Intrinsic Nonlinear Electric Spin Generation in Centrosymmetric Magnets

We propose an intrinsic nonlinear electric spin generation effect, which can dominate in centrosym-metric magnets. We reveal the band geometric origin of this effect and clarify its symmetry characters. As an intrinsic effect, it is determined solely by the material's band structure and represents a material characteristic. Combining our theory with first-principle calculations, we predict sizable nonlinear spin generation in single-layer MnBi2Te4, which can be detected in experiment. Our theory opens a new route for all-electric controlled spintronics in centrosymmetric magnets which reside outside of the current paradigm based on linear spin response.

Automated summary

An intrinsic nonlinear electric spin generation effect dominant in centrosymmetric magnets is proposed, with the band geometric origin and symmetry characters clarified. This effect, determined solely by the material's band structure, represents a material characteristic. Combining theory and calculations, sizable nonlinear spin generation in single-layer MnBi2Te4 is predicted, which can be detected experimentally. This theory opens a new route for all-electric controlled spintronics in centrosymmetric magnets, beyond the current paradigm based on linear spin response.