Rotation of Ge ad-dimers on Ge(001)

被引：3
|
作者：
Afanasieva, TV
Koval, IF
Nakhodkin, NG
Pyatnitsky, MY
Zandvliet, HJW
机构：
[1] Natl Taras Shevchenko Univ Kyiv, Dept Radiophys, UA-03033 Kiev, Ukraine
[2] Univ Twente, Fac Appl Phys, MESA, Res Inst, NL-7500 AE Enschede, Netherlands
来源：
SURFACE SCIENCE | 2001年 / 482卷
关键词：
germanium; surface diffusion;
D O I：
10.1016/S0039-6028(01)00805-6
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：
Structural calculations of the Ge ad-dimer rotation on Ge(0 0 1)-2 x I and Ge(0 0 I)-c(4 x 2) surfaces were performed by ab initio and semiempirical methods. Besides the two (already known) stable adsorption sites on top of the substrate dimer rows (angles between substrate dimer bond and ad-dimer bond are 0 degrees and 90 degrees, respectively) a new local minimum was found. The angle between the substrate dimer bond and the ad-dimer of this local minimum is about 45 degrees. This theoretical result might explain the observation of the so-called A/B Ge ad-dimers on Ge(0 0 1). (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：702 / 707
页数：6
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