Theory of local-work-function determination by photoemission from rare-gas adsorbates
Theory of local-work-function determination by photoemission from rare-gas adsorbates
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稀有气体吸附物光电发射测定局域功函数的理论
DOI：
10.1103/physrevb.25.2940
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发表时间：
1982
影响因子：
3.7
通讯作者：
A. R. Williams
中科院分区：
文献类型：
--
作者：
N. D. Lang;A. R. Williams
吸附在表面上的稀有气体原子的光发射提供了一种独特的分析工具，用于确定适合于衬底表面微观小区域的功函数。小区域的化学活性，如台阶和角落，以及局部功函数决定衬底和吸附物电子能级的相对能量的事实使得局部功函数的确定潜在地非常重要。在这里，我们提供了一个详细的稀有气体吸附的特殊方面，使这样的测量可能的微观图片。讨论的基础上的结果的参数自由自洽场计算单个稀有气体原子的自由电子金属。
Photoemission from rare-gas atoms adsorbed on surfaces offers a unique analytical tool for the determination of the work function appropriate to microscopically small regions of a substrate surface. The chemical activity of small regions, such as steps and corners, and the fact that the local work function determines the relative energies of substrate and adsorbate electronic levels makes the determination of the local work function potentially very important. Here we provide a detailed microscopic picture of the special aspects of rare-gas adsorption that make such measurements possible. The discussion is based on the results of parameter-free self-consistent-field calculations for individual rare-gas atoms on a free-electron metal.