| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Spin pumping through magnetic impurity effect |
| Deng Wei-Yin (邓伟胤)a, Sheng Li (盛利)a b, Xing Ding-Yu (邢定钰)a b |
a National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
b Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China |
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Abstract We propose a simple adiabatic quantum spin pump to generate pure spin current. The spin pump is driven by an ac gate voltage and a time-dependent magnetic impurity potential. It is found that the total pumped spin per cycle exhibits oscillations, whose magnitude decays exponentially with changing strength of the impurity potential. The proposed method may be useful for spintronic applications.
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Received: 10 April 2015
Revised: 08 May 2015
Accepted manuscript online:
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PACS:
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72.25.Pn
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(Current-driven spin pumping)
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73.23.-b
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(Electronic transport in mesoscopic systems)
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75.75.-c
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(Magnetic properties of nanostructures)
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| Fund: Project supported by the State Key Program for Basic Research of China (Grant Nos. 2015CB921202, 2014CB921103, 2011CB922103, and 2010CB923400), the National Natural Science Foundation of China (Grant Nos. 11225420, 11174125, and 91021003), and the Priority Academic Program Development of Higher Education Institutions of Jiangsu Province, China. |
Corresponding Authors:
Sheng Li
E-mail: shengli@nju.edu.cn
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Cite this article:
Deng Wei-Yin (邓伟胤), Sheng Li (盛利), Xing Ding-Yu (邢定钰) Spin pumping through magnetic impurity effect 2015 Chin. Phys. B 24 087202
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