| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Spin-Polarized Currents in Double Quantum Dots with Rashba Spin-Orbit Interactions |
| LI Zhen-Shan1, PAN Hui1**, LÜ Rong2 |
1Department of Physics and State Key Laboratory of Software Development Environment, Beihang University, Beijing 100191
2Department of Physics, Tsinghua University, Beijing 100084
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| Cite this article: |
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LI Zhen-Shan, PAN Hui, Lü Rong 2013 Chin. Phys. Lett. 30 087102 |
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Abstract We propose a new scheme of realizing spin-polarized currents in a double quantum dot system. In the presence of Rashba spin-orbit coupling interactions and different Zeeman splittings of each quantum dot, the currents are spin-polarized. The polarization can be controlled by tuning the strength of Rashba spin-orbit coupling and external magnetic fields, which can produce nearly 100% spin-polarized currents. Furthermore, we explain and analyze the mechanism of the strongly spin-polarized currents. Lastly we give two phase diagrams to display our results.
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Received: 24 April 2013
Published: 21 November 2013
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| PACS: |
71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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72.25.Dc
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(Spin polarized transport in semiconductors)
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73.21.La
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(Quantum dots)
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