Spin polarization and charge transmission for a waveguide on surface of topological insulator

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	Spin polarization and charge transmission for a waveguide on surface of topological insulator
	H. H. Shao; X. Y. Zhou; Y. Li; G. H. Liu; G. H. Zhou
	2011
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	99 期号:15
摘要	We study the spatial distribution of spin polarization and charge transmission for a T-shaped waveguide formed by gate electrodes on the surface of three-dimensional (3D) topological insulator (TI). We demonstrate that an energy gap depending on waveguide geometry parameters is opened and the spin surface-locking is broken by the electrical confinement on the surface of 3D TI. Using continuous condition for the wavefunctions at boundaries between different regions to determine the scattering coefficients, we find that the waveguide can provide an in-plane spin-polarized electron output. This interesting finding may be useful in further understanding surface states of 3D TI. (C) 2011 American Institute of Physics. [doi:10.1063/1.3650263]
部门归属	[shao, huaihua; zhou, xiaoying; zhou, guanghui] hunan normal univ, dept phys, changsha 410081, hunan, peoples r china. [shao, huaihua; zhou, xiaoying; zhou, guanghui] hunan normal univ, key lab low dimens quantum struct & manipulat, minist educ, changsha 410081, hunan, peoples r china. [li, yuan] natl univ singapore, dept elect & comp engn, informat storage mat lab, singapore 117576, singapore. [liu, genhua] cent s univ forestry & technol, coll comp & informat sci, changsha 410004, hunan, peoples r china. [zhou, guanghui] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;shao, hh (reprint author), hunan normal univ, dept phys, changsha 410081, hunan, peoples r china;ghzhou@hunnu.edu.cn
关键词	Hgte Quantum-wells Single Dirac Cone Nanoribbons States
URL	查看原文
WOS记录号	WOS:000295883800058
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30644
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. H. Shao,X. Y. Zhou,Y. Li,et al. Spin polarization and charge transmission for a waveguide on surface of topological insulator[J]. Applied Physics Letters,2011,99(15).
APA	H. H. Shao,X. Y. Zhou,Y. Li,G. H. Liu,&G. H. Zhou.(2011).Spin polarization and charge transmission for a waveguide on surface of topological insulator.Applied Physics Letters,99(15).
MLA	H. H. Shao,et al."Spin polarization and charge transmission for a waveguide on surface of topological insulator".Applied Physics Letters 99.15(2011).

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