Magnetization orientation-dependent Shubnikov-de Haas oscillations in ferromagnetic Weyl semimetal Co3Sn2S2
We report a study of Shubnikov–de Haas oscillations in high-quality single crystals of ferromagnetic Weyl semimetal Co3Sn2S2. The Fermi surfaces resolved in our experiments are three-dimensional and reflect an underlying trigonal crystallographic symmetry. Combined with density functional calculations, we identify that multiple Fermi surfaces in the system—of both electron and hole nature—arise from the energy dispersion of the (spin-orbit gapped) mirror-protected nodal rings. We observe an evolution of the Fermi surfaces with in-plane magnetic fields, in contrast to field perpendicular to the kagome lattice planes, which has little effect. Viewed alongside the easy-axis anisotropy of the system, our observation reveals an evolution of the electronic structure of Co3Sn2S2—including the Weyl points—with the ferromagnetic moment orientation. Through the case study of Co3Sn2S2, our results provide concrete experimental evidence of an anisotropic interplay via spin-orbit coupling between the magnetic degrees of freedom and electronic band singularities, which has long been expected in semimetallic and metallic magnetic systems.
Authors
- Jhih-Shih You (ORCID: https://orcid.org/0000-0002-5089-4634)
- Manuel Richter (ORCID: https://orcid.org/0000-0002-9999-8290)
- Linda Ye (ORCID: https://orcid.org/0000-0001-7949-1356)
- Madhav Prasad Ghimire (ORCID: https://orcid.org/0000-0003-2783-4008)
- M. K. Chan (ORCID: https://orcid.org/0000-0002-8808-9040)
- D. A. Bell
- Jorge I. Facio
- Jeroen van den Brink
- Joseph G. Checkelsky
Institutions
- National Taiwan Normal University (TW)
- Harvard University (US)
- Tribhuvan University (NP)
- Leibniz Institute for Solid State and Materials Research (DE)
- Complexity, Topology and Dynamics in Quantum Matter (DE)
- National High Magnetic Field Laboratory (US)
- NanoScale Corporation (United States) (US)
- Massachusetts Institute of Technology (US)
- Technische Universität Dresden (DE)
Publication Details
- Journal
- npj Quantum Materials
- Published
- 2026-01-12
- DOI
- https://doi.org/10.1038/s41535-025-00844-6
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- U.S. Department of Energy
- Gordon and Betty Moore Foundation
- National Center for Theoretical Sciences
- National High Magnetic Field Laboratory
- University Grants Commission
- Deutsche Forschungsgemeinschaft
- Ministry of Education, India
- National Taiwan Normal University
- University Grants Commission- Nepal
- National Science and Technology Council
- Office of Naval Research
- Division of Materials Research
- High Magnetic Field Laboratory, Chinese Academy of Sciences
- Army Research Office
- Los Alamos National Laboratory