The Ce 4f electronic structure in CeCo2Ge2: a soft x-ray resonant photoemission investigation
Abstract
Soft x-ray resonant photoemission spectroscopy has been used as a tool to investigate the cerium 4f electronic levels of a single-crystalline sample of CeCo2Ge2. Temperature-dependent angle-integrated and angle-resolved results are discussed. For the lowest investigated temperatures two distinct 4f spectral features are clearly observed close to the Fermi level: the Kondo resonance and its lower lying spin-orbit partner. As the temperature is increased, the intensity of such features evolves consistently with the theoretical predictions of the single-impurity Anderson model. However, the angle-resolved results show momentum-dependent effects that require a modification of the single-impurity theory.
- Publication:
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Journal of Physics Condensed Matter
- Pub Date:
- October 2006
- DOI:
- 10.1088/0953-8984/18/40/008
- Bibcode:
- 2006JPCM...18.9221V