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- W3200643148 abstract "Thermoelectric modules are a promising approach to energy harvesting and efficient cooling. In addition to the longitudinal Seebeck effect, transverse devices utilizing the anomalous Nernst effect (ANE) have recently attracted interest. For high conversion efficiency, it is required that the material have a large ANE thermoelectric power and low electrical resistance, which lead to the conductivity of the ANE. ANE is usually explained in terms of intrinsic contributions from Berry curvature. Our observations suggest that extrinsic contributions also matter. Studying single-crystal manganese-bismuth (MnBi), we find a high ANE thermopower (∼10 μV/K) under 0.6 T at 80 K, and a transverse thermoelectric conductivity of over 40 A/Km. With insight from theoretical calculations, we attribute this large ANE predominantly to a new advective magnon contribution arising from magnon-electron spin-angular momentum transfer. We propose that introducing a large spin-orbit coupling into ferromagnetic materials may enhance the ANE through the extrinsic contribution of magnons." @default.
- W3200643148 created "2021-09-27" @default.
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- W3200643148 date "2021-11-01" @default.
- W3200643148 modified "2023-10-06" @default.
- W3200643148 title "Large magnon-induced anomalous Nernst conductivity in single-crystal MnBi" @default.
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- W3200643148 doi "https://doi.org/10.1016/j.joule.2021.08.007" @default.
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