Electronic structure of noncentrosymmetric superconductor Li 2(PdxPt1-x)3B studied by photoemission spectroscopy

Rikiya Yoshida, Hiroyuki Okazaki, Mitsutoshi Tajima, Takayuki Muro, Izumi Hase, Kozo Okada, Hiroyuki Takeya, Kazuto Hirata, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journalArticle

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Abstract

We have performed x-ray photoemission spectroscopy on the system of noncentrosymmetric superconductor, Li2(PdxPt 1-x)3B. For Li2Pt3B, we found two major peaks with two other weak components, and the band calculations were in agreement with the observation. The assignment of valence band features using the calculated partial density of states determined that Pt 5d and B 2p contribute to the density of states at the Fermi level. The effect of antisymmetric spin-orbit coupling on the band structure might have been probed, and the analysis on the effect of Pt incorporation into the system indicates the smooth evolution of electronic structures. We presented the measurements of core levels (Pd 3d, Pt 4f, and B 1s) and discussed the chemical bonding states and electronic structures from them.

Original languageEnglish
Article number104701
JournalJournal of the Physical Society of Japan
Volume77
Issue number10
DOIs
Publication statusPublished - Oct 2008

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photoelectric emission
electronic structure
spectroscopy
valence
orbits
x rays

Keywords

  • Band calculation
  • Electronic structure
  • LiPtB
  • Photoemission spectroscopy
  • Superconductor without inversion symmetry

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electronic structure of noncentrosymmetric superconductor Li 2(PdxPt1-x)3B studied by photoemission spectroscopy. / Yoshida, Rikiya; Okazaki, Hiroyuki; Tajima, Mitsutoshi; Muro, Takayuki; Hase, Izumi; Okada, Kozo; Takeya, Hiroyuki; Hirata, Kazuto; Hirai, Masaaki; Muraoka, Yuji; Yokoya, Takayoshi.

In: Journal of the Physical Society of Japan, Vol. 77, No. 10, 104701, 10.2008.

Research output: Contribution to journalArticle

Yoshida, Rikiya ; Okazaki, Hiroyuki ; Tajima, Mitsutoshi ; Muro, Takayuki ; Hase, Izumi ; Okada, Kozo ; Takeya, Hiroyuki ; Hirata, Kazuto ; Hirai, Masaaki ; Muraoka, Yuji ; Yokoya, Takayoshi. / Electronic structure of noncentrosymmetric superconductor Li 2(PdxPt1-x)3B studied by photoemission spectroscopy. In: Journal of the Physical Society of Japan. 2008 ; Vol. 77, No. 10.
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author = "Rikiya Yoshida and Hiroyuki Okazaki and Mitsutoshi Tajima and Takayuki Muro and Izumi Hase and Kozo Okada and Hiroyuki Takeya and Kazuto Hirata and Masaaki Hirai and Yuji Muraoka and Takayoshi Yokoya",
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AU - Yoshida, Rikiya

AU - Okazaki, Hiroyuki

AU - Tajima, Mitsutoshi

AU - Muro, Takayuki

AU - Hase, Izumi

AU - Okada, Kozo

AU - Takeya, Hiroyuki

AU - Hirata, Kazuto

AU - Hirai, Masaaki

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

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AB - We have performed x-ray photoemission spectroscopy on the system of noncentrosymmetric superconductor, Li2(PdxPt 1-x)3B. For Li2Pt3B, we found two major peaks with two other weak components, and the band calculations were in agreement with the observation. The assignment of valence band features using the calculated partial density of states determined that Pt 5d and B 2p contribute to the density of states at the Fermi level. The effect of antisymmetric spin-orbit coupling on the band structure might have been probed, and the analysis on the effect of Pt incorporation into the system indicates the smooth evolution of electronic structures. We presented the measurements of core levels (Pd 3d, Pt 4f, and B 1s) and discussed the chemical bonding states and electronic structures from them.

KW - Band calculation

KW - Electronic structure

KW - LiPtB

KW - Photoemission spectroscopy

KW - Superconductor without inversion symmetry

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