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Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

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MA: Fachverband Magnetismus

MA 61: Caloric Effects

MA 61.7: Talk

Friday, March 20, 2020, 11:00–11:15, HSZ 101

Magnonic Analogue of Edelstein Effect in Antiferromagnetic InsulatorsBo Li1, •Alexander Mook2, Aldo Raeliarijaona1, and Alexey Kovalev11Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA — 2Department of Physics, University of Basel, CH-4056 Basel

The electronic Edelstein or inverse spin-galvanic effect comprises a nonequilibrium spin density as response to a charge current [1]. Herein [2], we investigate the nonequilibrium spin polarization due to a temperature gradient in antiferromagnetic insulators, which is the magnonic analogue of the Edelstein effect.

We derive a linear response theory of a temperature-gradient-induced spin polarization in collinear and noncollinear antiferromagnets and present selected examples in one, two, and three dimensions. Assuming a realistic temperature gradient of 10  K/mm, we find two-dimensional spin densities of up to ∼ 106 ℏ/cm2 [e.g., in the noncollinear kagome antiferromagnet KFe3(OH)6(SO4)2] and three-dimensional bulk spin densities of up to ∼ 1014 ℏ/cm3, encouraging an experimental detection.

[1] A. Aronov and Y. B. Lyanda-Geller, JETP Lett. 50, 431 (1989); V. Edelstein, Solid State Commun. 73, 233 (1990); [2] B. Li, A. Mook, A. Raeliarijaona, A. Kovalev, preprint arXiv:1910.00143

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