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.
KeywordsTral Reso Argentina Haldane
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