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Spin filtering via resonant reflection of relativistic surface states

AuthorsNechaev, I. A.; Krasovskii, E. E.
Issue Date2018
PublisherAmerican Physical Society
CitationPhysical Review B 97(4): 041407(R) (2018)
AbstractA microscopic approach is developed to the scattering of surface states from a nonmagnetic linear defect at a surface with strong spin-orbit interaction. Spin-selective reflection resonances in scattering of Rashba-split surface states by an atomic stripe are theoretically discovered in a proof-of-principle calculation for a model crystal potential. Spin-filtering properties of such linear defects are analyzed within an envelope-function formalism for a perturbed surface based on the Rashba Hamiltonian. The continuous Rashba model is found to be in full accord with the microscopic theory, which reveals the essential physics behind the scattering resonance. The spin-dependent reflection suggests a novel mechanism to manipulate spins on the nanoscale.
Publisher version (URL)https://doi.org/10.1103/PhysRevB.97.041407
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