GEOMETRIC STRUCTURE OF THE SI(111)-(SQUARE-ROOT-3 X SQUARE-ROOT-3)R30-DEGREES-AU SURFACE

被引：47
作者：
CHESTER, M
GUSTAFSSON, T
机构：
[1] RUTGERS STATE UNIV,SURFACE MODIFICAT LAB,PISCATAWAY,NJ 08855
[2] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104
来源：
SURFACE SCIENCE | 1991年 / 256卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0039-6028(91)91209-G
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：
We have used medium-energy ion scattering to investigate the geometric structure of the Si(111)-(square-root 3 x square-root 3)R30-degrees-Au surface. The ion scattering data show unambiguously that the Au atoms are not located in Si bulk lattice sites and the Si lattice in the surface region is severely distorted. By comparing computer simulations of the experiment for various models of the Si(111)-(square-root 3 x square-root 3)R30-degrees-Au surface, it is found that none of the previously proposed models are compatible with our ion scattering data. A new model involving twisted Au trimers on top of a missing top layer Si lattice is proposed to explain our experimental results.
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收藏
页码：135 / 146
页数：12
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