| Fano versus Kondo Resonances in a Closed Aharonov-Bohm Interferometer Coupled to Ferromagnetic Electrodes |
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| 作者姓名： | 吴绍全 孙威立 |
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| 作者单位： | College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068 |
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| 基金项目： | Supported by the Scientific Research Fund of Education Department of Sichuan Province under Grant No 2006A069, and the Funds for Major Basic Research Project of Sichuan Province under Grant No 2006J13-155. |
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| 摘 要： | 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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| 关 键 词： | 量子干涉 量子光学 量子相干 量子阱 |
| 收稿时间： | 2006-9-4 |
| 修稿时间： | 2006-09-04 |
Fano versus Kondo Resonances in a Closed Aharonov--Bohm Interferometer Coupled to Ferromagnetic Electrodes |
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| WU Shao-Quan,SUN Wei-Li.Fano versus Kondo Resonances in a Closed Aharonov-Bohm Interferometer Coupled to Ferromagnetic Electrodes[J].Chinese Physics Letters,2007,24(4):1054-1057. |
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| Authors: | WU Shao-Quan SUN Wei-Li |
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| Institution: | College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068 |
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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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