Abstract
Electron correlation in 4f orbitals strongly influences the low energy properties of Ce and its inter-metallic compounds. By exploiting the different surface sensitivity of valence band resonant photoemission (VBRP) at Ce 3d-4f and Ce 4d-4f thresholds, a lowering of the 4f hybridization has been recently observed on going from the bulk to the surface layers. We report an extensive VBRP work at both the thresholds (3d and 4d) on three Ce compounds (Ce 7Rh 3, CeRh 2, and CeCo 2). In addition to surface effects, we found different resonance behaviours for f 0 and f 1 configurations. These differences should not be disregarded when extracting the 4f bulk and surface contributions from the photoemission spectra.
Published Version
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