Direct observation of a quasiparticle band in CeIr In5: An angle-resolved photoemission spectroscopy study

Shin Ichi Fujimori, Atsushi Fujimori, Kenya Shimada, Takamasa Narimura, Kenichi Kobayashi, Hirofumi Namatame, Masaki Taniguchi, Hisatomo Harima, Hiroaki Shishido, Shugo Ikeda, Dai Aoki, Yoshifumi Tokiwa, Yoshinori Haga, Yoshichika Onuki

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Abstract

We have performed a high-resolution angle-resolved Ce 4d-4f resonant photoemission experiment on the heavy fermion superconductor CeIr In5. We have observed a quasiparticle band, which has an energy dispersion of ∼30 meV in the Ce 4f on-resonance spectra. The result suggests that although the 4f spectra are dominated by the localized and/or correlated character, the small itinerant component is responsible for the superconductivity in this compound.

Original languageEnglish
Article number224517
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number22
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Fujimori, S. I., Fujimori, A., Shimada, K., Narimura, T., Kobayashi, K., Namatame, H., Taniguchi, M., Harima, H., Shishido, H., Ikeda, S., Aoki, D., Tokiwa, Y., Haga, Y., & Onuki, Y. (2006). Direct observation of a quasiparticle band in CeIr In5: An angle-resolved photoemission spectroscopy study. Physical Review B - Condensed Matter and Materials Physics, 73(22), [224517]. https://doi.org/10.1103/PhysRevB.73.224517