Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal
Open accessAbstract
Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate, Co 3 Sn 2 S 2, with a quasi-two-dimensional crystal structure consisting of stacked Kagomé lattices. This lattice provides an excellent platform for hosting exotic topological quantum states. We observe a negative magnetoresistance that is consistent with the chiral anomaly expected from the presence of Weyl nodes close to the Fermi level. The anomalous Hall conductivity is robust against both increased temperature and charge conductivity, which corroborates the intrinsic Berry-curvature mechanism in momentum space. Owing to the low carrier density in this material and the significantly enhanced Berry curvature from its band structure, the anomalous Hall conductivity and the anomalous Hall angle simultaneously reach 1130 Ω-1 cm-1 and 20%, respectively, an order of magnitude larger than typical magnetic systems. Combining the Kagomé-lattice structure and the out-of-plane ferromagnetic order of Co 3 Sn 2 S 2, we expect that this material is an excellent candidate for observation of the quantum anomalous Hall state in the two-dimensional limit.
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- Authors
- Liu, E., Sun, Y., Kumar, N., Muechler, L., Sun, A., Jiao, L., Yang, S.-Y., Liu, D., Liang, A., Xu, Q., Kroder, J., Süß, V., Borrmann, H., Shekhar, C., Wang, Z., Xi, C., Wang, W., Schnelle, W., Wirth, S., Chen, Y., Goennenwein, S. T. B., & Felser, C.
- Affiliations
- Chinese Academy of Sciences (CN)
- Max Planck Institute for Chemical Physics of Solids (DE)
- Princeton University (US)
- Max Planck Institute of Microstructure Physics (DE)
- Lawrence Berkeley National Laboratory (US)
- ShanghaiTech University (CN)
- Technische Universität Dresden (DE)
- Corresponding author
- Liu, Enke
- Sun, Yan
- Felser, Claudia
- ORCID
- Venue
- Nature Physics
- Published
- 2018-07-30
- Volume
- 14
- Issue
- 11
- Pages
- 1125-1131
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- PMC
- PMC6217931
- OpenAlex
- W2780561017
- Cited by
- 1,367
- References
- 51
- Citations by year
- 2026: 128 · 2025: 212 · 2024: 204 · 2023: 187 · 2022: 211 · 2021: 193 · 2020: 140 · 2019: 86 · 2018: 6
- FWCI
- 49.14
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature Physics (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Magnetic properties of thin films
- Keywords
- anomalous Hall effect, magnetic Weyl semimetal, Co3Sn2S2, kagome lattice, Berry curvature, chiral anomaly, negative magnetoresistance, anomalous Hall angle, quantum anomalous Hall effect, Weyl fermions, ferromagnetism, topological semimetals, electrical transport
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