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 journalArticle

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 - Mar 2009

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synchrotrons
photoelectric emission
valence
spectroscopy
lasers
x rays
temperature

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)

Cite this

Superconducting gap and valence band of Mg 10Ir 19B 16 studied by laser and synchrotron photoemission spectroscopy. / Yoshida, Rikiya; Okazaki, Hiroyuki; Iwai, Keisuke; Noami, Kengo; Muro, Takayuki; Okawa, Mario; Ishizaka, Kyoko; Shin, Shik; Li, Zheng; Luo, Jianlin; Zheng, Guo-Qing; Oguchi, Tamio; Hirai, Masaaki; Muraoka, Yuji; Yokoya, Takayoshi.

In: Journal of the Physical Society of Japan, Vol. 78, No. 3, 034705, 03.2009.

Research output: Contribution to journalArticle

Yoshida, R, Okazaki, H, Iwai, K, Noami, K, Muro, T, Okawa, M, Ishizaka, K, Shin, S, Li, Z, Luo, J, Zheng, G-Q, Oguchi, T, Hirai, M, Muraoka, Y & Yokoya, T 2009, 'Superconducting gap and valence band of Mg 10Ir 19B 16 studied by laser and synchrotron photoemission spectroscopy', Journal of the Physical Society of Japan, vol. 78, no. 3, 034705. https://doi.org/10.1143/JPSJ.78.034705
Yoshida, Rikiya ; Okazaki, Hiroyuki ; Iwai, Keisuke ; Noami, Kengo ; Muro, Takayuki ; Okawa, Mario ; Ishizaka, Kyoko ; Shin, Shik ; Li, Zheng ; Luo, Jianlin ; Zheng, Guo-Qing ; Oguchi, Tamio ; Hirai, Masaaki ; Muraoka, Yuji ; Yokoya, Takayoshi. / Superconducting gap and valence band of Mg 10Ir 19B 16 studied by laser and synchrotron photoemission spectroscopy. In: Journal of the Physical Society of Japan. 2009 ; Vol. 78, No. 3.
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AU - Muro, Takayuki

AU - Okawa, Mario

AU - Ishizaka, Kyoko

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