IDENTIFICATION OF ORDERED ATOMIC STRUCTURES OF BA ON THE SI(100) SURFACE

被引：50

作者：

FAN, WC ^{[1
]}

IGNATIEV, A ^{[1
]}

机构：

[1] UNIV HOUSTON,CTR SPACE VACUUM EPITAXY,HOUSTON,TX 77204

来源：

SURFACE SCIENCE | 1991年 / 253卷 / 1-3期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/0039-6028(91)90600-W

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：

Three long-range ordered atomic structures of (2 X 3), (1 X 2) and (2 X 4) phases have been observed by low-energy electron-diffraction (LEED) in the Ba/Si(100) surface at submonolayer Ba coverages (theta < 1 ML). The relationship between the observed phases for Ba on the Si(100) surface have been described as a function of Ba coverage and anneal temperature. Possible models of the surface atomic structures for the ordered phases are proposed by assuming Ba atomic chains in the Ba overlayer. A diffuse c(4 X 4)-like pattern has also been observed in the Ba/Si(100) system at high Ba exposure (> 2 ML), which might result from Ba diffusion and possible formation of a barium silicide.

引用

页码：297 / 302

页数：6