Capability of Resonant Photoemission with Soft X-Rays in Rare-Earth Systems

We theoretically discuss the capability of resonant photoemission with soft X-rays in clarifying the valence electronic state, by choosing Ce 4 d core X-ray photoemission spectroscopy (4 d XPS) at the Ce 3d threshold in CeRh 3 B 2 with hexagonal crystal structure. On the basis of the Anderson model including multiplet splitting, we show that the dependence of 4 d XPS on the energy and the linear polarization with respect to the hexagonal c -axis of the incident photon and the binding energy can be a powerful characteristic for probing a proposed uniaxial anisotropic distribution of 4 f electrons.