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一、引言在表面物理的实验研究中,低能电子衍射(LEED)强度谱(I-V曲线)测量常采用测定单晶有序表面及表面化学吸附层原子结构的方法。实验装置如图1。电子枪发出的低能电子束打到样品表面。表面晶格原子列起了衍射光栅的作用,形
I. INTRODUCTION In the experimental study of surface physics, the method of measuring the atomic structure of single crystal ordered surface and surface chemisorption layer is often used in the measurement of low energy electron diffraction (LEED) intensity spectrum (I-V curve). Experimental device shown in Figure 1. Electron gun issued by the low-energy electron beam hit the sample surface. The surface lattice atoms play the role of diffraction grating, shape