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arXiv · 1903.11896

Spin Seebeck and Spin Nernst Effects of Magnons in Noncollinear Antiferromagnetic Insulators

Alexander Mook·Robin R. Neumann·Jürgen Henk·Ingrid Mertig
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Abstract

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, KFe$_3$(OH)$_6$(SO$_4$)$_2$, and predict a spin Seebeck conversion factor of $0.2 \mu\mathrm{V}/\mathrm{K}$ at a temperature of $20 \mathrm{K}$.

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Alexander Mook, Robin R. Neumann, Jürgen Henk, Ingrid Mertig. 2019-03-28. Spin Seebeck and Spin Nernst Effects of Magnons in Noncollinear Antiferromagnetic Insulators. https://doi.org/10.1103/physrevb.100.100401

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