Spin Polarization and Andreev Conductance through a Diluted Magnetic Semiconductor Quantum Wire with Spin--Orbit Interaction |
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| Authors: | LI Yu-Xian |
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| Affiliation: | College of Physics, Hebei Normal University, Shijiazhuang 050016Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016 |
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| Abstract: | Spin-dependent Andreev reflection and spin polarization through a diluted magnetic semiconductor quantum wire coupled to normal metallic and superconductor electrodes are investigated using scattering theory. When the spin--orbit coupling is considered, more Andreev conductance steps appear at the same Fermi energy. Magnetic semiconductor quantum wire separates the spin-up and spin-down electrons. The Fermi energy, at which different-spin-state electrons begin to separate, becomes lower due to the effect of the spin--orbit interaction. The spin filter effect can be measured more easily by investigating the Andreev conductance than by investigating the normal conductance. |
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| Keywords: | 72 25 -b 73 23 -b 74 78 Na |
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