Superconductivity Induced by Interfacial Coupling to Magnons
Mesoscale and Nanoscale Physics
2018-03-07 v1 Superconductivity
Abstract
We consider a thin normal metal sandwiched between two ferromagnetic insulators. At the interfaces, the exchange coupling causes electrons within the metal to interact with magnons in the insulators. This electron-magnon interaction induces electron-electron interactions, which, in turn, can result in p-wave superconductivity. In the weak-coupling limit, we solve the gap equation numerically and estimate the critical temperature. In YIG-Au-YIG trilayers, superconductivity sets in at temperatures somewhere in the interval between 1 and 10 K. EuO-Au-EuO trilayers require a lower temperature, in the range from 0.01 to 1 K.
Cite
@article{arxiv.1707.03754,
title = {Superconductivity Induced by Interfacial Coupling to Magnons},
author = {Niklas Rohling and Eirik Løhaugen Fjærbu and Arne Brataas},
journal= {arXiv preprint arXiv:1707.03754},
year = {2018}
}
Comments
6 pages, 3 figures