Elastic interactions of defects on (111) Au surfaces

K. Sieradzki, F. H. Streitz

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We report on the results of molecular-dynamic simulations of vacancy and vacancy-step interactions on a (111) Au surface. Near the vacancy the strain field decays as r-n with n2 and the dilatational strain undergoes a rapid oscillatory decay to zero at a distance of 1 nm from the vacancy. This result suggests that there is no direct long-range elastic interaction between vacancies on this surface. The elastic interaction between a vacancy and a step only becomes significant at separations of less than 1 nm and is controlled by a mixing of the oscillatory pressure field of the step with the dilatational field of the vacancy. Our calculations indicate that a vacancy on the upper portion of a terrace associated with a step has to overcome an energy barrier of 0.1 eV in order for vacancy annihilation to occur at the step edge.

Original languageEnglish (US)
Pages (from-to)11433-11436
Number of pages4
JournalPhysical Review B
Volume45
Issue number19
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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