Charge transport and shot noise on the surface of a topological insulator with a magnetic modulation

doi:10.1088/1674-1056/21/4/047203

中国物理B ›› 2012, Vol. 21 ›› Issue (4): 47203-047203.doi: 10.1088/1674-1056/21/4/047203

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

袁建辉,成泽,张建军,曾奇军,张俊佩

收稿日期:2011-10-08 修回日期:2011-11-14 出版日期:2012-02-29 发布日期:2012-02-29
通讯作者: 袁建辉,jianhui831110@163.com E-mail:jianhui831110@163.com

Charge transport and shot noise on the surface of a topological insulator with a magnetic modulation

Yuan Jian-Hui(袁建辉)^†, Cheng Ze(成泽), Zhang Jian-Jun(张建军), Zeng Qi-Jun(曾奇军), and Zhang Jun-Pei(张俊佩)

School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2011-10-08 Revised:2011-11-14 Online:2012-02-29 Published:2012-02-29
Contact: Yuan Jian-Hui,jianhui831110@163.com E-mail:jianhui831110@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10174024 and 10474025).

摘要/Abstract

Abstract: In this paper, we investigate the transport features and the Fano factor of Dirac electrons on the surface of a three-dimensional topological insulator with a magnetic modulation. We consider a hard wall bounding condition on the edge of the topological insulator, which implies that a surface state of the topological insulator is insulating. We find that a valley of conductivity at the Dirac point is associated with a Fano factor peak, and more interestingly, this topological metal changes from insulating to metallic by controlling the effective exchange field.

Key words: topological insulator, electronic transport, ferrimagnetic

中图分类号: (Insulators)

72.80.Sk

73.40.-c (Electronic transport in interface structures) 75.50.Gg (Ferrimagnetics)

袁建辉,成泽,张建军,曾奇军,张俊佩. [J]. 中国物理B, 2012, 21(4): 47203-047203.

Yuan Jian-Hui(袁建辉), Cheng Ze(成泽), Zhang Jian-Jun(张建军), Zeng Qi-Jun(曾奇军), and Zhang Jun-Pei(张俊佩) . Charge transport and shot noise on the surface of a topological insulator with a magnetic modulation[J]. Chin. Phys. B, 2012, 21(4): 47203-047203.

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Charge transport and shot noise on the surface of a topological insulator with a magnetic modulation

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