Jia C. L., and Berakdar J.

We study theoretically the effect of a pure spin current in a quantum wire on magnetic domain walls (DWs). We find that a pure spin current acts on DWs with an effective spin-transfer torque that depends on the mutual DWs separation which results in picosecond magnetization dynamics. Spin-dependent interferences due to spin-current scattering from DWs result in a spin-orbital interaction of the carriers whose strength is determined by the orientations and the spatial separation of DWs. This amounts to an effective dynamical magnetoelectric coupling.

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