Abstract
Abstract Interplay between atomic multiplet and solid-state hybridization often plays an important role in the core-level spectroscopy of f and d electron systems. Here a short review is given of theoretical analyses of core-level spectra in rare-earth oxide systems, where the effects of the intra-atomic multiplet coupling and interatomic hybridization are taken into account with the impurity Anderson model. Some examples of theoretical calculations are shown for 3d X-ray photoemission spectra (XPS) and 4d X-ray absorption spectra (XAS) of CeO 2 and for 4d XPS of Pr 2 O 3 . For 4d XPS of heavy rare-earth systems, the effect of term-dependent lifetime of the 4d core hole is shown to be essential in explaining the spectral shape. A recent analysis of resonant X-ray emission spectra for CeO 2 is also given.
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