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arXiv · 2507.10246

Electric-Field Induced Spin Wave Nonreciprocity in Noncoplanar Magnets

Xiao-Hui Li·Yuan-Ming Lu·Yuan Wan
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Abstract

We show that an electric field can induce nonreciprocal spin wave dispersion in magnetic insulators with negligible spin-orbit coupling. The electric field controls the direction and magnitude of nonreciprocity through a nonlinear magnetoelectric effect without switching the magnetic ground state. By deriving spin space group symmetry constraints, we find only a subset of noncoplanar magnets exhibits this property, and identify a few candidates. For the example of hexagonal lattice tetrahedral antiferromagnet, our effective field theory analysis and microscopic model calculation yield results that are fully consistent with the symmetry analysis.

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Xiao-Hui Li, Yuan-Ming Lu, Yuan Wan. 2025-07-14. Electric-Field Induced Spin Wave Nonreciprocity in Noncoplanar Magnets. https://arxiv.org/abs/2507.10246

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