Enhanced instability of strained alloy films due to compositional stresses

B. J. Spencer, P. W. Voorhees, J. Tersoff

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

Abstract

A single-component strained film is known to be unstable to the stress-driven morphological instability. Here, we determine how the instability is modified in an alloy film by considering the effect of compositional stresses due to an atomic size difference. We find that the coupling of composition to stress always makes the film more unstable to the formation of stress-driven surface undulations. The destabilization is greatest over a range of intermediate deposition rates.

Original languageEnglish (US)
Pages (from-to)2449-2452
Number of pages4
JournalPhysical review letters
Volume84
Issue number11
DOIs
StatePublished - 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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