Magnon spin transport around the compensation magnetic field in easy-plane antiferromagnetic insulators
arXiv:2106.02178 · doi:10.1063/5.0054409
Abstract
In this work, we theoretically study the magnon spin transport in easy-plane antiferromagnetic insulators in the presence of an in-plane magnetic field. By exactly calculating the magnon spectrum, we find the band splitting due to the magnetic anisotropy can be fully compensated by the external field at a particular strength, which makes its dynamics nearly equivalent to an easy-axis antiferromagnet. As a result, the intrinsic magnon spin Hall effect due to the dipole-dipole interaction, previously predicted in easy-axis antiferromagnets is activated in easy-plane antiferromagnets. The compensation feature also allows the field control of magnon spin lifetime and hence the spin diffusion length. The compensation feature is robust against the biaxial anisotropy.
8 pages, 3 figures
References in corpus (10)
- Subterahertz spin pumping from an insulating antiferromagnet
- Superfluid spin transport through antiferromagnetic insulators
- Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer
- Magnon transport in quasi-two-dimensional van der Waals antiferromagnets
- Magnon-phonon interactions in magnetic insulators
- Spin Superfluidity in Biaxial Antiferromagnetic Insulators
- Theory of coupled spin-charge transport due to spin-orbit interaction in inhomogeneous two-dimensional electron liquids
- Antiferromagnetic magnon pseudospin: Dynamics and diffusive transport
- Dipolar spin waves in uniaxial easy-axis antiferromagnets: A natural topological nodal-line semimetal
- Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators