Hybridized Nature of Pseudogap in Kondo Insulators CeRhSb and CeRhAs

Journal Article · Mon Aug 06 04:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.067206· OSTI ID:40277382

Kumigashira, H; Takahashi, T; Yoshii, S; Kasaya, M

We studied the electronic structure of Kondo insulators CeRhSb and CeRhAs using high-resolution photoemission spectroscopy. We found that the 4f -derived density of states shows a depletion (pseudogap) at E{sub F} in contrast to metallic Kondo materials. It was found that the size of the f pseudogap is smaller than that of conduction electrons (c pseudogap) while both scale well with the Kondo temperature. The present results indicate that the hybridization between 4f and conduction electrons near E{sub F} is essential for the Kondo gap in the Ce-based compounds.

• Sponsoring Organization: (US)
• OSTI ID: 40277382
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 87; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONIC STRUCTURE
ELECTRONS
HYBRIDIZATION
PHOTOEMISSION
SPECTROSCOPY