Roles of Dynamical Screening by the 5d and 4f-Electrons in the Optical Excitation Spectra of Ce-Pnictides
Roles of Dynamical Screening by the 5d and 4f-Electrons in the Optical Excitation Spectra of Ce-Pnictides
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5d 和 4f 电子在 Ce-Pnictides 光学激发光谱中的动态屏蔽作用
DOI：
10.1143/jpsj.60.666
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发表时间：
1991
影响因子：
1.7
通讯作者：
T. Kasuya
中科院分区：
文献类型：
--
作者：
M. Takeshige;O. Sakai;T. Kasuya
考虑5d和4f电子的屏蔽，分析了CeSb的核心能级和4f价电子光电子发射光谱。计算是基于聚类模型进行的。 5 d 电子的屏蔽导致4 f 和带电子之间的混合值的能量依赖性降低。作为 5 d 电子动态筛选的直接证据，预计卫星的结合能比主峰高约 10 eV，强度约为主峰的一半。该卫星对应于 p - d 反键合状态，并解释了实验中看到的归因于等离子体边带的峰值。预计 Sb 站点的核心级 XPS 中也会出现类似的卫星。
The core-level and the 4 f -valence electron photoemission spectra of CeSb are analyzed considering the screening by both the 5 d and the 4 f -electron. The calculation is done based on the cluster model. The screening by the 5 d -electron leads to the energy dependent reduction of the mixing value between the 4 f and the band-electrons. As a direct evidence of the dynamical screening by the 5 d -electron, a satellite is expected at about 10 eV higher binding energy than the main peak with about a half of intensity for the main peak. This satellite corresponds to the p - d anti-bonding state and explains the peak seen in the experiment which has been attributed to the plasmon side band. Similar satellite is expected also in the core-level XPS of the Sb site.