| 磁场作用下的一个含类氢施主杂质二维量子环中的电子能态 |
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| 引用本文： | 康云,王升,李贤丽.磁场作用下的一个含类氢施主杂质二维量子环中的电子能态[J].半导体学报,2015,36(3):032003-7. |
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| 作者姓名： | 康云 王升 李贤丽 |
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| 作者单位： | College of Electronic Science, Northeastern Petroleum University |
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| 基金项目： | 国家自然科学基金;省自然科学基金;省教育厅项目；校青年基金 |
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| 摘 要： | Using the finite element method, we investigate the lowest and first few excited state energies in a twodimensional GaAs quantum ring(QR) with a hydrogenic donor impurity and effective mass approximation under a uniform magnetic field perpendicular to the ring plane. We study in detail the dependence of the energy spectrum with different angular momentum on the inner radius, the outer radius and width of the QR, the magnetic field and impurity position. The results reveal that the electron energies increase with the inner radius while decrease with the outer radius and width of the QR; for a fixed ring, the magnetic field induces the increase of the electron energies. Moreover, the existence of impurity reduces energy levels, and the energy levels depend highly on the impurity position, which decreases as the impurity is far away from the center of the QR. Also, the dependence of the angular momentum on the energy spectrum is analyzed in detail.
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| 关 键 词： | quantum ring hydrogenic donor impurity magnetic field electron energy states |
| 收稿时间： | 8/6/2014 12:00:00 AM |
Electron energy states in a two-dimensional GaAs quantum ring with hydrogenic donor impurity in the presence of magnetic field |
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| Kang Yun,Wang Sheng and Li Xianli.Electron energy states in a two-dimensional GaAs quantum ring with hydrogenic donor impurity in the presence of magnetic field[J].Chinese Journal of Semiconductors,2015,36(3):032003-7. |
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| Authors: | Kang Yun Wang Sheng and Li Xianli |
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| Affiliation: | College of Electronic Science, Northeastern Petroleum University, Daqing 163318, China |
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| Abstract: | Using the finite element method, we investigate the lowest and first few excited state energies in a two-dimensional GaAs quantum ring (QR) with a hydrogenic donor impurity and effective mass approximation under a uniform magnetic field perpendicular to the ring plane. We study in detail the dependence of the energy spectrum with different angular momentum on the inner radius, the outer radius and width of the QR, the magnetic field and impurity position. The results reveal that the electron energies increase with the inner radius while decrease with the outer radius and width of the QR; for a fixed ring, the magnetic field induces the increase of the electron energies. Moreover, the existence of impurity reduces energy levels, and the energy levels depend highly on the impurity position, which decreases as the impurity is far away from the center of the QR. Also, the dependence of the angular momentum on the energy spectrum is analyzed in detail. |
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| Keywords: | quantum ring hydrogenic donor impurity magnetic field electron energy states |
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