Electronic Structures of Few Electrons in a Quantum Dot under Magnetic Fields
Electronic Structures of Few Electrons in a Quantum Dot under Magnetic Fields
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磁场下量子点中少数电子的电子结构
DOI：
10.1143/jjap.36.3924
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发表时间：
1997
影响因子：
1.5
通讯作者：
M. Eto
中科院分区：
文献类型：
--
作者：
M. Eto
本文用精确对角化方法计算了磁场作用下量子点中多体效应对少数电子电子结构的影响。当库仑相互作用与单电子能级间距相当并且磁场不太大时，库仑振荡的峰值位置反映了单电子能级的壳结构，这与实验结果半定量一致[Tarucha等人：物理修订信函77（1996）3613]。在强磁场下，关联效应导致基态跃迁。在塞曼效应的存在下，这些转变可以被观察为峰位置的磁场依赖性的尖点。
The many-body effect on the electronic structures of a few electrons confined in a quantum dot is calculated, under magnetic fields, by the exact diagonalization method. When the Coulomb interaction is comparable to the one-electron level spacings and the magnetic field is not too large, the peak positions of the Coulomb oscillation reflect a shell structure of the one-electron levels, which is in semi-quantitative agreement with experimental results [Tarucha et al.: Phys. Rev. Lett. 77 (1996) 3613]. Under strong magnetic fields, the correlation effect results in transitions of the ground state. These transitions can be observed as cusps of the magnetic-field dependence of the peak positions, in the presence of the Zeeman effect.