Electronic structure and g factors of narrow-gap zinc-blende nanowires and nanorods

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	Electronic structure and g factors of narrow-gap zinc-blende nanowires and nanorods
	Zhang XW (Zhang X. W.) ; Zhu YH (Zhu Y. H.) ; Xia JB (Xia J. B.)
刊名	european physical journal b
	2006
卷号	52 期号:1 页码:133-142
关键词	SEMICONDUCTOR NANORODS EXCITONS INDIUM WIRE INSB
ISSN号	1434-6028
通讯作者	zhang, xw, chinese ctr adv sci & technol, world lab, pob 8730, beijing 100080, peoples r china. e-mail: zhxw99@semi.ac.cn
中文摘要	the hamiltonian in the framework of eight-band effective-mass approximation of the zinc-blende nanowires and nanorods in the presence of external homogeneous magnetic field is given in the cylindrical coordinate. the electronic structure, optical properties, magnetic energy levels, and g factors of the nanowires and nanorods are calculated. it is found that the electron states consist of many hole-state components, due to the coupling of the conduction band and valence band. for the normal bands which are monotone functions of \|k(z)\|, long nanorods can be modeled by the nanowires, the energy levels of the nanorods approximately equal the values of the energy band e(k(z)) of the nanowires with the same radius at a special k(z), where k(z) is the wave vector in the wire direction. due to the coupling of the states, some of the hole energy bands of the nanowires have their highest points at k(z)=0. especially, the highest hole state of the insb nanowires is not at the k(z)=0 point. it is an indirect band gap. for these abnormal bands, nanorods can not be modeled by the nanowires. the energy levels of the nanorods show an interesting plait-like pattern. the linear polarization factor is zero, when the aspect ratio l/2r is smaller than 1, and increases as the length increases. the g(z) and g(x) factors as functions of the k(z), radius r and length l are calculated for the wires and rods, respectively. for the wires, the g(z) of the electron ground state increases, and the g(z) of the hole ground state decreases first, then increases with the k(z) increasing. for the rods, the g(z) and g(x) of the electron ground state decrease as the r or the l increases. the g(x) of the hole ground state decreases, the g(z) of the hole ground state increases with the l increasing. the variation of the g(z) of the wires with the k(z) is in agreement with the variation of the g(z) of the rods with the l.
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/172111/10560]
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	Zhang XW ,Zhu YH ,Xia JB . Electronic structure and g factors of narrow-gap zinc-blende nanowires and nanorods[J]. european physical journal b,2006,52(1):133-142.
APA	Zhang XW ,Zhu YH ,&Xia JB .(2006).Electronic structure and g factors of narrow-gap zinc-blende nanowires and nanorods.european physical journal b,52(1),133-142.
MLA	Zhang XW ,et al."Electronic structure and g factors of narrow-gap zinc-blende nanowires and nanorods".european physical journal b 52.1(2006):133-142.