DIFFUSION PATH FOR AN AL ADATOM ON AL(001)

被引：337

作者：

FEIBELMAN, PJ

机构：

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.65.729

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The barrier to self-diffusion on Al(001) by concerted displacement in a 100 or 010 direction is predicted to be smaller than 1/3 that for ordinary Al-adatom hopping over bridges between fourfold hollows. The transition state for the concerted motion corresponds to an Al ad-dimer symmetrically located above a surface site vacated by one of the dimer atoms. Covalent bonding in this configuration is favorable because each of the (trivalent) Al atoms above the surface bonds to the other, and to two surface atoms. © 1990 The American Physical Society.

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页码：729 / 732

页数：4

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