Spin superfluidity in noncollinear antiferromagnets

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.

8 pages, 2 figures

References in corpus (9)

• Non-collinear Magnetoelectronics
• Superfluid spin transport through antiferromagnetic insulators
• Spin waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2
• Topological Thermal Hall Effect in Frustrated Kagomé Antiferromagnets
• Spin Superfluidity in Biaxial Antiferromagnetic Insulators
• Dzyaloshinskii-Moriya interaction and spin re-orientation transition in the frustrated kagome lattice antiferromagnet
• Spin Hall phenomenology of magnetic dynamics
• Symmetry-broken dissipative exchange flows in thin-film ferromagnets with in-plane anisotropy
• Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators