Atomic jumps in surface self-diffusion: W on W(110)

Sang Mun Oh, Kentaro Kyuno, Seong Jin Koh, Gert Ehrlich

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Although surface diffusion has been studied on the atomic level for decades, little is known about jump processes in self-diffusion. The diffusion of W atoms on the densely packed W(110) plane has therefore been examined, using the field ion microscope to probe contributions of jumps other than between nearest-neighbor sites. Measurements of the mean-square displacements of atoms along the x and y axes (〈001〉 and 〈110〉, respectively) and of the detailed spatial distribution of atomic displacements serve to define the nature of the jumps important in diffusion. It is shown that, in addition to nearest-neighbor and second-nearest-neighbor transitions along the close-packed 〈111〉, atoms also carry out jumps along 〈001〉 and 〈110〉, and that the contribution from these processes increases rapidly with temperature.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number23
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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