Spin filtering implemented through Rashba and weak magnetic modulations
arXiv:0704.3799 · doi:10.1063/1.2767373
Abstract
We present two theoretical schemes for spin filters in one-dimensional semiconductor quantum wires with spatially modulated Rashba spin-orbit coupling (SOC) as well as weak magnetic potential. For case I, the SOC is periodic and the weak magnetic potential is applied uniformly along the wire. Full spin polarizations with opposite signs are obtained within two separated energy intervals. For case II, the weak magnetic potential is periodic while the SOC is uniform. An ideal negative/positive switching effect for spin polarization is realized by tuning the strength of SOC. The roles of SOC, magnetic potential, and their coupling on the spin filtering are analyzed.
4 pages, 4 figures
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Cited by in corpus (4)
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- Effect of gate-driven spin resonance on the conductance of a one-dimensional quantum wire
- Spin Filtering in a Nonuniform Quantum Wire with Rashba Spin-Orbit Interaction
- Spin-filtering and charge- and spin-switching effects in a quantum wire with periodically attached stubs