Scanning tunneling microscopy study of Ag/Ge(111): observation of surface reconstruction transformations

被引：12
|
作者：
Zhang, HM [1 ]
Uhrberg, RIG [1 ]
机构：
[1] Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
来源：
SURFACE SCIENCE | 2003年 / 546卷 / 2-3期
关键词：
metallic surfaces; silver; germanium; surface structure; morphology; roughness; and topography; scanning tunneling microscopy; surface relaxation and reconstruction;
D O I：
10.1016/j.susc.2003.09.036
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The 6 x 6 and root39 x root39 phases of Ag/Ge(111) have been studied by scanning tunneling microscopy (STM). Surface atomic structures of the 6 x 6 and the root39 x root39 phase are proposed in terms of additional Ag adatoms on top of a root3 x root/3 layer described by the honeycomb-chain-trimer (HCT) model. By varying the STM tip bias, the reconstruction can be changed reversibly between the root39 x root39 and the 6 x 6 phase. Besides the switching between two different phases, it is also possible to flip the domain orientation of the root39 x root39 phase. The mechanisms of the reconstruction transformation have been discussed in terms of the role of the STM tip. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：L789 / L796
页数：8
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