节点文献
自动张量低能电子衍射对GaAs()-(2×2)表面结构的研究
Surface Structure Analysis of GaAs (1 1 1) (2×2) With Automated Tensor Low Energy Electron Diffraction
【摘要】 本文通过对GaAs(111)-(2×2)表面低能电子衍射(LEED)I-V曲线的分析,首次定量地给出了该表面的复杂结构.结构的主要特征是As三聚体单元吸附在表面T4位置并与下面的As原子相键接,且表面存在较大的表面弛豫.对10个非等价衍射束理论和实验强度曲线之间的比较得到很好的结果.
【Abstract】 Abstract GaAs (1 1 1) (2×2) surface structure has been solved quantitatively by analysis of tensor low energy electron diffraction(TLEED) spectra. The As trimers adsorbed on the T 4 site position and the large buckling of surface atoms characterize this reconstruction keeping reasonable bond lengths. The intensities of 10 nonequivalent beams are compared with a good level of agreement between the calculation and experiment.
- 【文献出处】 半导体学报 ,CHINESE JOURNAL OF SEMICONDUCTORS , 编辑部邮箱 ,1998年12期
- 【分类号】TN304.230.1,O766.4
- 【下载频次】49