Pair-breaking in superconductors with strong spin-orbit coupling
Abstract
We study the influence of symmetry-breaking perturbations on superconductivity in multiorbital materials, with a particular focus on an external magnetic field. We introduce the field-fitness function which characterizes the pair-breaking effects of the perturbation on a given superconducting state. For even parity superconductors we find that this field-fitness function for an external magnetic field is one, implying that the paramagnetic response is controlled only by a generalized effective -factor. For odd parity superconductors, the interplay of the effective -factor and the field-fitness function can lead to counter-intuitive results. We demonstrate this for -wave pairing in the effective electronic states of the Luttinger-Kohn model.
Cite
@article{arxiv.2207.01191,
title = {Pair-breaking in superconductors with strong spin-orbit coupling},
author = {D. C. Cavanagh and Daniel F. Agterberg and P. M. R. Brydon},
journal= {arXiv preprint arXiv:2207.01191},
year = {2024}
}