Electron tunneling through double magnetic barriers in Weyl semimetals

被引：4

作者：

Hu, Xunwu ^{[1
]}

Cheng, Fang ^{[1
]}

机构：

[1] Changsha Univ Sci & Technol, Dept Phys & Elect Sci, Changsha 410004, Hunan, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

中国国家自然科学基金;

关键词：

TOPOLOGICAL DIRAC SEMIMETAL; DISCOVERY; MAGNETORESISTANCE;

D O I：

10.1038/s41598-017-12835-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We theoretically investigate the transport in a magnetic/normal/magetic hybrid structure on the surface of a Weyl semimetal. We find a directional-dependent tunneling which is sensitive to the magnetic field configuration and the electric gate voltage. The momentum filtering behavior becomes more significant for two-delta-function-shaped magnetic barriers. There are many Fabry-Perot resonances in the transmission determined by the distance between the two magnetic barriers. The combined effects of the magnetic field and the electrostatic potential can enhance the difference in the transmission between the parallel and antiparallel magnetization configurations, and consequently lead to a giant magnetoresistance.

引用

页数：11

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