The role of spin-orbit coupling for the superconducting state in Sr_2RuO_4
Superconductivity
2009-10-31 v1 Strongly Correlated Electrons
Abstract
The odd-parity spin-triplet Cooper pairing states show a six-fold degeneracy for a quasi-two-dimensional electron system. In this article we show how spin-orbit coupling can lift this degeneracy for Sr_2RuO_4 taking the band structure based on the three relevant t_{2g}-orbitals of the Ru-ions into account. The stabilized state depends on the relative strength of the pairing interaction. We show that under reasonable assumptions the chiral pairing state d(k) = z(k_x +/- i k_y) is favored against the others.
Cite
@article{arxiv.cond-mat/9911325,
title = {The role of spin-orbit coupling for the superconducting state in Sr_2RuO_4},
author = {Kwai-Kong Ng and Manfred Sigrist},
journal= {arXiv preprint arXiv:cond-mat/9911325},
year = {2009}
}
Comments
7 pages, 1 figure, accepted by Europhys. Lett