Theory of 3d Core Photoemission Spectra in Rare Earth Oxides Series

Systematic analysis is carried out for 3d core photoemission spectra of rare earth oxides R₂O₃ (R=La~Yb) and RO₂ (R=Ce, Pr, Tb) with the use of the impurity Anderson model. From the comparison of the calculated and experimeutal spectra, we estimate the values of some key parameters such as the charge transfer energy, the strength of the hybridization interaction, etc. We propose a possible mechanism of a satellite in the spectra for Eu₂O₃ and Yb₂O₃, which is different from that for La₂O₃~Nd₂O₃. We also point out the reason why the RO₂ structure is stable only for R=Ce, Pr and Tb.