Spin-polarized quantum transport through a T-shape quantum dot-array: a model of spin splitter

Abstract

We in this paper study theoretically the spin-polarized quantum transport through a T-shape quantum dot-array by means of transfer-matrix method along with the Green^{,}s function technique. Multi-magnetic fields are used to produce the spin-polarized transmission probabilities and therefore the spin currents, which are shown to be tunable in a wide range by adjusting the energy, and the direction-angle of magnetic fields as well. Particularly the opposite- spin- polarization currents separately flowing out to two electrodes can be generated and thus the system acts as a spin splitter.

8 pages, 8 figures

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• Resonant Spectrum Analysis of the Conductance of Open Quantum System and Three Types of Fano Parameter
• Aharonov-Bohm ring with a side-coupled atomic cluster: magneto-transport and the selective switching effect
• Flux driven and geometry controlled spin filtering for arbitrary spins in aperiodic quantum networks
• Spin filter for arbitrary spins by substrate engineering