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Anisotropic spin model and multiple-Q states in cubic systems
| Title: | Anisotropic spin model and multiple-Q states in cubic systems |
| Authors: | Yambe, Ryota Browse this author | | Hayami, Satoru Browse this author |
| Issue Date: | 2023 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 107 |
| Issue: | 17 |
| Start Page: | 174408 |
| Publisher DOI: | 10.1103/PhysRevB.107.174408 |
| Abstract: | Multiple-Q states manifest themselves in a variety of noncollinear and noncoplanar magnetic structures depending on the magnetic interactions and lattice structures. In particular, cubic-lattice systems can host a plethora of multiple-Q states, such as magnetic skyrmion and hedgehog lattices. We here classify momentum-dependent anisotropic exchange interactions in cubic-lattice systems based on magnetic representation analysis. We construct an effective spin model for centrosymmetric cubic space groups, Pm3 over bar m and Pm3 over bar , and noncentrosymmetric ones, P4 over bar 3m, P432, and P23: The former include the symmetric anisotropic exchange interaction, while the latter additionally include the Dzyaloshinskii-Moriya interaction. By performing simulated annealing for the Pm3 over bar model, we demonstrate that the symmetric anisotropic exchange interaction becomes the origin of the multiple-Q states in the ground state. We also analyze the instability toward the multiple-Q states in the presence of the momentum-dependent anisotropic exchange interaction under the Pm3 over bar symmetry in a complementary way. Our results will be a reference for not only exploring unknown multiple-Q states but also understanding the origin of the multiple-Q states observed in both noncentrosymmetric and centrosymmetric cubic magnets like EuPtSi and SrFeO3. |
| Rights: | ©2023 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/90122 |
| 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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