| 磁场和带电杂质对2电子量子点的综合效应 |
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| 引用本文： | 李小珠,刘益民,黄钢明.磁场和带电杂质对2电子量子点的综合效应[J].中山大学学报(自然科学版),2010,49(3). |
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| 作者姓名： | 李小珠 刘益民 黄钢明 |
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| 作者单位： | 1. 韶关学院物理系,广东,韶关,512005
2. 中山大学理工学院,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金，波谱与原子分子物理国家重点实验室资助项目 |
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| 摘 要： | 研究了在磁场B中受带电杂质影响的2维2电子量子点的特性。带电杂质被固定在z轴上且与量子点所在的平面的距离为d。 用直接对角化方法获得了2电子量子点的低态能谱，计算了其基态角动量L0和自旋S0随B、d的演化, 归纳结果于(L0,S0)相图中。 (L0,S0)图表明：基态L0和S0跃迁以特殊的方式匹配。
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| 关 键 词： | 量子点 磁场 杂质 基态 |
| 收稿时间： | 2009-05-22; |
The Combined Effect of a Magnetic Field and a Charged Impurity on a 2-Electron Quantum Dot |
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| LI Xiaozhu,LIU Yimin,HUANG Gangming.The Combined Effect of a Magnetic Field and a Charged Impurity on a 2-Electron Quantum Dot[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2010,49(3). |
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| Authors: | LI Xiaozhu LIU Yimin HUANG Gangming |
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| Institution: | （1.Department of Physics, Shaoguan University, Shaoguan 512005,China;2. Physics Science and Engineering Institute, Sun Yat sen University, Guangzhou, 510275， China) |
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| Abstract: | The property of a 2 dimensional 2 electron quantum dot (QD) subjected to an external magnetic field B and affected by a charged impurity is studied. The impurity is located at the z axis by a distance d from the plane of the dot. The energy spectra of low lying state of the QD are obtained by the exact diagonalization approach. The evolution of the angular momentum L0 and the spin S0 of the ground state in accord with B and d has been calculated, the results are summarized and plotted in a (L0,S0) diagram. The (L0,S0) diagram indicates that the transitions of L0 and S0 are matched in peculiar way. |
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| Keywords: | quantum dot magnetic field impurity ground state |
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