Superconductivity at metal-antiferromagnetic insulator interfaces
Mesoscale and Nanoscale Physics
2019-10-01 v1
Abstract
Magnons in antiferromagnetic insulators couple strongly to conduction electrons in adjacent metals. We show that this interfacial tie can lead to superconductivity in a tri-layer consisting of a metal sandwiched between two antiferromagnetic insulators. The critical temperature is closely related to the magnon gap, which can be in the THz range. We estimate the critical temperature in MnF-Au-MnF to be on the order of 1 K. The Umklapp scattering at metal-antiferromagnet interfaces leads to a d-wave superconductive pairing, in contrast to the p-wave superconductivity mediated by magnons in ferromagnets.
Cite
@article{arxiv.1904.00233,
title = {Superconductivity at metal-antiferromagnetic insulator interfaces},
author = {Eirik Løhaugen Fjærbu and Niklas Rohling and Arne Brataas},
journal= {arXiv preprint arXiv:1904.00233},
year = {2019}
}
Comments
8 pages, 6 figures