Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet Fe₃Sn
Abstract
The material class of kagome metals has rapidly grown and has been established as a field to explore the interplay between electronic topology and magnetism. In this work, we report a combined theoretical and experimental study of the anomalous Hall effect of the ferromagnetic kagome metal Fe₃Sn. The compound orders magnetically at 725 K and presents an easy-plane anisotropy. Hall measurements in single crystals below room temperature yield an anomalous Hall conductivity σₓᵧ ∼ 500(Ωcm)⁻¹, which is found to depend weakly on temperature. This value is in good agreement with the band-intrinsic contribution obtained by density-functional calculations. Our calculations also yield the correct magnetic anisotropy energy and predict the existence of Weyl nodes near the Fermi energy.
Copyright and License
© 2023 American Physical Society.
Acknowledgement
We thank M. Richter for fruitful discussions, suggestions, and for reading the manuscript.
Funding
We also thank U. Nitzsche for technical assistance. M.P.G. thanks the Alexander von Humboldt-Stiftung for the financial support through equipment grants and renewed research program. M.P.G. was also supported by a grant from UNESCO-TWAS and the Swedish International Development Cooperation Agency (SIDA). The views expressed herein do not necessarily represent those of UNESCO-TWAS, SIDA, or its Board of Governors. J.I.F. would like to acknowledge the support from the Alexander von Humboldt-Stiftung and ANPCyT Grants No. PICT 2018/01509 and No. PICT 2019/00371. L.Y. acknowledges support by the Tsinghua Education Foundation and STC Center for Integrated Quantum Materials, NSF Grant No. DMR-1231319. This work was funded, in part, by the Gordon and Betty Moore Foundation EPiQS Initiative, through Grants No. GBMF3848 and No. GBMF9070 to J.G.C. (material synthesis) and NSF Grant No. DMR-2104964 (material analysis). J.-S.Y. is supported by the National Science and Technology Council (Grant No. MOST 110-2112-M-003-008-MY3) and National Center for Theoretical Sciences in Taiwan. J.v.d.B. acknowledges financial support from the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) via SFB 1143 Project No. A5 and under Germany's Excellence Strategy through the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter ct.qmat (EXC 2147, Project No. 390858490).
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Additional details
- ISSN
- 2469-9969
- Alexander von Humboldt Foundation
- UNESCO
- Agencia Nacional de Promoción Científica y Tecnológica
- PICT 2018/01509
- Agencia Nacional de Promoción Científica y Tecnológica
- PICT 2019/00371
- National Science Foundation
- DMR-1231319
- Gordon and Betty Moore Foundation
- GBMF3848
- Gordon and Betty Moore Foundation
- GBMF9070
- National Science Foundation
- DMR-2104964
- National Science and Technology Council
- MOST 110-2112-M-003-008-MY3
- Deutsche Forschungsgemeinschaft
- SFB 1143, project A5
- Deutsche Forschungsgemeinschaft
- 390858490