Electronic structure and transport on the surface of topological insulator attached to an electromagnetic superlattice

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	Electronic structure and transport on the surface of topological insulator attached to an electromagnetic superlattice
	H. Y. Wang; X. W. Chen; X. Y. Zhou; L. B. Zhang; G. H. Zhou
	2012
发表期刊	Physica B-Condensed Matter
ISSN	0921-4526
卷号	407 期号:17 页码:3664-3670
摘要	We study the electronic structure and transport for Dirac electron on the surface of a three-dimensional (3D) topological insulator attached to an electromagnetic superlattice. It is found that, by means of the transfer-matrix method, the number of electronic tunneling channels for magnetic barriers in antiparallel alignment is larger than that in parallel alignment, which stems to the energy band structures. Interestingly, a remarkable semiconducting transport behavior appears in this system with a strong magnetic barrier due to low energy band nearly paralleling to the Fermi level. Consequently, there is only small incident angle transport in the higher energy region when the system is modulated mainly by the higher electric barriers. We further find that the spatial distribution of the spin polarization oscillates periodically in the incoming region, but it is almost in-plane with a fixed direction in the transmitting region. The results may provide a further understanding of the nature of 3D TI surface states, and may be useful in the design of topological insulator-based electronic devices such as collimating electron beam. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[wang, haiyan; chen, xiongwen; zhou, xiaoying; zhang, lebo; zhou, guanghui] hunan normal univ, dept phys, changsha 410081, hunan, peoples r china. [wang, haiyan; chen, xiongwen; zhou, xiaoying; zhang, lebo; zhou, guanghui] hunan normal univ, key lab low dimens quantum struct & manipulat, minist educ, changsha 410081, hunan, peoples r china. [chen, xiongwen] huaihua univ, dept phys & elect informat sci, huaihua 418008, peoples r china. [zhou, guanghui] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;zhou, gh (reprint author), hunan normal univ, dept phys, changsha 410081, hunan, peoples r china.;ghzhou@hunnu.edu.cn
关键词	Surface Of 3d Ti Electromagnetic Superlattice Transport Quantum Spin Hall Single Dirac Cone Phase-transition Bi2te3 Wells State
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60285
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Y. Wang,X. W. Chen,X. Y. Zhou,et al. Electronic structure and transport on the surface of topological insulator attached to an electromagnetic superlattice[J]. Physica B-Condensed Matter,2012,407(17):3664-3670.
APA	H. Y. Wang,X. W. Chen,X. Y. Zhou,L. B. Zhang,&G. H. Zhou.(2012).Electronic structure and transport on the surface of topological insulator attached to an electromagnetic superlattice.Physica B-Condensed Matter,407(17),3664-3670.
MLA	H. Y. Wang,et al."Electronic structure and transport on the surface of topological insulator attached to an electromagnetic superlattice".Physica B-Condensed Matter 407.17(2012):3664-3670.