The electronic structure of strained ZnO/MgxZn1-xO superlattices and the influence of polarization

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	The electronic structure of strained ZnO/MgxZn1-xO superlattices and the influence of polarization
	Xiong W ; Li SS
刊名	physica e-low-dimensional systems & nanostructures
	2009
卷号	41 期号:3 页码:506-512
关键词	ZnO ZnO/MgxZn1-xO superlattice Electronic structure Polarization
ISSN号	1386-9477
通讯作者	xiong w chinese acad sci inst semicond state key lab superlattices & microstruct pob 912 beijing 100083 peoples r china. e-mail address: wenxiong@semi.ac.cn
中文摘要	based on the effective-mass model, the lower energies of the electron and the hole of zno/mgxzn1-xo superlattices are calculated. because of the mismatch of the lattice constant between the zno well and the mgxzn1-xo barrier, piezoelectric and spontaneous polarization exist in zno/mgxzn1-xo superlattices and a macroscopical internal electric held is found when well width l-w >4 nm and mg concentration x > 0.2. the parameters of zno/mgxzn1-xo superlattices such as lattice constant, band offset, etc. are also proposed. through calculations, we found the internal electric field can change the lowest energies of the electron and hole to 105.4 and 85.1 mev when well width l-w up to 70 angstrom, which will influence the electronic and optical properties of zno/mgxzn1-xo superlattices greatly, while the rashba effect from the internal electric field is so small that it can be neglected. the ground state exciton energies with different mg concentration x are also calculated by variational method, our results are very close to the experimental results when mg concentration x <= 0.3. (c) 2008 elsevier b.v. all rights reserved.
学科主题	半导体物理
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/172111/7379]
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	Xiong W,Li SS. The electronic structure of strained ZnO/MgxZn1-xO superlattices and the influence of polarization[J]. physica e-low-dimensional systems & nanostructures,2009,41(3):506-512.
APA	Xiong W,&Li SS.(2009).The electronic structure of strained ZnO/MgxZn1-xO superlattices and the influence of polarization.physica e-low-dimensional systems & nanostructures,41(3),506-512.
MLA	Xiong W,et al."The electronic structure of strained ZnO/MgxZn1-xO superlattices and the influence of polarization".physica e-low-dimensional systems & nanostructures 41.3(2009):506-512.