Curvilinear One-Dimensional Antiferromagnets
Curvilinear One-Dimensional Antiferromagnets
Pylypovskyi, O.; Kononenko, D. Y.; Yershov, K.; Rößler, U. K.; Tomilo, A.; Faßbender, J.; van den Brink, J.; Makarov, D.; Sheka, D.
Abstract
Antiferromagnets host exotic quasiparticles, support high frequency excitations and are key enablers of the prospective spintronic and spin−orbitronic technologies. Here, we propose a concept of a curvilinear antiferromagnetism where material responses can be tailored by a geometrical curvature without the need to adjust material parameters. We show that an intrinsically achiral one-dimensional (1D) curvilinear antiferromagnet behaves as a chiral helimagnet with geometrically tunable Dzyaloshinskii−Moriya interaction (DMI) and orientation of the Né el vector. The curvature-induced DMI results in the hybridization of spin wave modes and enables a geometrically driven local minimum of the low-frequency branch. This positions curvilinear 1D antiferromagnets as a novel platform for the realization of geometrically tunable chiral antiferromagnets for antiferromagnetic spin−orbitronics and fundamental discoveries in the formation of coherent magnon condensates in the momentum space.
Keywords: antiferromagnetism; curvilinear spin chain; Dzyaloshinskii-Moriya interaction; spin-orbitronics
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Nano Letters 20(2020)11, 8157-8162
DOI: 10.1021/acs.nanolett.0c03246
Cited 35 times in Scopus -
WWW-Beitrag
arXiv:2005.05835 [cond-mat.mes-hall]: https://arxiv.org/abs/2005.05835
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Permalink: https://www.hzdr.de/publications/Publ-31831