Ce Electronic Structure Studied by Resonant Electron Spectroscopies

In Ce compounds, strong resonant effects are observed in high energy photoemission spectra, both at the Ce M4, 5 and Ce L2, 3 absorption edges for the Ce 4d and Ce 3d photoemission peaks, respectively. In the mixed valent compounds, for the photoemission peaks corresponding to mainly 4f0, 4f1 and 4f2 character of the final state, the resonance occurs at different photon energies making it possible to unravel the X-ray absorption profiles. Moreover resonant L2, 3M4, 5N4, 5 Raman Auger lines are observed up to 10 eV above the L2 and L3 absorption edge jumps, showing the strong localization of the core excited state. These results help to understand the validity and the limits of atomic models for the description of the electronic and magnetic properties of these systems