We report unidirectional charge transport in a NbSe2 noncentrosymmetric superconductor, which is exchange-coupled with a CrPS4 van der Waals layered antiferromagnetic insulator. The NbSe2/CrPS4 bilayer device exhibits bias-dependent superconducting critical-current variations of up to 16%, with the magnetochiral anisotropy reaching ∼105T−1A−1. Furthermore, the CrPS4/NbSe2/CrPS4 spin-valve structure exhibits the superconducting diode effect with critical-current variations of up to 40%. We also utilize the magnetic proximity effect to induce switching in the superconducting state of the spin-valve structure. It exhibits an infinite magnetoresistance ratio depending on the field sweep direction and magnetization configuration. Our result demonstrates a novel route for enhancing the nonreciprocal response in the weak external field regime (<50mT) by exploiting the magnetic proximity effect.
@article{arxiv.2111.05627,
title = {Magnetic Proximity-Induced Superconducting Diode Effect and Infinite Magnetoresistance in van der Waals Heterostructure},
author = {Jonginn Yun and Suhan Son and Jeacheol Shin and Giung Park and Kaixuan Zhang and Young Jae Shin and Je-Geun Park and Dohun Kim},
journal= {arXiv preprint arXiv:2111.05627},
year = {2023}
}