We theoretically investigate domain wall motion in an antiferromagnetic insulator layer caused by thermally generated spin currents in an adjacent spin-split superconductor layer. An uncompensated antiferromagnet interface enables the two crucial ingredients underlying the mechanism - spin splitting in the superconductor and absorption of spin currents by the antiferromagnet. Treating the superconductor using the quasiclassical theory and the antiferromagnet via Landau-Lifshitz-Gilbert description, we find domain wall propagation along the thermal gradient with relatively large velocities ∼100 m/s. Our proposal exploits the giant thermal response of spin-split superconductors in achieving large spin torques towards driving domain wall and other spin textures in antiferromagnets.
@article{arxiv.2012.07405,
title = {Thermally induced spin torque and domain wall motion in superconductor/antiferromagnetic insulator bilayers},
author = {G. A. Bobkov and I. V. Bobkova and A. M. Bobkov and Akashdeep Kamra},
journal= {arXiv preprint arXiv:2012.07405},
year = {2021}
}