Our joint theoretical and computer experimental study of heat-to-spin conversion reveals that noncollinear antiferromagnetic insulators are promising materials for generating magnon spin currents upon application of a temperature gradient: they exhibit spin Seebeck and spin Nernst effects. Using Kubo theory and spin dynamics simulations, we explicitly evaluate these effects in a single kagome sheet of potassium iron jarosite, KFe3(OH)6(SO4)2, and predict a spin Seebeck conversion factor of 0.2μV/K at a temperature of 20K.
@article{arxiv.1903.11896,
title = {Spin Seebeck and Spin Nernst Effects of Magnons in Noncollinear Antiferromagnetic Insulators},
author = {Alexander Mook and Robin R. Neumann and Jürgen Henk and Ingrid Mertig},
journal= {arXiv preprint arXiv:1903.11896},
year = {2019}
}