Effect of f-d Coulomb Correlations and Many-Body Resonance in Intermediate Valence Systems: f- Photoemission
The interpretation of the bimodal structure found in 4f-derived photoemission for both phases γ and α of Ce and its compounds is the subject of a long-standing controversy1,2,3. While the larger binding energy feature is generally related to the position of the f-level Eo the other one closer to the Fermi energy εF has been attributed to an Abrikosov-Suhl type resonance4,5 or the effect of the Coulomb interaction G between f- and itinerant d electrons6,7,8 (Eo+G peak). Recent experiments showing fine structure in this feature have reactived this discussion. While spin-orbit splitting has been invoked as a definitive argument in favor of the many-body resonance9, a fine structure much like the experimental one has been predicted for the Eo+G peak due to much weaker f−d hybridization V10.
KeywordsAnderson Model Coulomb Correlation Intermediate Valence Kondo Regime Kondo Resonance
Unable to display preview. Download preview PDF.
- 1.Proceedings of the 4th Int. Conf. on Valence Fluctuations. J. of Magn. and Magn. Mat. 47:48 (1985).Google Scholar
- 2.Proceedings of the Int. Conf. on Anomalous Rare-Earths and Actinides. J. Magn. Magn. Mat. 63 & 64 (1987).Google Scholar
- 6.S.H. Liu and K.M. Ho, Phys. Rev. B28:4220 (1983).Google Scholar
- 7.P.S. Riseborough in Ref. 1, 271.Google Scholar
- 13.F. Gautier, E. Beaurepaire, J.P. Kappler, G. Krill, Y. Hammoud and J.C. Parlebas, RCP Grenoble, France (1985).Google Scholar
- 15.Z.B. Goldschmidt, in Handbook on the Phys. and Chemistry of Rare- Earths, edited by K.A. Geschneidner and L. Eyring (North- Holland, Amsterdam, 1979), Vol. I, p. 89.Google Scholar