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

doi:10.1143/JPSJ.78.034705

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-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 language	English
Article number	034705
Journal	journal of the physical society of japan
Volume	78
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.78.034705
Publication status	Published - 2009 Mar
Externally published	Yes

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)

Access to Document

10.1143/JPSJ.78.034705

Cite this

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, 78(3), [034705]. https://doi.org/10.1143/JPSJ.78.034705

Yoshida, R, Okazaki, H, Iwai, K, Noami, K, Muro, T, Okawa, M, Ishizaka, K, Shin, S, Li, Z, Luo, J, Zheng, GQ, 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

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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.",

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

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

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AU - Yoshida, Rikiya

AU - Okazaki, Hiroyuki

AU - Iwai, Keisuke

AU - Noami, Kengo

AU - Muro, Takayuki

AU - Okawa, Mario

AU - Ishizaka, Kyoko

AU - Shin, Shik

AU - Li, Zheng

AU - Luo, Jianlin

AU - Zheng, Guo Qing

AU - Oguchi, Tamio

AU - Hirai, Masaaki

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

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KW - Synchrotron photoemission spectroscopy

KW - Ultrahigh-resolution laser-excited photoemission spectroscopy

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