Ultrahigh-resolution photoemission study of CePd3: Absence of Kondo insulator gap

S. Souma, H. Kumigashira, T. Ito, T. Takahashi, M. Kasaya

Research output: Contribution to journalConference articlepeer-review

Abstract

We have performed ultrahigh-resolution (ΔE = 8 meV) photoemission spectroscopy to examine the possibility of CePd3 being a `Kondo insulator' as suggested by a recent optical measurement. We found that the photoemission spectrum of CePd3 does not show any indication of (pseudo) gap at EF, differing from the well-established temperature-dependent (pseudo) gap in Kondo insulators. The Ce 4f spectrum clearly shows the `Kondo resonance peak' at EF, indicating the intrinsic metallic nature of CePd3. These results strongly suggest that CePd3 is not a Kondo insulator but a conventional Kondo metal as suggested by thermodynamic measurements.

Original languageEnglish
Pages (from-to)735-740
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume114-116
DOIs
Publication statusPublished - 2001 Mar
Event8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA
Duration: 2000 Aug 82000 Aug 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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