Step-edge barriers on pt(111): An atomistic view

Kentaro Kyuno, Gert Ehrlich

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Abstract

The escape of platinum from Pt(111) islands has been examined in the field ion microscope to obtain a direct view of atomic events. No effective barrier to the escape of platinum clusters larger than dimers is found at step edges, but incorporation of individual adatoms is nevertheless more effective at low temperatures. From the temperature dependence of the rate of atom disappearance from Pt(111) islands, the additional step-edge barrier is found as 0.06 ± 0.01eV, quite small compared with the diffusion barrier of 0.26 eV, and in sharp contrast with deductions from growth experiments.

Original languageEnglish
Pages (from-to)5592-5595
Number of pages4
JournalPhysical Review Letters
Volume81
Issue number25
DOIs
Publication statusPublished - 1998 Jan 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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