Vertically coupled double quantum dots without tunnelling

被引：1
|
作者：
Zhang, ZJ [1 ]
Li, BW
Bao, CG
机构：
[1] Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China
[2] Zhongshan Univ, Dept Phys, Guangzhou 510275, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2002年 / 324卷 / 1-4期
基金：
中国国家自然科学基金;
关键词：
quantum dots; quantum symmetries; ground state transition;
D O I：
10.1016/S0921-4526(02)01396-0
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Low-lying states of vertically coupled double dots without tunnelling are studied. Three electrons and one electron are contained in the lower and higher dots, respectively. Effect of the interdot separation d and the external magnetic field B are evaluated. The angular momentum L and the spin S of the true ground states are found to jump not only with the variation of B but also with d. To clarify the particle-correlation, density functions are defined to analyze the wave functions. This analysis indicates that the quantum symmetries play very important roles in low-lying states. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：245 / 253
页数：9
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