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arXiv · 1907.10567

Intrinsic spin Nernst effect of magnons in a noncollinear antiferromagnet

Bo Li·Shane Sandhoefner·Alexey A. Kovalev
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Abstract

We investigate the intrinsic magnon spin current in a noncollinear antiferromagnetic insulator. We introduce a definition of the magnon spin current in a noncollinear antiferromagnet and find that it is in general non-conserved, but for certain symmetries and spin polarizations the averaged effect of non-conserving terms can vanish. We formulate a general linear response theory for magnons in noncollinear antiferromagnets subject to a temperature gradient and analyze the effect of symmetries on the response tensor. We apply this theory to single-layer potassium iron jarosite KFe$_3$(OH)$_6$(SO$_4$)$_2$ and predict a measurable spin current response.

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Bo Li, Shane Sandhoefner, Alexey A. Kovalev. 2019-07-24. Intrinsic spin Nernst effect of magnons in a noncollinear antiferromagnet. https://doi.org/10.1103/physrevresearch.2.013079

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