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

H.M. Zhang; R.I.G. Uhrberg

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

机译：Ag / Ge（111）的扫描隧道显微镜研究：表面重建转变的观察

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The 6 x 6 and 39~(1/2) x 39~(1/2) phases of Ag/Ge(111) have been studied by scanning tunneling microscopy (STM). Surface atomic structures of the 6 x 6 and the 39~(1/2) x 39~(1/2) phase are proposed in terms of additional Ag adatoms on top of a 3~(1/2) x 3~(1/2) layer described by the honeycomb-chain-trimer (HCT) model. By varying the STM tip bias, the reconstruction can be changed reversibly between the 39~(1/2) x 39~(1/2) and the 6 x 6 phase. Besides the switching between two different phases, it is also possible to flip the domain orientation of the 39~(1/2) x 39~(1/2) phase. The mechanisms of the reconstruction transformation have been discussed in terms of the role of the STM tip.

机译：Ag / Ge（111）的6 x 6和39〜（1/2）x 39〜（1/2）相已通过扫描隧道显微镜（STM）进行了研究。根据3〜（1/2）x 3〜（1）顶部的额外Ag原子，提出了6 x 6和39〜（1/2）x 39〜（1/2）相的表面原子结构。 / 2）蜂窝链三聚体（HCT）模型描述的层。通过改变STM尖端偏置，可以在39〜（1/2）x 39〜（1/2）和6 x 6相位之间可逆地更改重建。除了在两个不同相位之间进行切换之外，还可以翻转39〜（1/2）x 39〜（1/2）相的域取向。就STM笔尖的作用已讨论了重构转换的机制。

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来源
《Surface Science》 |2003年第3期|p.L789-L796|共8页
作者
H.M. Zhang; R.I.G. Uhrberg;
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作者单位

Department of Physics and Measurement Technology, Linkoeping University, S-581 83 Linkoeping, Sweden;

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原文格式 PDF
正文语种 eng
中图分类物理学;
关键词
metallic surfaces; silver; germanium; surface structure; morphology; roughness; and topography; scanning tunneling microscopy; surface relaxation and reconstruction;

机译：金属表面;银;锗;表面结构;形态学;粗糙度和形貌;扫描隧道显微镜;表面松弛和重建;

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

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