3 years ago

Controlling Chiral Domain Walls in Antiferromagnets Using Spin-Wave Helicity.

Arne Brataas, Lars A. Kristiansen, Alireza Qaiumzadeh

In antiferromagnets, the Dzyaloshinskii-Moriya interaction lifts the degeneracy of left- and right-circularly polarized spin waves. This relativistic coupling increases the efficiency of spin-wave-induced domain wall motion and leads to higher drift velocities. We show that in biaxial antiferromagnets, the spin-wave helicity controls both the direction and magnitude of the magnonic force on chiral domain walls. By contrast, in uniaxial antiferromagnets, the magnonic force is propulsive with a helicity dependent strength.

Publisher URL: http://arxiv.org/abs/1705.01572

DOI: arXiv:1705.01572v2

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