Electron-Electron Correlation, Resonant Photoemission and X-Ray Emission Spectra

J. Parlebas, A. Kotani, Satoshi Tanaka
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Abstract

In this short review paper we essentially focus on the high energy spectroscopies which involve second order quantum processes, i.e., resonance photoemission, Auger and X-ray emission spectroscopies, denoted respectively by RXPS, AES and XES. First, we summarize the main 3P-RXPS and AES results obtained in Cu and Ni metals; especially we recall that the satellite near the 3P-threshold in the spectra, which arises from a d-hole pair bound state, needs a careful treatment of the electron-electron correlation. Then we analyze the RXPS spectra in a few Ce compounds (Ce02, Ce20a and CeFa) involving 3d or 4d core levels and we interpret the spectra consistently with the other spectroscopies, such as core XPS and XAS which are first order quantum processes. Finally within the same one-impurity model and basically with the same sets of parameters, we review a theory for the Ce 5p-+ 3d XES, as well as for the corresponding RXES, where (1) the incident X-ray is tuned to resonate with the 3d -+4! transition and (2) the X-ray emission due to the 5p-+3d transition is actually observed. The paper ends with a general discussion.
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电子-电子相关,共振光发射和x射线发射光谱
在这篇简短的综述文章中,我们主要关注涉及二阶量子过程的高能光谱,即共振光发射光谱、俄歇光谱和x射线发射光谱,分别用RXPS、AES和XES表示。首先,总结了Cu和Ni金属中获得的主要3P-RXPS和AES结果;特别是我们记得,在光谱中靠近3p阈值的卫星,它是由d空穴对束缚态产生的,需要仔细处理电子-电子相关。在此基础上,对Ce02、Ce20a和CeFa等铈化合物的三维或四维核能级的RXPS光谱进行了分析,并与核心XPS和XAS等一阶量子过程的光谱进行了一致的解释。最后,在相同的单杂质模型和基本相同的参数集下,我们回顾了Ce 5p-+ 3d x射线的理论,以及相应的rx射线,其中(1)入射x射线被调谐为与3d -+4!(2)实际观测到5p-+三维跃迁引起的x射线辐射。论文最后作了一般性讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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