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- W2020402135 abstract "We theoretically investigate the electronic energy bands and spin filtering tuned by Rashba spin-orbit coupling (SOC) and magnetic field in two-dimensional superlattices (2DSLs), where the square rods of quantum barriers, matrix, and wells are imposed periodically. It is shown that electronic energy spectra form a band structure and the energy levels are split up by the Rashba SOC. Correspondingly, the electrical conductance presents a “band-gap” structure against the electron energy. With manipulating the strength of SOC, the conductance in the “band” is enhanced for the spin-up electrons, while it is reduced for the spin-down electrons. Interestingly, by introducing a magnetic modulation, conductance curves for spin-up and spin-down electrons are translated in the different directions. As a result, high spin polarization is observed, and fully spin-polarized conductance is achieved in this 2DSL. Furthermore, the electronic wavefunctions have been obtained, which presents a clear picture of spin filtering. Our investigations achieve potential applications in spin quantum devices and spin filters." @default.
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- W2020402135 date "2012-03-14" @default.
- W2020402135 modified "2023-10-18" @default.
- W2020402135 title "Tunable energy bands and spin filtering in two-dimensional superlattices with spin-orbit interaction" @default.
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- W2020402135 doi "https://doi.org/10.1063/1.3684715" @default.
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