de Haas-van Alphen effect of correlated Dirac states in kagome metal Fe₃Sn₂

Creators: Ye, Linda; Chan, Mun K.; McDonald, Ross D.; Graf, David; Kang, Mingu; Liu, Junwei; Suzuki, Takehito; Comin, Riccardo; Fu, Liang; Checkelsky, Joseph G.

Abstract

Primarily considered a medium of geometric frustration, there has been a growing recognition of the kagome network as a harbor of lattice-borne topological electronic phases. In this study we report the observation of magnetoquantum de Haas-van Alphen oscillations of the ferromagnetic kagome lattice metal Fe₃Sn₂. We observe a pair of quasi-two-dimensional Fermi surfaces arising from bulk massive Dirac states and show that these band areas and effective masses are systematically modulated by the rotation of the ferromagnetic moment. Combined with measurements of Berry curvature induced Hall conductivity, our observations suggest that the ferromagnetic Dirac fermions in Fe₃Sn₂ are subject to intrinsic spin-orbit coupling in the d electron sector which is likely of Kane-Mele type. Our results provide insights for spintronic manipulation of magnetic topological electronic states and pathways to realizing further highly correlated topological materials from the lattice perspective.

Copyright and License

© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

Acknowledgement

We are grateful to A. Shekhter and S. Fang for discussions.

Funding

This research was funded in part by the Gordon and Betty Moore Foundation EPiQS Initiative, grant GBMF3848 to J.G.C., and NSF grant DMR-1554891. L.Y. acknowledges support by the Tsinghua Education Foundation. M.K. acknowledges a Samsung Scholarship from the Samsung Foundation of Culture. J.L. acknowledges financial support from the Hong Kong Research Grants Council (Project No. ECS26302118). L.Y., M.K., R.C., L.F., and J.G.C. acknowledge support by the STC Center for Integrated Quantum Materials, NSF grant number DMR-1231319. Pulsed magnetic field measurements at Los Alamos were supported by the U.S. Department of Energy BES "Science at 100T" grant. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1157490 and DMR-1644779, the State of Florida, and the U.S. Department of Energy.

Contributions

L.Y. synthesized the single crystals and performed and analyzed the torque and transport experiments with M.K.C. and R.D.M. (pulsed field) and D.G. and T.S. (DC field). L.Y. and J.L. performed the theoretical modeling. M.K. performed and analyzed the ARPES experiments. L.Y. and J.G.C. wrote the paper with contributions from all authors. R.C., L.F., and J.G.C. supervised the project.

Data Availability

The data that support the findings of this study are available from the corresponding author on reasonable request.

Conflict of Interest

The authors declare no competing interests.

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