Chemisorption of a Ag atom on a Si(100) 2x1 surface: Local surface deformation

被引：13
|
作者：
Okon, JC [1 ]
Joachim, C [1 ]
机构：
[1] CEMES,LOE,CNRS,F-31055 TOULOUSE,FRANCE
来源：
SURFACE SCIENCE | 1997年 / 376卷 / 1-3期
关键词：
chemisorption; semi-empirical models and model calculations; surface relaxation and reconstruction;
D O I：
10.1016/S0039-6028(96)01563-4
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：
In the initial step of the Si(100) surface metallization, it is shown that chemisorption of a Ag atom in a cave site is due to the Si(100) surface local deformation to match the small Si-Ag bond length. With a frozen Si(100)2x1 surface, Ag is not adsorbed in a cave site but laterally, bonded to a single surface Si. The STM image calculated with Ag in a cave site is ovoidal, extending over the two bonded Si. This shows that the appearance of Ag in an STM image is due to the local electronic structure of the Si-Ag-Si bonds and not to the vibrations of Ag parallel to the surface. (C) 1997 Elsevier Science B.V.
引用
收藏
页码：L409 / L413
页数：5
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