Spin Superfluidity in Biaxial Antiferromagnetic Insulators

Abstract

Antiferromagnets may exhibit spin superfluidity since the dipole interaction is weak. We seek to establish that this phenomenon occurs in insulators such as NiO, which is a good spin conductor according to previous studies. We investigate nonlocal spin transport in a planar antiferromagnetic insulator with a weak uniaxial anisotropy. The anisotropy hinders spin superfluidity by creating a substantial threshold that the current must overcome. Nevertheless, we show that applying a high magnetic field removes this obstacle near the spin-flop transition of the antiferromagnet. Importantly, the spin superfluidity can then persist across many micrometers, even in dirty samples.

arXiv comment5.5 pages, 4 figures

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• Electrically controlled long-distance spin transport through an antiferromagnetic insulator
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• Coherent spin-wave transport in an antiferromagnet
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• Spin Insulatronics
• Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3
• Long-Distance Spin Transport Through a Graphene Quantum Hall Antiferromagnet
• Spin Superfluidity in Biaxial Antiferromagnetic Insulators
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• Spin Transport in Thick Insulating Antiferromagnetic Films
• Superfluid spin transport in ferro- and antiferromagnets
• Non-local spin Seebeck effect in the bulk easy-plane antiferromagnet NiO
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• Perspectives on spin hydrodynamics in ferromagnetic materials
• Spin superfluidity in noncollinear antiferromagnets
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• Uniaxial Néel Vector Control in Perovskite Oxide Thin Films by Anisotropic Strain Engineering
• Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators
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• Tuning Spin Transport in a Graphene Antiferromagnetic Insulator
• Large spin-orbit torque in a-plane $\alpha$-Fe${}_2$O${}_3$/Pt bilayers
• Intrinsic Spin Decay Length in Antiferromagnetic Insulator
• Interplay of spin and mass superfluidity in antiferromagnetic spin-1 BEC and bicirculation vortices
• Electronic Manipulation of Magnon Topology by Chirality Injection from Boundaries
• Dissipationless dynamics of spin supersolid states in a spin-1/2 triangular antiferromagnet with impurities
• Superfluid-like spin transport in the dynamic states of easy-axis magnets
• Theory of magnon hydrodynamics in collinear antiferromagnets