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arXiv · 2408.16490

Chiral-Split Magnon in Altermagnetic MnTe

Zheyuan Liu·Makoto Ozeki·Shinichiro Asai·Shinichi Itoh·Takatsugu Masuda
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Abstract

Altermagnetism is a newly discovered 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 $\alpha$-MnTe, we directly verified the chiral splitting in altermagnetic magnon dispersions. The lifted degeneracy of chirality is further explained by a symmetric-exchange origin. In addition, the $g$-wave magnetism was identified in MnTe.

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Zheyuan Liu, Makoto Ozeki, Shinichiro Asai, Shinichi Itoh, Takatsugu Masuda. 2024-08-29. Chiral-Split Magnon in Altermagnetic MnTe. https://doi.org/10.1103/physrevlett.133.156702

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