open access

https://hdl.handle.net/2115/93772

Zero-field skyrmion, meron, and vortex crystals in centrosymmetric hexagonal magnets

英語

Bond-dependent anisotropic interaction

2022-12-15

Elsevier

Journal of magnetism and magnetic materials

564(Part 1)

170036

We investigate the interaction conditions to stabilize topological spin textures in centrosymmetric magnets without an external magnetic field. By performing the simulated annealing for an effective spin model with the momentum-resolved interaction on a two-dimensional triangular lattice, we find that the competing interactions between the finite -q channel and the uniform (q = 0) channel lead to a zero-field skyrmion crystal with the skyrmion number of +/- 1. Moreover, we obtain a variety of topological spin textures, such as a meron crystal, vortex crystal, and other multiple -Q states with and without a scalar chirality. We especially show that the bond-dependent anisotropic exchange interaction originating from the relativistic spin-orbit coupling plays an important role in inducing such topological spin textures, while the single-ion anisotropy does not.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

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