SURFACE SELF-DIFFUSION ON PT(001) BY AN ATOMIC EXCHANGE MECHANISM

被引：356

作者：

KELLOGG, GL

FEIBELMAN, PJ

机构：

[1] Sandia National Laboratories

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.64.3143

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Field-ion microscopy has been used to map the surface sites visited by an individual Pt adatom migrating at 175 K on the Pt(001) plane and to determine its activation energy for surface diffusion. Atomic displacements are found to occur only in the [100] or [010] directions. A surprisingly low activation energy of 0.47 eV is measured. These results are consistent with a model in which the diffusion occurs by an adatom-substrate exchange mechanism. This mechanism is predicted theoretically for self-diffusion on Al(001). © 1990 The American Physical Society.

引用

页码：3143 / 3146

页数：4

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