Ground State Transitions of Four-Electron Quantum Dots in Zero Magnetic Field

作     者：XIE Wen-Fang 

作者机构：Department of Physics Guangzhou University Guangzhou 510006 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2008年第49卷第3期

页      面：763-766页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China under Grant No.10775035 

主　　题：electron-electron interaction quantum dot semiconductor 

摘      要：In this paper, we study four electrons confined in a parabolic quantum dot in the absence of magnetic field, by the exact diagonalization method. The ground-state electronic structures and orbital and spin angular momenta transitions as a function of the confined strength are investigated. We find that the confinement may cause accidental degeneracies between levels with different low-lying states and the inversion of the energy values. The present results are useful to understand the optical properties and internal electron-electron correlations of quantum dot materials.