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

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

研究成果: Conference article査読

抄録

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.

本文言語English
ページ(範囲)735-740
ページ数6
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
114-116
DOI
出版ステータスPublished - 2001 3
イベント8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA
継続期間: 2000 8 82000 8 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 分光学
  • 物理化学および理論化学

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