STRUCTURAL STUDY OF THE SI(111)-(SQUARE-ROOT-3XSQUARE-ROOT-3)R30-DEGREES-AU SURFACE USING MEDIUM-ENERGY ION-SCATTERING

被引：16
|
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：
PHYSICAL REVIEW B | 1990年 / 42卷 / 14期
关键词：
D O I：
10.1103/PhysRevB.42.9233
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have used medium-energy ion scattering to investigate the geometric structure of the Si(111)-(3 × 3) R30°-Au surface. Several drastically different models have been proposed which vary in both Au coverage and location of the Au atoms relative to the Si substrate. Our results provide several rigid constraints on acceptable models of this surface. We measure a Au coverage of 0.84+0.05 monolayer and argue that the nominal Au coverage for this surface should be 1.0 monolayer. Furthermore, the Au atoms are not located in Si bulk sites and the Si lattice in the surface region is severely distorted. © 1990 The American Physical Society.
引用
收藏
页码：9233 / 9236
页数：4
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