Odd-parity superconductivity near inversion breaking quantum critical point in one dimension
Superconductivity
2017-06-07 v3 Strongly Correlated Electrons
Abstract
We study how an inversion-breaking quantum critical point affects the ground state of a one-dimensional electronic liquid with repulsive interaction and spin-orbit coupling. We find that regardless of the interaction strength, the critical fluctuations always lead to a gap in the electronic spin-sector. The origin of the gap is a two-particle backscattering process, which becomes relevant due to renormalization of the Luttinger parameter near the critical point. The resulting spin-gapped state is a one-dimensional version of spin triplet superconductivity. Interestingly, in the case of a ferromagnetic critical point the Luttinger parameter is renormalized in the opposite manner, such that the system remains non-superconducting.
Cite
@article{arxiv.1609.09084,
title = {Odd-parity superconductivity near inversion breaking quantum critical point in one dimension},
author = {Jonathan Ruhman and Vladyslav Kozii and Liang Fu},
journal= {arXiv preprint arXiv:1609.09084},
year = {2017}
}