https://doi.org/10.1140/epjb/s10051-024-00772-7
Regular Article - Solid State and Materials
Spin photo-currents in antiferromagnets with Dzyaloshinskii–Moriya interactions
1
Department of Physics, Shaoxing University, 312000, Shaoxing, People’s Republic of China
2
Key Laboratory for Advanced Microstructure Materials of the Ministry of Education and Department of Physics, Tongji University, 200092, Shanghai, People’s Republic of China
Received:
16
April
2024
Accepted:
23
August
2024
Published online:
10
September
2024
We theoretically investigate spin photo-currents in two types of antiferromagnetic insulators with Dzyaloshinskii–Moriya (DM) interactions: one with staggered DM interactions and the other with uniform DM interactions. The magnon spectrum for each system thus becomes asymmetric with respect to the propagation direction of magnons, which may be utilized to enhance the nonlinear spin conductivity. Indeed, we show that the spin conductivity in each system could be up to the order of 10 nJ/(
) when the system is coupled to an AC magnetic field transverse to the ordered spins. Due to the special magnon dispersion, however, an extra static field is required to achieve a high conductivity in the system with staggered DM interactions. The results could be useful in opto-spintronics based on magnetic excitations.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
