Fluctuation-driven superconductivity in Sr2RuO4 from weak repulsive interactions
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We provide results for the leading superconducting instabilities for a model pertaining to Sr2RuO4 obtained within spin-fluctuation mediated superconductivity in the very weak-coupling limit. The theory incorporates spin-orbit coupling (SOC) effects both in the band structure and in the pairing kernel in the form of associated magnetic anisotropies. The leading superconducting phase is found to be d(x2-y2) and a nodal s-wave state. However, the odd-parity helical solution can become leading either for small SOC and Hund's coupling J in the weak U-limit, or in the opposite limit with large SOC and J at larger values of the Hubbard-U. The odd-parity chiral solution is never found to be leading. Finally we discuss the form of the resulting superconducting spectral gaps in the different explored parameter regimes.
Originalsprog | Engelsk |
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Artikelnummer | 2040052 |
Tidsskrift | Modern Physics Letters B |
Vol/bind | 34 |
Udgave nummer | 19-20 |
Antal sider | 9 |
ISSN | 0217-9849 |
DOI | |
Status | Udgivet - 20 jul. 2020 |
ID: 247157628