| 两电子量子环的磁场效应 |
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| 引用本文： | 解文方. 两电子量子环的磁场效应[J]. 广州大学学报(自然科学版), 2011, 10(1): 12-18 |
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| 作者姓名： | 解文方 |
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| 作者单位： | 广州大学物理与电子工程学院,广东,广州,510006 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant(No.11074055 and 10775035) |
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| 摘 要： | 使用矩阵对角化方法,研究了磁场中两电子量子环自旋单态和三重态的电学和光学性质,发现磁场强度对两电子量子环的能谱和光吸收有强烈的影响.计算结果显示两电子量子环的光吸收系数可以达到107/m,这个结果要比两电子量子点高一个数量级.通过引入磁场和改变量子环半径可以获得较大的吸收系数.
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| 关 键 词： | 电子-电子相互作用 量子环 半导体 |
Magnetic field effects on a two-electron quantum ring |
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| XIE Wen-fang. Magnetic field effects on a two-electron quantum ring[J]. Journal og Guangzhou University:Natural Science Edition, 2011, 10(1): 12-18 |
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| Authors: | XIE Wen-fang |
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| Affiliation: | XIE Wen-fang (School of Physics and Electronic Engineering,Guangzhou University,Guangzhou 510006,China) |
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| Abstract: | In this paper, the electronic and optical properties d a two-electron quantum ring subjected to an external magnetic field are studied by means of the numerical diagonalization of the Hamiltonian matrix for the spin-singlet and the spin-triplet states,respectively. We have found that magnetic field has strong effects on the energy and the optical absorptions of a two-electron quantum ring. The results show that the optical absorption coefficients obtained in a two-electron quantum ring can reach the magnitude of 107/m, which is one order of magnitude higher than that in a two-electron quantum dot. The larger optical absorption coefficients can be obtained by inducing the magnetic field and changing the ring radius. |
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| Keywords: | electron-electron interaction quantum ring semiconductor |
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