Parity-Mixed Superconductivity in Locally Non-centrosymmetric System
Abstract
We study the parity-mixed superconductivity in locally non-centrosymmetric systems. In multilayer systems an inhomogeneous Rashba spin-orbit coupling is induced by the local violation of inversion symmetry. Our previous study revealed that a pair-density wave (PDW) phase, with a sign-modulated order parameter, is stabilized in the spin-singlet multilayer superconductors owing to the spin-orbit coupling. In this letter, we show that the uniform spin-triplet superconductivity emerges through parity mixing in the PDW phase, taking into account a weak interaction in the spin-triplet channel, which was neglected in our previous study. The spin-triplet superconducting phase is nonunitary owing to field-induced parity mixing. The critical magnetic field is markedly increased by the emergence of spin-triplet superconductivity. We calculate the density of states and analyze the signature specific to this phase.
Keywords
Cite
@article{arxiv.1311.4660,
title = {Parity-Mixed Superconductivity in Locally Non-centrosymmetric System},
author = {Tomohiro Yoshida and Manfred Sigrist and Youichi Yanase},
journal= {arXiv preprint arXiv:1311.4660},
year = {2015}
}
Comments
5 pages, 4 figures, accepted for publication in JPSJ