| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Photon-assisted and spin-dependent shot noise in magnetic-field tunable ZnSe/Zn1-xMnxSe structures |
| Chun-Lei Li(李春雷)1, Yong Guo(郭永)2,3, Xiao-Ming Wang(王小明)4, Yuan Lv(律原)1 |
1 Laboratory for Micro-sized Functional Materials, College of Elementary Education, Capital Normal University, Beijing 100048, China;
2 Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China;
3 Collaborative Innovation Center of Quantum Matter, Beijing, China;
4 The High School Affiliated to China University of Geosciences, Beijing 100083, China |
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Abstract We have investigated the photon-assisted shot noise properties in the magnetic field tunable heterostructures.} Transport properties of the model structure are strongly dependent on the oscillatory field and the magnetic field. In this structure, electrons can absorb or emit one or multi-photons to reach the quasi-bound state. As a result, the transmission properties are affected considerably by photon-assisted tunneling and these features cause the nontrivial variations in the shot noise and Fano factor. It is found that the shot noise becomes spin-dependent and can be modulated not only by the magnetic field, but also by the oscillatory field. Both the spin-up and spin-down components of the shot noise can be greatly suppressed by the magnetic field, and can also be drastically enhanced by the harmonically driven field. Furthermore, with increasing external magnetic field, it is important to note that the enhanced intensity is decreased, even suppressed. These results suggest another method to suppress the shot noise via modulating the oscillatory field at a diluted-magnetic-semiconductors/semiconductor structure.
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Received: 29 September 2016
Revised: 22 November 2016
Accepted manuscript online:
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PACS:
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73.21.Ac
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(Multilayers)
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72.25.Dc
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(Spin polarized transport in semiconductors)
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73.50.Td
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(Noise processes and phenomena)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11574173), the National Basic Research Program of China (Grant No. 2011CB606405), and the General Program of Science and Technology Development Project of Beijing Municipal Education Commission of China (Grant No. KM201410028021). |
Corresponding Authors:
Chun-Lei Li
E-mail: licl@cnu.edu.cn
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Cite this article:
Chun-Lei Li(李春雷), Yong Guo(郭永), Xiao-Ming Wang(王小明), Yuan Lv(律原) Photon-assisted and spin-dependent shot noise in magnetic-field tunable ZnSe/Zn1-xMnxSe structures 2017 Chin. Phys. B 26 027301
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