Microscopic characterization of the superconducting gap function in Sn1-x InxTe

T. Nomoto, M. Kawamura, T. Koretsune, R. Arita, T. Machida, T. Hanaguri, M. Kriener, Y. Taguchi, Y. Tokura

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Superconductivity in the doped topological crystalline insulator Sn1-xInxTe is studied by first-principles calculation based on superconducting density functional theory (SCDFT) and tunneling spectroscopy. By considering the spin-orbit coupling and frequency dependence of the screened Coulomb interaction in SCDFT, we succeed in reproducing the critical temperature of Sn1-xInxTe quantitatively, in which the spin-orbit coupling is found to play an essential role. The leading gap function is a conventional s wave with moderate anisotropy in k space, and we find that the subdominant odd-parity instability is significantly weaker than the s-wave instability. We perform tunneling spectroscopy measurement and confirm that the spectrum is consistent with the calculated gap function.

本文言語English
論文番号014505
ジャーナルPhysical Review B
101
1
DOI
出版ステータスPublished - 2020 1 8

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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