Magnon spin transport around the compensation magnetic field in easy-plane antiferromagnetic insulators

In this work, we theoretically study the magnon spin transport in easy-plane antiferromagnetic insulators presence of an in-plane magnetic field. By exactly calculating spectrum, find band splitting due to anisotropy can be fully compensated by external field at a particular strength, which makes its dynamics nearly equivalent easy-axis antiferromagnet. As result, intrinsic Hall effect dipole-dipole interaction, previously predicted antiferromagnets is activated antiferromagnets. The compensation feature also allows control lifetime and hence diffusion length. robust against biaxial anisotropy.