Spectral evidence for pseudogap formation in kondo insulators CeRhAs and CeRhSb

H. Kumigashira, T. Sato, T. Yokoya, T. Takahashi, S. Yoshii, M. Kasaya

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

High-resolution photoemission spectroscopy has been performed on CeRhAs and CeRhSb to study the temperature-induced evolution of the “Kondo-insulator” gap. We have observed that a pseudogap opens at EF at low temperatures while it is gradually filled with increasing temperature. The size of the pseudogap is well scaled with the Kondo temperature (TK) of each compound while the temperature evolution is dominated by another characteristic temperature Tcoh (<TK). The results are qualitatively consistent with the theoretical prediction from the Anderson lattice model.

Original languageEnglish
Pages (from-to)1943-1946
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number9
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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