Magnetization orientation-dependent Shubnikov-de Haas oscillations in ferromagnetic Weyl semimetal Co3Sn2S2
Year: 2026
Type: article
Abstract: We report a study of Shubnikov–de Haas oscillations in high-quality single crystals of ferromagnetic Weyl semimetal Co 3 Sn 2 S 2 . 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 Co 3 Sn 2 S 2 —including the Weyl points—with the ferromagnetic moment orientation. Through the case study of Co 3 Sn 2 S 2 , 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.
Source: npj Quantum Materials
Institutions: Massachusetts Institute of Technology, Leibniz Institute for Solid State and Materials Research, Tribhuvan University, Los Alamos National Laboratory, National High Magnetic Field Laboratory, National Taiwan Normal University, Harvard University, Dresden Center for Computational Materials Science, Technische Universität Dresden, Complexity, Topology and Dynamics in Quantum Matter
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,890
Funders: National Science and Technology Council, National Science Foundation, U.S. Department of Energy, Gordon and Betty Moore Foundation, Alexander von Humboldt-Stiftung, 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
Awards: G1138554163, G1696679194, National High Magnetic Field Laboratory Renewal 2018-2022, G2294341347, G2386482098, G354028113, G3560959519, Joseph Checkelsky Materials Synthesis Investigator, G410635398, G4624992917, G502626589, National High Magnetic Field Laboratory Renewal 2013-2017, G6010147111, G657448715, G7214215584, G7452299184, G7902011987, G8876996369, G936330020
OpenAlex ID: W7122785879