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Fano versus Kondo Resonances in a Closed Aharonov--Bohm Interferometer Coupled to Ferromagnetic Electrodes |
| WU Shao-Quan;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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WU Shao-Quan, SUN Wei-Li 2007 Chin. Phys. Lett. 24 1054-1057 |
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Abstract Using the Keldysh nonequilibrium Green function and equation-of-motion technique, we investigate Fano versus Kondo resonances in a closed Aharonov--Bohm interferometer coupled to ferromagnetic leads and study
their effects on the conductance of this system. The conductance with both parallel and antiparallel lead-polarization alignments is analysed for various values of the magnetic flux. Our results show that this system can provide an excellent spin filtering property, and a large tunnelling magnetoresistance can arise by adjusting the system parameters, which indicates that this system is a possible candidate for spin valve transistors and has important applications in spintronics.
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| Keywords:
72.19.Fk
72.15.Qm
73.23.Ra
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Received: 04 September 2006
Published: 26 March 2007
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