Superconducting pairing in Sr$_2$RuO$_4$ from weak to intermediate coupling
Abstract
The unconventional superconductivity in SrRuO continues to attract considerable interest. While many measurements can be interpreted on the basis of chiral -wave pairing with intriguing topological character, a number of exceptions hinder an unambiguous verification of such pairing. The pairing mechanism also remains under debate. In this paper, with effects of the sizable spin-orbit coupling accounted for, we reexamine the superconducting instabilities in SrRuO through systematic microscopic analysis within random phase approximation. Our calculations show that the odd-parity -wave pairing is favored in the regime of extremely weak interactions, but that highly anisotropic even-parity pairings become most leading over a broad range of stronger interactions. These results could shed light on the nature of the enigmatic superconductivity in SrRuO.
Cite
@article{arxiv.1710.00010,
title = {Superconducting pairing in Sr$_2$RuO$_4$ from weak to intermediate coupling},
author = {Li-Da Zhang and Wen Huang and Fan Yang and Hong Yao},
journal= {arXiv preprint arXiv:1710.00010},
year = {2018}
}
Comments
5.5 pages + supplemental materials. Minor edits. Published version