مشخصات پژوهش

Non‑equilibrium spin‑polarized transport properties of antiferromagnetic stanene nanoribbons are theoretically studied under the combining effect of a normal electric field and linearly polarized irradiation based on the tight‑binding model at room temperature. Due to the existence of spin‑orbit coupling in stanene lattice, applying normal electric field leads to splitting of band degeneracy of spin‑resolved energy levels in conduction and valence bands. Furthermore, unequivalent absorption of the polarized photons at two valleys which is attributed to an antiferromagnetic exchange field results in unequal spin‑polarized photocurrent for spin‑up and spin‑down components. Interestingly, in the presence of band bending which has been induced by edge potentials, an allowable quantum efficiency occurs over a wider wavelength region of the incident light. It is especially important that the variation of an exchange magnetic field generates spin semi‑conducting behavior in the bended band structure. Moreover, it is shown that optical spin‑filtering effect is obtained under the simultaneous effect of uniaxial strain and narrow edge potential.