Non-Nearest-Neighbor Jumps in 2D Diffusion: Pd on W(110)

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A variety of jumps has in the past been identified in diffusion of atoms on 1D channeled surfaces. To establish the jump processes important in diffusion on a 2D surface, the movement of individual Pd atoms has been examined on W(110). From the distribution of displacements of Pd at high temperatures, double jumps are found along the close-packed [Formula presented]. For the first time, sizable differences are also observed between the mean-square displacements along [Formula presented] and [Formula presented], which demonstrate unexpected contributions from jumps along [Formula presented], but not along [Formula presented]. These jumps proceed over activation barriers higher than for single jumps, under conditions predicted from previous work with Pd on the channeled W(211).

Original languageEnglish
Number of pages1
JournalPhysical Review Letters
Volume88
Issue number23
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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