Structural analysis of Si(111)-√21 x √21-(Ag,Au) surface by using reflection high-energy positron diffraction

被引：12

作者：

Fukaya, Y. ^{[1
]}

Kawasuso, A. ^{[1
]}

Ichimiya, A. ^{[1
,2
]}

机构：

[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, Takasaki, Gunma 3701292, Japan

[2] Japan Womens Univ, Fac Sci, Bunkyo Ku, Tokyo 1128681, Japan

来源：

SURFACE SCIENCE | 2007年 / 601卷 / 22期

关键词：

surface structure; reflection high-energy positron diffraction (RHEPD); total reflection; silicon; silver; gold;

D O I：

10.1016/j.susc.2007.04.188

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：

The An adsorption induced root 21 x root 21 super-lattice structure on the Si(111)-root 3 x root 3-Ag structure has been investigated using reflection high-energy positron diffraction. The height of the Au adatom was determined to be 0.59 angstrom from the underlying Ag layer from the rocking curve analysis with the dynamical diffraction theory. The adatoms were preferentially situated at the center of the large Ag triangle of the inequivalent triangle structure of the Si(111)-root 3 x root 3-Ag substrate. From the intensity distribution in the fractional-order Lane zone, the in-plane coordinate of the An adatoms was obtained. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：5187 / 5191

页数：5

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