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- W1966472103 abstract "We present several new results, extending our recent proposal of a spin filter based on a tight-binding model for a periodic chain of diamond-like loops [A. Aharony, O. Entin-Wohlman, Y. Tokura, S. Katsumoto, Phys. Rev. B 78 (2008) 125328]. In this filter, the Rashba spin–orbit interaction (which can be tuned by a perpendicular gate voltage) and the Aharonov–Bohm flux (due to a perpendicular magnetic field) combine to select only one propagating ballistic mode. For this mode, the electronic spins are fully polarized along a direction that can be controlled by the electric and magnetic fields and by the electron energy . All the other modes are evanescent. Generalizing the square diamonds into rhombi with arbitrary opening angles, we find that increasing these angles widens the parameter range for efficient filtering. A different gate voltage on the two sides of each rhombus is found to delocalize the electrons for energies on one side of the band center. We also compare our tight-binding model with models which use continuous quantum networks of one-dimensional wires, and find coincidence only when one chooses particular site energies at the nodes of the network." @default.
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- W1966472103 date "2010-01-01" @default.
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- W1966472103 title "Spin filtering due to quantum interference in periodic mesoscopic networks" @default.
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- W1966472103 doi "https://doi.org/10.1016/j.physe.2009.06.061" @default.
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