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Three-sublattice antiferro-type and ferri-type skyrmion crystals in magnets without the Dzyaloshinskii-Moriya interaction
| Title: | Three-sublattice antiferro-type and ferri-type skyrmion crystals in magnets without the Dzyaloshinskii-Moriya interaction |
| Authors: | Hayami, Satoru Browse this author |
| Issue Date: | 17-Jan-2024 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 109 |
| Issue: | 1 |
| Start Page: | 014415 |
| Publisher DOI: | 10.1103/PhysRevB.109.014415 |
| Abstract: | We numerically investigate the stability of the skyrmion crystals in a system without the DzyaloshinskiiMoriya interaction by focusing on the role of magnetic frustration arising from the multi-sublattice degree of freedom. By analyzing an effective three-sublattice spin model with the antiferromagnetic exchange interaction between different sublattices and the momentum-resolved exchange interaction between the same sublattice based on the simulated annealing, we find that various skyrmion crystal phases with sublattice-dependent skyrmion numbers are stabilized with and without an external magnetic field depending on the model parameters: two ferro-type skyrmion crystal phases with the skyrmion numbers of one and two, two ferri-type skyrmion crystal phases, and one antiferro-type skyrmion crystal phase. Our results indicate that the multi-sublattice degree of freedom brings a further intriguing possibility of inducing exotic skyrmion crystal phases. |
| Rights: | ©2024 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/92263 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 速水 賢
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