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Abstract
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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.
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