Anisotropic exchange splitting of excitons in (001)GaAs/Al0.3Ga0.7As superlattice studied by reflectance difference spectroscopy

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	Anisotropic exchange splitting of excitons in (001)GaAs/Al0.3Ga0.7As superlattice studied by reflectance difference spectroscopy
	Zhou, ZY ; Tang, CG ; Chen, YH ; Wang, ZG
刊名	journal of applied physics
	2008
卷号	104 期号:1 页码:art. no. 013106
关键词	FINE-STRUCTURE QUANTUM-WELLS GAAS/ALAS SUPERLATTICES SEMICONDUCTORS TEMPERATURE HOLE
ISSN号	0021-8979
通讯作者	chen, yh, chinese acad sci, inst semicond, key lab semicond mat sci, pob 912, beijing 100083, peoples r china. 电子邮箱地址: yhchen@red.semi.ac.cn
中文摘要	anisotropic exchange splitting (aes) is induced by the joint effects of the electron-hole exchange interaction and the symmetry reduction in quantum wells and quantum dots. a model has been developed to quantitatively obtain the electron-hole exchange energy and the hole-mixing energy of quantum wells and superlattices. in this model, the aes and the degree of polarization can both be obtained from the reflectance difference spectroscopy. thus the electron-hole exchange energy and the hole-mixing energy can be completely separated and quantitatively deduced. by using this model, a (001)5 nm gaas/7 nm al0.3ga0.7as superlattice sample subjected to [110] uniaxial strains has been investigated in detail. the n=1 heavy-hole (1h1e) exciton can be analyzed by this model. we find that the aes of quantum wells can be linearly tuned by the [110] uniaxial strains. the small uniaxial strains can only influence the hole-mixing interaction of quantum wells, but have almost no contribution to the electron-hole exchange interaction. (c) 2008 american institute of physics.
学科主题	半导体材料
收录类别	SCI
语种	英语
公开日期	2010-03-08
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/6562]
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	Zhou, ZY,Tang, CG,Chen, YH,et al. Anisotropic exchange splitting of excitons in (001)GaAs/Al0.3Ga0.7As superlattice studied by reflectance difference spectroscopy[J]. journal of applied physics,2008,104(1):art. no. 013106.
APA	Zhou, ZY,Tang, CG,Chen, YH,&Wang, ZG.(2008).Anisotropic exchange splitting of excitons in (001)GaAs/Al0.3Ga0.7As superlattice studied by reflectance difference spectroscopy.journal of applied physics,104(1),art. no. 013106.
MLA	Zhou, ZY,et al."Anisotropic exchange splitting of excitons in (001)GaAs/Al0.3Ga0.7As superlattice studied by reflectance difference spectroscopy".journal of applied physics 104.1(2008):art. no. 013106.