Superconducting gap and valence band of Mg 10Ir 19B 16 studied by laser and synchrotron photoemission spectroscopy

Rikiya Yoshida, Hiroyuki Okazaki, Keisuke Iwai, Kengo Noami, Takayuki Muro, Mario Okawa, Kyoko Ishizaka, Shik Shin, Zheng Li, Jianlin Luo, Guo Qing Zheng, Tamio Oguchi, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    We report the results of first photoemission spectroscopy on a newly discovered noncentrosymmetric superconductor Mg 10Ir 19B 16. We measured the valence band structure of Mg 10Ir 19B 16 using soft X-ray photoemission technique and found that the first principal calculation explains our observation well. In the bulk-sensitive laser-excited photoemission study, we observed that the intensity at the Fermi level decreases as we lower the sample temperature, indicative of the opening of superconducting energy gap. Using Dynes' function, we performed fitting analysis on the spectra of superconducting state.

    Original languageEnglish
    Article number034705
    Journaljournal of the physical society of japan
    Volume78
    Issue number3
    DOIs
    Publication statusPublished - 2009 Mar

    Keywords

    • Band calculation
    • Mg Ir B
    • Superconducting energy gap
    • Superconductor without inversion symmetry
    • Synchrotron photoemission spectroscopy
    • Ultrahigh-resolution laser-excited photoemission spectroscopy

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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