Enhanced spin Hall effect by tuning antidot potential: Proposal for a spin filter

Abstract

We propose an efficient spin filter including an antidot fabricated on semiconductor heterostructures with strong spin-orbit interaction. The antidot creates a tunable potential on two-dimensional electron gas in the heterostructures, which may be attractive as well as repulsive. Our idea is based on the enhancement of extrinsic spin Hall effect by resonant scattering when the attractive potential is properly tuned. Numerical studies for three- and four-terminal devices indicate that the efficiency of the spin filter can be more than 50% by tuning the potential to the resonant condition.

11 pages, 10 figures

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Cited by in corpus (9)

• Spin selectivity through time-reversal symmetric helical junctions
• Edge-induced spin polarization in two-dimensional electron gas
• Fluctuations of spin transport through chaotic quantum dots with spin-orbit coupling
• Quantum Dot Spin Filter in Resonant Tunneling and Kondo Regimes
• Generation of spin-polarized current using multi-terminated quantum dot with spin-orbit interaction
• Spin-polarized current separator based on a fork-shaped Rashba nanostructure
• Local spin polarisation of electrons in Rashba semiconductor nanowires: effects of the bound state
• Spin polarization direction switch based on an asymmetrical quantum wire
• Effects of scattering area shape on spin conductance in a four-terminal spin-Hall setup