Geometrical-confinement effects on two electrons in elliptical quantum dots

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	Geometrical-confinement effects on two electrons in elliptical quantum dots
	Liu YH (Liu Yong-Hui) ; Yang FH (Yang Fu-Hua) ; Feng SL (Feng Song-Lin)
刊名	journal of applied physics
	2007
卷号	101 期号:6 页码:art.no.063714
关键词	MAGNETIC-FIELD
ISSN号	issn: 0021-8979
通讯作者	liu, yh, chinese acad sci, inst semicond, state key lab superlattices & microstruct, pob 912, beijing 100083, peoples r china. 电子邮箱地址: liuyh@red.semi.ac.cn
中文摘要	the effects of the geometrical shape on two electrons confined in a two-dimensional parabolic quantum dot and subjected to an external uniform magnetic field have been calculated using a variational-perturbation method based on a direct construction of trial wave functions. the calculations show that both the energy levels and the spin transition of two electrons in elliptical quantum dots are dramatically influenced by the shape of the dots. the ground states with total spin s=0 and s=1 are affected greatly by changing the magnetic field and the geometrical confinement. the quantum behavior of elliptical quantum dots show some relation to that of laterally coupled quantum dots. for a special geometric configuration of the confinement omega(y)/omega(x)=2.0, we encounter a characteristic magnetic field at which spin singlet-triplet crossover occurs. (c) 2007 american institute of physics.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-03-29
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/9552]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Liu YH ,Yang FH ,Feng SL . Geometrical-confinement effects on two electrons in elliptical quantum dots[J]. journal of applied physics,2007,101(6):art.no.063714.
APA	Liu YH ,Yang FH ,&Feng SL .(2007).Geometrical-confinement effects on two electrons in elliptical quantum dots.journal of applied physics,101(6),art.no.063714.
MLA	Liu YH ,et al."Geometrical-confinement effects on two electrons in elliptical quantum dots".journal of applied physics 101.6(2007):art.no.063714.