Chiral Split Magnon in Altermagnetic MnTe
Altermagnetism is a newly recognized magnetic class named after the alternating spin polarizations in both real and reciprocal spaces. Like the spin splitting of electronic bands, the magnon bands in altermagnets are predicted to exhibit alternating chiral splitting. In this work, by performing inelastic neutron scattering on α-MnTe, we directly observed the altermagnetic magnon splitting. The lifted degeneracy of magnons is well explained by a symmetric-exchange origin. Further calculation based on the obtained spin-wave model demonstrates the magnons are chiral split as well. In addition, the g-wave magnetism was experimentally identified in MnTe.
Authors
- Shinichiro Asai (ORCID: https://orcid.org/0000-0002-5715-7899)
- Takatsugu Masuda (ORCID: https://orcid.org/0000-0002-5168-1024)
- Zheyuan Liu (ORCID: https://orcid.org/0000-0002-1918-6074)
- Shinichi Itoh (ORCID: https://orcid.org/0000-0002-4646-2580)
- Makoto Ozeki
Institutions
- High Energy Accelerator Research Organization (JP)
- Japan Proton Accelerator Research Complex (JP)
- Institute of Materials Structure Science (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-10-08
- DOI
- https://doi.org/10.1103/physrevlett.133.156702
- Citations
- 87
- Primary Topic
- Magnetic and transport properties of perovskites and related materials
- Type
- article
- Field-Weighted Citation Impact
- 10.26
Funders
- Japan Proton Accelerator Research Complex
- Japan Society for the Promotion of Science