W adatom-adatom interactions on the W(110) surface

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11 Scopus citations

Abstract

We report a theoretical study of W adatom-adatom interactions on the W(110) surface, using a modified fourth moment approximation to tight-binding theory. The binding sites and interaction energies of adatom pairs on the (110) surface are determined. The present calculations indicate a strong angular anisotropy for adatom-adatom interactions and oscillatory behavior of interactions along a given direction which is consistent with recent field ion microscopy (FIM) observations [Watanabe and Ehrlich, Phys. Rev. Lett. 62 (1989) 1146]. A simple bond coordination argument has been proposed to explain the short range interactions. For long ranges, the interaction is slightly repulsive, due to indirect elastic interactions via the substrate.

Original languageEnglish (US)
Pages (from-to)241-246
Number of pages6
JournalSurface Science
Volume339
Issue number3
DOIs
StatePublished - Oct 1 1995
Externally publishedYes

Keywords

  • Adatoms
  • Atom-solid interactions
  • Clusters
  • Computer simulations
  • Construction and use of effective interatomic interactions
  • Diffusion and migration
  • Single crystal surfaces
  • Surface diffusion
  • Tungsten

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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