| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Spin Current Through Triple Quantum Dot in the Presence of Rashba Spin-Orbit Interaction |
LI Jin-Liang, LI Yu-Xian
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| College of Physics, Hebei Normal University, Shijiazhuang 050016 Hebei Advanced Film Laboratory, Hebei Normal University, Shijiazhuang 050016 |
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| Cite this article: |
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LI Jin-Liang, LI Yu-Xian 2010 Chin. Phys. Lett. 27 057202 |
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Abstract A spin device with three normal metal leads via triple quantum dot in the presence of Rashba spin-orbit interaction is proposed, which is free from magnetic field or magnetic material. Using nonequilibrium Green's function technique, we investigate the spin current through the three-quantum-dot device. It is found that the spin current can be affected by the strength of the Rashba spin-orbit interaction, Coulomb interaction, the energy of the quantum dot and the bias voltage of the lead. The periodic oscillation of spin current can be controlled by tuning the Rashba spin-orbit interaction.
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| Keywords:
72.25.-b
73.23.-b
73.50.Bk
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Received: 30 September 2009
Published: 23 April 2010
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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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73.50.Bk
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(General theory, scattering mechanisms)
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