| Transition of the True Ground State in a Coupled Three—Layer Quantum Dot |
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| 作者姓名： | 张战军 鲍诚光 等 |
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| 作者单位： | [1]WuhanInstituteofPhysicsandMathematics,ChineseAcademyofSciences,Wuhan430071 [2]DepartmentofPhysics,ZhongshanUniversity,Guangzhou510275 |
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| 摘 要： | Low-lying states of a vertically coupled three-layer quantum-dot system are studied.Each layer contains one electron,and the tunnelling of electrons between layers is neglected.Effects of the interlayer separation d and the external magnetic field B are evaluated by numerical calculations.In the strong coupling case (i.e.d is small),as in a single dot,transitions of the angular momentum L of the true ground states occur when B increases, whereas in the weak coupling case the transition does not occur and L remains zero.Furthermore,it is found that the variation of d may also induce the L transition.As a result,a phase diagram of L of the true ground state is given in the d-B plane.
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| 关 键 词： | 半导体 半导体异质结构 三层量子斑点 半导体量子理论 |
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