Current-induced torques in nanoscale Weyl semimetals with magnetic textures

Manipulation of magnetization has been one of the primary objectives in the field of spintronics. Magnetic Weyl semimetals can be an interesting platform to reach this objective by using transport currents due to their underlying band geometry and topology. In this work, we consider disk-shaped Weyl semimetals with inhomogeneous magnetization, subject to transport current flow. We show that the transport current produces an axial magnetization current due to orbital magnetic moments of the Weyl electrons. Combined with the pseudomagnetic fields produced by the magnetic texture, the axial current can generate a torque acting on the localized magnetic moments. For the case of magnetic vortices, the pseudomagnetic field arising from the inhomogeneous magnetization can be used to produce current-induced torque on the boundary of a vortex, which could reverse its circulation.