| Original Articles |
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Spin Polarization and Andreev Conductance through a Diluted Magnetic Semiconductor Quantum Wire with Spin--Orbit Interaction |
| LI Yu-Xian |
| College of Physics, Hebei Normal University, Shijiazhuang 050016Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016 |
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| Cite this article: |
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LI Yu-Xian 2008 Chin. Phys. Lett. 25 3739-3741 |
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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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Received: 08 May 2008
Published: 26 September 2008
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| PACS: |
72.25.-b
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(Spin polarized transport)
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73.23.-b
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(Electronic transport in mesoscopic systems)
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74.78.Na
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(Mesoscopic and nanoscale systems)
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