| Magnetotransport through an Aharonov-Bohm ring with parallel double quantum dots coupled to ferromagnetic leads |
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| 引用本文： | 吴绍全,侯涛,赵国平,余万伦. Magnetotransport through an Aharonov-Bohm ring with parallel double quantum dots coupled to ferromagnetic leads[J]. 中国物理 B, 2010, 19(4): 47202-047202. DOI: 10.1088/1674-1056/19/4/047202 |
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| 作者姓名： | 吴绍全 侯涛 赵国平 余万伦 |
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| 作者单位： | College of Physics and Electronic Engineering, Sichuan Normal University,Chengdu 610068, China |
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| 基金项目： | Project supported by the ScientificResearch Fund of the Education Department of Sichuan Province ofChina (Grant No.~2006A069) and Funds for Major Basic ResearchProject of Sichuan Province of China (Grant No.~2006J13-155). |
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| 摘 要： | Using the Keldysh nonequilibrium Green function and equation-of-motiontechnique, this paper studies the magnetotransport through an Aharonov--Bohm (AB) ring withparallel double quantum dots coupled to ferromagnetic leads. It calculatesthe transmission probability in both the equilibrium and the nonequilibriumcase, analyses the conductance and the tunnel magnetoresistance forvarious parameters, and obtains some new results. These results show that thissystem is provided with an excellent spin filtering property, and that a largetunnelling magnetoresistance and a negative tunnelling magnetoresistance can ariseby adjusting relative parameters; these facts indicate that this system is apossible candidate for spin valve transistors, and has importantapplications in spintronics.
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| 关 键 词： | Kondo effect double quantum dots Aharonov-Bohm ring magnetoresistance |
| 收稿时间： | 2009-06-23 |
| 修稿时间： | 2009-08-08 |
Magnetotransport through an Aharonov－Bohm ring with parallel double quantum dots coupled to ferromagnetic leads |
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| Wu Shao-Quan,Hou Tao,Zhao Guo-Ping and Yu Wan-Lun. Magnetotransport through an Aharonov－Bohm ring with parallel double quantum dots coupled to ferromagnetic leads[J]. Chinese Physics B, 2010, 19(4): 47202-047202. DOI: 10.1088/1674-1056/19/4/047202 |
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| Authors: | Wu Shao-Quan Hou Tao Zhao Guo-Ping Yu Wan-Lun |
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| Affiliation: | College of Physics and Electronic Engineering, Sichuan Normal University,Chengdu 610068, China |
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| Abstract: | Using the Keldysh nonequilibrium Green function and equation-of-motiontechnique, this paper studies the magnetotransport through an Aharonov--Bohm (AB) ring withparallel double quantum dots coupled to ferromagnetic leads. It calculatesthe transmission probability in both the equilibrium and the nonequilibriumcase, analyses the conductance and the tunnel magnetoresistance forvarious parameters, and obtains some new results. These results show that thissystem is provided with an excellent spin filtering property, and that a largetunnelling magnetoresistance and a negative tunnelling magnetoresistance can ariseby adjusting relative parameters; these facts indicate that this system is apossible candidate for spin valve transistors, and has importantapplications in spintronics. |
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| Keywords: | Kondo effect double quantum dots Aharonov--Bohm ring magnetoresistance |
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