CONFIGURATION-DEPENDENT HYBRIDIZATION IN ELECTRON SPECTROSCOPIES OF CE-BASED COMPOUNDS

In this paper, we analyze Ce 3d core-level photoemission and inverse-p hotoemission spectra in the framework of the single-impurity Anderson model. We show that the Gunnarsson-Schonhammer model generally used to describe spectroscopic properties of Ce-based systems cannot account for the description of core-hole photoemission and inverse-photoemissi on spectra with the same set of parameters. By introducing 4f configur ation-dependent hybridization terms, the situation is significantly im proved, and a satisfactory agreement between experimental and calculat ed spectra is obtained. This result shows that, in contrast to what wa s previously claimed for highly hybridized compounds, the spectroscopi c data of cerium compounds can be described in the framework of the si ngle-impurity Anderson model.