Magnetic competition in topological kagome magnets
Magnetic competition in topological kagome magnets is studied by incorporating the spin–orbit coupling, anisotropic Hund coupling and spin exchange into a tight-binding electron dynamics in the kagome lattice. Using the Bogoliubov variational principle we find the stable phases at zero and finite te...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac433c |
| _version_ | 1797746686860197888 |
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| author | Thanh-Mai Thi Tran Duong-Bo Nguyen Hong-Son Nguyen Minh-Tien Tran |
| author_facet | Thanh-Mai Thi Tran Duong-Bo Nguyen Hong-Son Nguyen Minh-Tien Tran |
| author_sort | Thanh-Mai Thi Tran |
| collection | DOAJ |
| description | Magnetic competition in topological kagome magnets is studied by incorporating the spin–orbit coupling, anisotropic Hund coupling and spin exchange into a tight-binding electron dynamics in the kagome lattice. Using the Bogoliubov variational principle we find the stable phases at zero and finite temperatures. At zero temperature and in the strong Ising-Hund coupling regime, a magnetic tunability from the out-of-plane ferromagnetism to the in-plane antiferromagnetism is achieved through a universal property of the critical in-plane Hund coupling. At low temperature the out-of-plane ferromagnetism is stable until a finite crossing temperature. Above the crossing temperature the in-plane antiferromagnetism is stable, but the magnetization of the out-of-plane ferromagnetism still survives. This suggests a metastable coexistence of these magnetic phases in a finite temperature range. A large anomalous Hall conductance is observed in the Ising-Hund coupling limit. |
| first_indexed | 2024-03-12T15:40:22Z |
| format | Article |
| id | doaj.art-a1a42c25201f4702991b5d6e96158cd0 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:40:22Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-a1a42c25201f4702991b5d6e96158cd02023-08-09T16:00:18ZengIOP PublishingMaterials Research Express2053-15912021-01-0181212610110.1088/2053-1591/ac433cMagnetic competition in topological kagome magnetsThanh-Mai Thi Tran0Duong-Bo Nguyen1Hong-Son Nguyen2Minh-Tien Tran3https://orcid.org/0000-0001-9579-3936Institute of Physics, Vietnam Academy of Science and Technology , Hanoi 10000, VietnamGraduate University of Science and Technology, Vietnam Academy of Science and Technology , Hanoi 10000, VietnamDepartment of Occupational Safety and Health, Trade Union University , Hanoi 10000, VietnamInstitute of Physics, Vietnam Academy of Science and Technology , Hanoi 10000, VietnamMagnetic competition in topological kagome magnets is studied by incorporating the spin–orbit coupling, anisotropic Hund coupling and spin exchange into a tight-binding electron dynamics in the kagome lattice. Using the Bogoliubov variational principle we find the stable phases at zero and finite temperatures. At zero temperature and in the strong Ising-Hund coupling regime, a magnetic tunability from the out-of-plane ferromagnetism to the in-plane antiferromagnetism is achieved through a universal property of the critical in-plane Hund coupling. At low temperature the out-of-plane ferromagnetism is stable until a finite crossing temperature. Above the crossing temperature the in-plane antiferromagnetism is stable, but the magnetization of the out-of-plane ferromagnetism still survives. This suggests a metastable coexistence of these magnetic phases in a finite temperature range. A large anomalous Hall conductance is observed in the Ising-Hund coupling limit.https://doi.org/10.1088/2053-1591/ac433celectron correlationskagome latticemagnetic phase transitiontopological insulator |
| spellingShingle | Thanh-Mai Thi Tran Duong-Bo Nguyen Hong-Son Nguyen Minh-Tien Tran Magnetic competition in topological kagome magnets Materials Research Express electron correlations kagome lattice magnetic phase transition topological insulator |
| title | Magnetic competition in topological kagome magnets |
| title_full | Magnetic competition in topological kagome magnets |
| title_fullStr | Magnetic competition in topological kagome magnets |
| title_full_unstemmed | Magnetic competition in topological kagome magnets |
| title_short | Magnetic competition in topological kagome magnets |
| title_sort | magnetic competition in topological kagome magnets |
| topic | electron correlations kagome lattice magnetic phase transition topological insulator |
| url | https://doi.org/10.1088/2053-1591/ac433c |
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