Observation of Topological Hall Effect and Nernst Effect in the Canted Antiferromagnetic Phase of MnBi<sub>2</sub>Te<sub>4</sub>
Abstract In magnetic topological materials, the interplay between magnetism and nontrivial topology gives rise to exotic quantum transport phenomena, including the anomalous Hall effect and anomalous Nernst effect. Here, we report the observation of intrinsic topological Hall and topological Nernst effects below the Néel temperature ( T N = 25 K) in the antiferromagnetic (AFM) topological insulator MnBi 2 Te 4 . The maximum of topological Hall resistivity reaches approximately 9 μΩ⋅cm at 2 K, while the topological Nernst signal attains a peak value of 0.1 μV/K near 10 K. These anomalous transport behaviors originate from the net Berry curvature induced by the non-collinear spin structure in the canted AFM state. Our results suggest a close connection between the topological thermoelectric effect and non-collinear AFM order in AFM topological insulators.
Authors
- Yongkang Luo (ORCID: https://orcid.org/0000-0002-6098-5767)
- Hechang Lei (ORCID: https://orcid.org/0000-0003-0850-8514)
- Junwu Huang
- Zhouliang Wang
- Hanjie Guo (ORCID: https://orcid.org/0000-0001-6203-5557)
- Keqi Xia (ORCID: https://orcid.org/0009-0002-2793-579X)
- Jiancun Zuo (ORCID: https://orcid.org/0000-0001-7975-8559)
- Yuwei Zhang (ORCID: https://orcid.org/0000-0003-3173-5627)
- Haiyang Yang (ORCID: https://orcid.org/0000-0002-9504-3841)
- Yuke Li (ORCID: https://orcid.org/0000-0002-6149-1902)
- Xuefeng Zhang (ORCID: https://orcid.org/0000-0002-4377-5450)
- Shouguo Wang (ORCID: https://orcid.org/0000-0001-8947-0946)
- Jianhui Dai (ORCID: https://orcid.org/0000-0002-9507-2554)
- Shangjie Tian
Institutions
- Anhui University (CN)
- Hangzhou Normal University (CN)
- Songshan Lake Materials Laboratory (CN)
- Huazhong University of Science and Technology (CN)
- Hangzhou Dianzi University (CN)
- Renmin University of China (CN)
Publication Details
- Journal
- Chinese Physics Letters
- Published
- 2025-06-16
- DOI
- https://doi.org/10.1088/0256-307x/42/8/080706
- Citations
- 2
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 2.49