We study theoretically the spin-polarized electron transport properties for a weak Rashba spin-orbit coupling (SOC) quantum wire connected nonadiabatically to two normal-conductor electrode leads. The influence of both the mode mixing due to wire-lead connection and Rashba SOC split on the spin-polarized electron transport is treated simultaneously by means of scattering matrix within the framework of effective free-electron approximation. The analytical analysis with numerical examples demonstrates that the purely spin-polarized current can occur for the system with an appropriate system geometry and material parameters. Our result may imply a simple approach to the design of a spin filter device without containing any magnetic materials or applying a magnetic field. (c) 2007 American Institute of Physics.
部门归属
ccast, world lab, beijing 100080, peoples r china. hunan normal univ, dept phys, changsha 410081, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;zhou, gh (reprint author), ccast, world lab, pob 8730, beijing 100080, peoples r china;ghzhou@hunnu.edu.cn
G. H. Liu,G. H. Zhou. A possible realization of spin filter using a quantum wire with Rashba spin-orbit coupling[J]. Journal of Applied Physics,2007,101(6).
APA
G. H. Liu,&G. H. Zhou.(2007).A possible realization of spin filter using a quantum wire with Rashba spin-orbit coupling.Journal of Applied Physics,101(6).
MLA
G. H. Liu,et al."A possible realization of spin filter using a quantum wire with Rashba spin-orbit coupling".Journal of Applied Physics 101.6(2007).
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