Photoemission study of valence fluctuation in
- 15 June 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (17) , 8945-8950
- https://doi.org/10.1103/physrevb.35.8945
Abstract
Mixed-valence has been studied by x-ray and ultraviolet photoemission spectroscopy (XPS and UPS). UPS results reveal a bulk divalent (4→4) peak ∼0.3 eV below the Fermi level, and a valence of 2.2 is deduced from XPS. These values are compared with the ground-state magnetic susceptibility, the specific heat, and the magnetic relaxation rate of 4f electrons by using the results of the degenerate impurity Anderson model. The 4f–5d–conduction-band hybridization is suggested to be more important than the 4f–sp–conduction-band hybridization.
Keywords
This publication has 31 references indexed in Scilit:
- Thermodynamic, Transport, and Excitation Properties of Ce Impurities in a Model Metal: Kondo Resonance and Universality in the Mixed-Valent RegimePhysical Review Letters, 1985
- Self-consistent perturbation theory for dynamics of valence fluctuationsZeitschrift für Physik B Condensed Matter, 1984
- Large Fermi-level resonance in the electron-addition spectrum of Ceand CePhysical Review B, 1983
- Correlation effects in the electronic structure and photoemission spectra of mixed-valence cerium compoundsPhysical Review B, 1983
- Electronic structure of Ce and its intermetallic compoundsPhysical Review B, 1983
- Invalidity ofcount determination and possibilities for determination ofhybridization in intermetallics of the light rare earths by core-level spectroscopyPhysical Review B, 1982
- Valence fluctuation phenomenaReports on Progress in Physics, 1981
- Mixed-valence compoundsReviews of Modern Physics, 1976
- Configuration crossover in 4f substances under pressureJournal of Physics and Chemistry of Solids, 1974
- Crystal chemistry of the CeCu2-type structureJournal of the Less Common Metals, 1973