Dislocations, phason defects, and domain walls in a one-dimensional quasiperiodic superstructure of a metallic thin film

被引：18

作者：

Ebert, P ^{[1
]}

Chao, KJ

Niu, Q

Shih, CK

机构：

[1] Univ Texas, Dept Phys, Austin, TX 78712 USA

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.83.3222

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigated disorder and structural defects in a one-dimensional quasiperiodic superstructure of a thin Ag him on GaAs(110) surfaces by scanning tunneling microscopy. The superstructure forms sequences with long and short separations exhibiting a self-similarity. We demonstrate that the modulation can be described best with a Fibonacci sequence and deviations are due to structural defects. We identify dislocations, phason defects, and domain walls. The static stress field of dislocations is found to be a source of phason defects.

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页码：3222 / 3225

页数：4

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