Antiferromagnets with multiple magnetic sublattices host non-Abelian SU(N) gauge fields in magnon bands that prevent Berry curvature cancellation and enable a robust magnon thermal Hall response.
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Classification of magnon thermal Hall systems based on U(1) to non-Abelian gauge fields
Antiferromagnets with multiple magnetic sublattices host non-Abelian SU(N) gauge fields in magnon bands that prevent Berry curvature cancellation and enable a robust magnon thermal Hall response.