| Photon-Assisted Conductance Structure for a Quantum Dot |
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| 作者姓名： | 廖文虎 高钦翔 周光辉 |
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| 作者单位： | [1]Department of Physics, Zunyi Normal College, Zunyi 563002 [2]Department of Physics Hunan Normal University, Changsha 410081 [3]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10574042, and the Guizhou Provincial Science and Technology Foundation of China under Grant No 20052088. |
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| 摘 要： | We investigate theoretically the electron transport of a two-level quantum dot irradiated under a weak laser field at low temperatures in the rotating wave approximation. Using the method of the Keldysh equation of motion for nonequilibrium Green function, we examine the conductance for the system with photon polarization perpendicular to the tunnelling current direction. It is demonstrated that by analytic analysing and numerical examples, a feature of conductance peak splitting appears, and the dependence of conductance on the incident laser frequency and self-energy are discussed.
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| 关 键 词： | 光子辅助 电导率 电子结构 量子 |
| 修稿时间： | 2006-09-11 |
Photon-Assisted Conductance Structure for a Quantum Dot |
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| LIAO Wen-Hu,GAO Qin-Xiang,ZHOU Guang-Hui.Photon-Assisted Conductance Structure for a Quantum Dot[J].Chinese Physics Letters,2007,24(1):191-194. |
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| Authors: | LIAO Wen-Hu GAO Qin-Xiang ZHOU Guang-Hui |
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| Institution: | Department of Physics, Zunyi Normal College, Zunyi 563002
Department of Physics, Hunan Normal University, Changsha 410081
International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015 |
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| Abstract: | We investigate theoretically the electron transport of a two-level quantum dot irradiated under a weak laser field at low temperatures in the rotating wave approximation. Using the method of the Keldysh equation of motion for nonequilibrium Green function, we examine the conductance for the system with photon polarization perpendicular to the tunnelling current direction. It is demonstrated that by analytic analysing and numerical examples, a feature of conductance peak splitting appears, and the dependence of conductance on the incident laser frequency and self-energy are discussed. |
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| Keywords: | 73 23 -b 73 21 La 78 67 Hc |
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