrium, dendritic-skeletal island shapes may be converted into compact, equilibrium ones by increasing the deposition rate, in contrast with simple expectation. Our results imply that epitaxial islands generically should undergo a reentrant morphological transition with varying deposition rate. Stable, compact shapes should in principle exist only at intermediate values of the deposition rate.

Original languageEnglish (US)
Pages (from-to)17016-17022
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number24
DOIs
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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