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

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

2006-11-03

arxiv.org/abs/cond-mat/0611071v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures

Scientific paper

10.1103/PhysRevB.74.144302

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.

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