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Spin-Polarized Transport through Parallel Double Quantum Dots Coupled to Ferromagnetic Leads |
| HOU Tao;WU Shao-Quan;BI Ai-Hua;YANG Fu-Bin; SUN Wei-Li |
| College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068 |
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| Cite this article: |
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HOU Tao, WU Shao-Quan, BI Ai-Hua et al 2008 Chin. Phys. Lett. 25 2198-2201 |
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Abstract We theoretically study the spin-polarized transport phenomena of the parallel double quantum dots coupled to two ferromagnetic leads by the Anderson Hamiltonian. The Hamiltonian is solved by means of the equation-of-motion
approach. We analyse the transmission probability of this system in both the equilibrium and nonequilibrium cases, and our results reveal that the transport properties show some noticeable characteristics depending upon both the spin-polarized strength p and the value of the magnetic flux Φ. Moreover, in the parallel configuration, the position of the Kondo peak shifts while it remains unchanged for the antiparallel configuration. These effects might have some potential applications in spintronics.
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| Keywords:
72.15.Qm
72.25.-b
73.63.Kv
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Received: 28 March 2008
Published: 31 May 2008
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