Abstract
We study the electronic structure of the filled skutterudite CeOs4Sb12 using photoemission spectroscopy (PES). Soft x-ray excited Ce 3d-4f resonant PES confirms the existence of Ce 4f states at the Fermi level (EF). Temperature dependent high-resolution laser-PES spectra reveal a pseudogap formation around EF, which can be explained in terms of the hybridization gap. Simultaneously, a sharp feature is formed just above EF with decreasing temperature. The heavy-fermion-like specific heat is attributed to the occupation of this feature. The results identify the origin of the anomalous coexistence of heavy-fermion and pseudogap behavior in terms of a symmetry dependent hybridization.
Original language | English |
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Article number | 036403 |
Journal | Physical Review Letters |
Volume | 102 |
Issue number | 3 |
DOIs | |
Publication status | Published - Jan 20 2009 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)