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arXiv · 2011.09102

Spin superfluidity in noncollinear antiferromagnets

Bo Li·Alexey A. Kovalev
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Abstract

We explore the spin superfluid transport in exchange interaction dominated three-sublattice antiferromagnets. The system in the long-wavelength regime is described by an $SO(3)$ invariant field theory. Additional corrections from Dzyaloshinskii-Moriya interactions or anisotropies can break the symmetry; however, the system still approximately holds a $U(1)$-rotation symmetry. Thus, the power-law spatial decay signature of spin superfluidity is identified in a nonlocal-measurement setup where the spin injection is described by the generalized spin-mixing conductance. We suggest iron jarosites as promising material candidates for realizing our proposal.

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Bo Li, Alexey A. Kovalev. 2020-11-18. Spin superfluidity in noncollinear antiferromagnets. https://doi.org/10.1103/physrevb.103.l060406

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