Abstract Using the tight-binding model approximation, this paper investigates theoretically spin-dependent quantum transport through an Aharonov--Bohm (AB) interferometer. An external magnetic field is applied to produce the spin-polarization and spin current. The AB interferometer, acting as a spin splitter, separates the opposite spin polarization current. By adjusting the energy and the direction of the magnetic field, large spin-polarized current can be obtained.
Received: 19 January 2008
Revised: 28 January 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10674040) and the
Natural Science Foundation of
Hebei Province, China (Grant No A2007000227).
Cite this article:
Li Yu-Xian(李玉现) Spin-dependent quantum transport through an Aharonov--Bohm structure spin splitter 2008 Chin. Phys. B 17 3058
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