Direct observation of a quasiparticle band in CeIrIn5: 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, and Yoshichika Ōnuki
Phys. Rev. B 73, 224517 – Published 20 June 2006
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  • INTRODUCTION
  • EXPERIMENT
  • RESULTS AND DISCUSSION
  • CONCLUSION
  • ACKNOWLEDGEMENTS
    • References

    Abstract

    We have performed a high-resolution angle-resolved Ce 4d−4f resonant photoemission experiment on the heavy fermion superconductor CeIrIn5. We have observed a quasiparticle band, which has an energy dispersion of ∼30meV 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.

    • Figure
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    • Received 20 October 2005

    DOI:https://doi.org/10.1103/PhysRevB.73.224517

    ©2006 American Physical Society

    Authors & Affiliations

    Shin-ichi Fujimori1, Atsushi Fujimori1,2, Kenya Shimada3, Takamasa Narimura4, Kenichi Kobayashi4, Hirofumi Namatame3, Masaki Taniguchi3, Hisatomo Harima5, Hiroaki Shishido6, Shugo Ikeda7, Dai Aoki8, Yoshifumi Tokiwa9, Yoshinori Haga7, and Yoshichika Ōnuki6,7

    • 1Synchrotron Radiation Research Unit, Japan Atomic Energy Agency, SPring-8, Sayo, Hyogo 679-5148, Japan
    • 2Department of Complexity Science and Engineering, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
    • 3Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
    • 4Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
    • 5Department of Physics, Kobe University, Nada, Kobe 657-8501, Japan
    • 6Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
    • 7Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
    • 8Institute for Material Research, Tohoku University, Sendai 980-8578, Japan
    • 9Condensed Matter and Thermal Physics, Los Alamos National Laboratory, MST-10, MS K764, Los Alamos, New Mexico 87545, USA

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    Issue

    Vol. 73, Iss. 22 — 1 June 2006

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