Antiferromagnetic insulators can become active spintronics components by controlling and detecting their dynamics via spin currents in adjacent metals. This cross-talk occurs via spin-transfer and spin-pumping, phenomena that have been predicted to be as strong in antiferromagnets as in ferromagnets. Here, we demonstrate that a temperature gradient drives a significant heat flow from magnons in antiferromagnetic insulators to electrons in adjacent normal metals. The same coefficients as in the spin-transfer and spin-pumping processes also determine the thermal conductance. However, in contrast to ferromagnets, the heat is not transferred via a spin Seebeck effect which is absent in antiferromagnetic insulator-normal metal systems. Instead, the heat is transferred via a large staggered spin Seebeck effect.
@article{arxiv.1506.06705,
title = {Heat transport between antiferromagnetic insulators and normal metals},
author = {Arne Brataas and Hans Skarsvåg and Erlend G. Tveten and Eirik Løhaugen Fjærbu},
journal= {arXiv preprint arXiv:1506.06705},
year = {2015}
}