Magnon excitations in antiferromagnetic materials and their physical implications have helped to facilitate the emergence of device concepts not presently available in ferromagnets. A unique characteristic of antiferromagnetic magnons is the coexistence of opposite spin polarization, which mimics the electron spin in a variety of transport phenomena. Among them, the most prominent spin-contrasting phenomenon is the magnon spin Nernst effect (SNE), which refers to the generation of a transverse pure magnon spin current through a longitudinal temperature gradient. We introduce selected recent progress in the study of magnon SNE in collinear antiferromagnets with focus on its underlying physical mechanism entailing profound topological features of magnon band structures. By reviewing how the magnon SNE has inspired and enriched the exploration of topological magnons, we offer our perspective on this emerging frontier that holds potential in future spintronic nano-technology.
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28 February 2022
Perspective|
March 04 2022
A perspective on magnon spin Nernst effect in antiferromagnets
Hantao Zhang
;
Hantao Zhang
a)
1
Department of Electrical and Computer Engineering, University of California
, Riverside, California 92521, USA
a)Author to whom correspondence should be addressed: [email protected]
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Ran Cheng
Ran Cheng
1
Department of Electrical and Computer Engineering, University of California
, Riverside, California 92521, USA
2
Department of Physics and Astronomy, University of California
, Riverside, California 92521, USA
Search for other works by this author on:
a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 120, 090502 (2022)
Article history
Received:
January 05 2022
Accepted:
February 17 2022
Citation
Hantao Zhang, Ran Cheng; A perspective on magnon spin Nernst effect in antiferromagnets. Appl. Phys. Lett. 28 February 2022; 120 (9): 090502. https://doi.org/10.1063/5.0084359
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