SURFACE-DIFFUSION MODES FOR PT DIMERS AND TRIMERS ON PT(001)

被引：92

作者：

KELLOGG, GL ^{[1
]}

VOTER, AF ^{[1
]}

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.67.622

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Field-ion-microscope observations and molecular statics calculations using embedded-atom-method potentials have identified the surface diffusion modes for Pt dimers and trimers on Pt(001). Dimers migrate by a series of displacements involving exchange between one of the dimer atoms and a substrate atom and have a lower activation barrier for diffusion than monomers. Trimer diffusion involves both exchange and hopping displacements and has an activation barrier comparable to monomers.

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页码：622 / 625

页数：4

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