Theory of 3dCore Photoemission Spectra in Rare Earth Oxides Series

Systematic analysis is carried out for 3 d core photoemission spectra of rare earth oxides R 2 O 3 (R=La∼Yb) and RO 2 (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 Eu 2 O 3 and Yb 2 O 3 , which is different from that for La 2 O 3 ∼Nd 2 O 3 . We also point out the reason why the RO 2 structure is stable only for R=Ce, Pr and Tb.