DISLOCATION MECHANISM FOR ISLAND DIFFUSION ON FCC (111) SURFACES

被引：114

作者：

HAMILTON, JC ^{[1
]}

DAW, MS ^{[1
]}

FOILES, SM ^{[1
]}

机构：

[1] SANDIA NATL LABS,LIVERMORE,CA 94550

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.74.2760

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe a novel mechanism for diffusion of homoepitaxial 2D islands on fcc (111) surfaces by nucleation and motion of misfit dislocations. Embedded atom method molecular dynamics calculations show that this mechanism will compare favorably with edge running and simultaneous gliding for islands up to some tens of atoms in size. We suggest that this mechanism may facilitate diffusion of heteroexpitaxial strained overlayer islands containing dislocations in their lowest energy configurations. © 1995 The American Physical Society.

引用

页码：2760 / 2763

页数：4

共 22 条

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