Electronic states in InAs quantum spheres and ellipsoids

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	Electronic states in InAs quantum spheres and ellipsoids
	Zhu YH ; Zhang XW ; Xia JB
刊名	physical review b
	2006
卷号	73 期号:16 页码:art.no.165326
关键词	LEVEL STRUCTURE DOTS SEMICONDUCTORS PARAMETERS INSB
ISSN号	1098-0121
通讯作者	zhu, yh, ccast, world lab, pob 8730, beijing 100080, peoples r china.
中文摘要	the eight-band effective-mass hamiltonian of the free-standing narrow-gap inas quantum ellipsoids is developed, and the electron and hole electronic structures as well as optical properties are calculated by using the model. the energies, wave functions and transition probabilities of quantum spheres as functions of the radius of quantum sphere r is presented. it is found that the energy levels do not vary as 1/r-2, which is caused by the coupling between the conduction and valence bands, and by the constant terms correspond to the spin-orbit splitting energy. the blueshifts of hole states depend strongly on the coupling from electron states, so that the order of hole states changes as has been predicted in experiment. the exciton binding energies are calculated, the calculated excitonic gaps as functions of the ground exciton transition energy are in good agreement with the photoluminescence measured spectra in details. finally, the hole energy levels and the linear polarization factors in inas quantum ellipsoids as functions of the aspect ratio are presented. the state 1s(z up arrow)((1/2)) becomes the hole ground state when e is larger than 2.4. the saturation value of the linear polarization factors of the inas long ellipsoids of diameter 2.0 nm is 0.86, in agreement with the experimental results.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-04-11
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/10692]
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	Zhu YH,Zhang XW,Xia JB. Electronic states in InAs quantum spheres and ellipsoids[J]. physical review b,2006,73(16):art.no.165326.
APA	Zhu YH,Zhang XW,&Xia JB.(2006).Electronic states in InAs quantum spheres and ellipsoids.physical review b,73(16),art.no.165326.
MLA	Zhu YH,et al."Electronic states in InAs quantum spheres and ellipsoids".physical review b 73.16(2006):art.no.165326.