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对材料表面电子结构的研究,是固体表面物理研究的一个重要方面。近年来在扫描隧道显微镜(STM)基础上发展的扫描隧道谱(STS)技术,显示出在表面电子结构研究中独特的性质。它的一大特点是与STM结合,可以给出空间可分辨的表面价态和空态密度分布。这对于表面不同原子和不同微结构处局域电子态的研究具有重要意义。本文利用国内生产的大气中的STM系统进行改装,发展了STM/STS谱仪。利用这台系统,对砷化镓(100)和
The study of the electronic structure of the material surface is an important aspect of solid surface physics research. In recent years, Scanning Tunneling Spectroscopy (STS) developed on the basis of Scanning Tunneling Microscope (STM) has shown unique properties in the study of surface electronic structure. One of its major features is combined with the STM, which gives a spatially resolved surface valence and void density distribution. This is of great significance for the study of the local electronic states at different surface and different microstructures. In this paper, the domestic production of the atmosphere of the STM system for conversion, the development of the STM / STS spectrometer. Use this system for gallium arsenide (100) and