Repulsive interaction helps superconductivity in fullerides

Satoshi Yamazaki, Yoshio Kuramoto

研究成果: Article査読

2 被引用数 (Scopus)

抄録

A repulsive interaction model of superconductivity (SC) is studied for tight-binding models with three-fold degenerate molecular orbitals. Taking a weak-coupling approach, we derive dimensionless coupling constants for various symmetries of SC pairs. In addition to anisotropic SC pairs, the s-wave (A g) pairing can also be formed. With the purely repulsive interaction, however, the Ag pair is not the most stable in both bcc and fcc lattices. The most stable SC pair for the bcc lattice has the Tg symmetry, which is favored by a strongly nesting Fermi surface. In the fcc lattice, various SC symmetries have comparable coupling strengths. With the electron-phonon interaction combined, it is likely that the Ag pair becomes the most stable.

本文言語English
論文番号054713
ジャーナルjournal of the physical society of japan
82
5
DOI
出版ステータスPublished - 2013 5

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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