Tetrahedral triple-Q magnetic ordering and large spontaneous hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2
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Date
2023-12-15
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Nature
Abstract
The triangular lattice antiferromagnet (TLAF) has been the standard paradigm of frustrated magnetism for several decades. The most common magnetic ordering in insulating TLAFs is the 120° structure. However, a new triple-Q chiral ordering can emerge in metallic TLAFs, representing the short wavelength limit of magnetic skyrmion crystals. We report the metallic TLAF Co1/3TaS2 as the first example of tetrahedral triple-Q magnetic ordering with the associated topological Hall effect (non-zero σxy(H = 0)). We also present a theoretical framework that describes the emergence of this magnetic ground state, which is further supported by the electronic structure measured by angle-resolved photoemission spectroscopy. Additionally, our measurements of the inelastic neutron scattering cross section are consistent with the calculated dynamical structure factor of the tetrahedral triple-Q state. © 2024 Springer Nature Limited.
Description
We acknowledge S. H. Lee, S. S. Lee, Y. Noda, and M. Mostovoy for their helpful discussions and M. Kenzelmann for his help with the experiments at SINQ. The Samsung Science & Technology Foundation supported this work (Grant No. SSTF-BA2101-05). The neutron scattering experiment at the Japan Proton Accelerator Research Complex (J-PARC) was performed under the user program (Proposal No. 2021B0049). One of the authors (J.-G.P.) is partly funded by the Leading Researcher Program of the National Research Foundation of Korea (Grant No. 2020R1A3B2079375). This work is based on experiments performed at the Swiss spallation neutron source SINQ, Paul Scherrer Institute, Villigen, Switzerland. C.D.B. acknowledges support from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DE-SC0022311.
Keywords
Antiferromagnetism, Electric conductivity, Magnetism, Crystals, Spectroscopy, Neutron diffraction, Crystal lattices, Wavelengths
Citation
Park, P., Cho, W., Kim, C., An, Y., Kang, Y.-G., Avdeev, M., Sibille, R., Iida, K., Kajimoto, R., Lee, K. H., Ju, W., Cho, E.-J., Noh, H.-J., Han, M. J., Zhang, S.-S., Batista, C. D., & Park, J.-G. (2023). Tetrahedral triple-Q magnetic ordering and large spontaneous hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2. Nature Communications, 14(1), 8346. doi:10.1038/s41467-023-43853-4