Perfect superconducting diode effect in altermagnets
Superconductivity
2024-08-16 v1 Materials Science
Abstract
We investigate intrinsic superconducting diode effect in the unconventional superconducting state of -wave altermagnets. We find large diode efficiencies in the wide-reaching finite-momentum pairing regimes of the phase diagram. Remarkably, even perfect diode efficiency of 100% can be obtained in the presence of an external magnetic field. We attribute the largest efficiencies to competition between multiple zero-momentum (BCS) and finite-momentum superconducting states, which is connected to a topological nodal-to-nodeless transition in altermagnets with magnetic field, making our results applicable to a wide range of altermagnets.
Cite
@article{arxiv.2408.07747,
title = {Perfect superconducting diode effect in altermagnets},
author = {Debmalya Chakraborty and Annica M. Black-Schaffer},
journal= {arXiv preprint arXiv:2408.07747},
year = {2024}
}
Comments
6 pages, 3 figures