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
刊名	Applied Physics Letters
	2011
卷号	99 期号:15
关键词	hgte quantum-wells single dirac cone nanoribbons states
ISSN号	0003-6951
中文摘要	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]
原文出处	://WOS:000295883800058
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/30644]
专题	金属研究所_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).