CdTe（111）表面碱金属吸附的电子结构特性研究

ELECTRONIC STRUCTURE OF ALKALI METALS ADSORBED ON CdTe(111) SURFACES

从理论和实验两个方面对ＣｄＴｅ（１１１）表面碱金属吸附的电子结构特性进行了研究．实验结果表明碱金属Ｋ在ＣｄＴｅ（１１１）表面吸附是Ｃｄ替位吸附，它影响了ＣｄＴｅ（１１１）表面的表面态分布，产生了费密钉扎现象．在理论方面，首先采用线性糕模轨函数（ＬＭＴＯ）方法对ＣｄＴｅ（１１１）表面的Ｋ吸附电子结构特性作了研究，得出了与实验符合的结果．对碱金属在ＣｄＴｅ（１１１）表面的吸附电子结构特性系统对比研究表明ＣｄＴｅ（１１１）表面的碱金属吸附特性不仅受碱金属原子序数的影响。

The electronic structure of CdTe(111) surfaces with adsorbed alkali metals has been explored by synchrotron radiation and LMTO method. The experimental results showed that the surface states were redistributed when K adsorbed and Fermi pinning phenomena appeared. Theoretical calculations of K adsorbed on CdTe(111) surfaces agree well with the experiment. A systematic study of alkali metals adsorbed on CdTe(111) surfaces showed that the electronic structure characteristics not only depend on the atomic number of the alkali metals, but are also related to the core electron configurations.