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Fermi Surface Variation of Ce 4f-electrons in Hybridization Controlled Heavy-Fermion Systems
- Source :
- Soid State Commun. 209-210, 45 (2015)
- Publication Year :
- 2009
-
Abstract
- Ce 3d-4f resonant angle-resolved photoemission measurements on CeCoGe$_{1.2}$Si$_{0.8}$ and CeCoSi$_{2}$ have been performed to understand the Fermi surface topology as a function of hybridization strength between Ce 4$f$- and conduction electrons in heavy-fermion systems. We directly observe that the hole-like Ce 4$f$-Fermi surfaces of CeCoSi$_{2}$ is smaller than that of CeCoGe$_{1.2}$Si$_{0.8}$, indicating the evolution of the Ce 4$f$-Fermi surface with the increase of the hybridization strength. In comparision with LDA calculation, the Fermi surface variation cannot be understood even though the overall electronic structure are roughly explained, indicating the importance of strong correlation effects. We also discuss the relation between the Ce 4$f$-Fermi surface variation and the Kondo peaks.<br />Comment: 7 pages, 3 figures, submitted
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Soid State Commun. 209-210, 45 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.0904.1008
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.ssc.2015.03.005