Surface self diffusion at high temperatures: New simulational insights

I. I. Suni, E. G. Seebauer

Research output: Contribution to journalArticlepeer-review

Abstract

Surface self diffusion has been simulated using both Lennard-Jones and Stillinger-Weber potentials in order to explain why experimental activation energies and pre-exponential factors increase greatly at large fractions of the substrate melting point. With both potentials, these effects are observed clearly in simulations and are caused by the proliferation of adatom-vacancy pairs at these temperatures. At the very highest temperatures near melting, the activation energy and prefactor decrease again as the diffusion becomes liquid like.

Original languageEnglish (US)
Pages (from-to)229-234
Number of pages6
JournalThin Solid Films
Volume272
Issue number2
DOIs
StatePublished - Jan 15 1996

Keywords

  • Surface defects
  • Surface diffusion
  • Surface melting

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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