Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy
The magnon band topology due to the Dzyaloshinskii–Moriya interaction (DMI) and its relevant topological thermal Hall effect has been extensively studied in kagome lattice magnets. In this theoretical investigation, we report a new mechanism for phase transitions between topological phases of magnon...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ac51a8 |
| _version_ | 1827871229948723200 |
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| author | Fengjun Zhuo Hang Li Aurélien Manchon |
| author_facet | Fengjun Zhuo Hang Li Aurélien Manchon |
| author_sort | Fengjun Zhuo |
| collection | DOAJ |
| description | The magnon band topology due to the Dzyaloshinskii–Moriya interaction (DMI) and its relevant topological thermal Hall effect has been extensively studied in kagome lattice magnets. In this theoretical investigation, we report a new mechanism for phase transitions between topological phases of magnons in kagome ferromagnets by tuning the anisotropic nearest-neighbor ferromagnetic interaction and DMI. Using the linear spin-wave theory, we calculate the Chern number and thermal Hall conductivity of magnons in low temperature regime. We show the magnon band structures and magnonic edge states in each topological phase. From the topological phase diagram, we find a sign reversal of the thermal Hall conductivity upon tuning the modulation factors. We explicitly demonstrate the correspondence of thermal Hall conductivity with the propagation direction of the magnonic edge states. Finally, we discuss candidate materials as experimental realizations of our theoretical model. |
| first_indexed | 2024-03-12T16:07:39Z |
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| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:07:39Z |
| publishDate | 2022-01-01 |
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| series | New Journal of Physics |
| spelling | doaj.art-83fa0f7df08340a3ac4231291c93e79b2023-08-09T14:18:00ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124202303310.1088/1367-2630/ac51a8Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropyFengjun Zhuo0https://orcid.org/0000-0001-9984-6329Hang Li1https://orcid.org/0000-0002-1338-7780Aurélien Manchon2https://orcid.org/0000-0002-4768-293XPhysical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi ArabiaSchool of Physics and Electronics, Henan University , Kaifeng 475004, People’s Republic of ChinaAix-Marseille Université , CNRS, CINAM, Marseille, FranceThe magnon band topology due to the Dzyaloshinskii–Moriya interaction (DMI) and its relevant topological thermal Hall effect has been extensively studied in kagome lattice magnets. In this theoretical investigation, we report a new mechanism for phase transitions between topological phases of magnons in kagome ferromagnets by tuning the anisotropic nearest-neighbor ferromagnetic interaction and DMI. Using the linear spin-wave theory, we calculate the Chern number and thermal Hall conductivity of magnons in low temperature regime. We show the magnon band structures and magnonic edge states in each topological phase. From the topological phase diagram, we find a sign reversal of the thermal Hall conductivity upon tuning the modulation factors. We explicitly demonstrate the correspondence of thermal Hall conductivity with the propagation direction of the magnonic edge states. Finally, we discuss candidate materials as experimental realizations of our theoretical model.https://doi.org/10.1088/1367-2630/ac51a8magnetismtopological materialsthermal Hall effectmagnonskagome latticetopological phase transition |
| spellingShingle | Fengjun Zhuo Hang Li Aurélien Manchon Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy New Journal of Physics magnetism topological materials thermal Hall effect magnons kagome lattice topological phase transition |
| title | Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy |
| title_full | Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy |
| title_fullStr | Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy |
| title_full_unstemmed | Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy |
| title_short | Topological thermal Hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy |
| title_sort | topological thermal hall effect and magnonic edge states in kagome ferromagnets with bond anisotropy |
| topic | magnetism topological materials thermal Hall effect magnons kagome lattice topological phase transition |
| url | https://doi.org/10.1088/1367-2630/ac51a8 |
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