Observation of the Chiral-Anomaly-Induced Negative Magnetoresistance in 3D Weyl Semimetal TaAs

被引：1528

作者：

Huang, Xiaochun ^{[1
,2
]}

Zhao, Lingxiao ^{[1
,2
]}

Long, Yujia ^{[1
,2
]}

Wang, Peipei ^{[1
,2
]}

Chen, Dong ^{[1
,2
]}

Yang, Zhanhai ^{[1
,2
]}

Liang, Hui ^{[1
,2
]}

Xue, Mianqi ^{[1
,2
]}

Weng, Hongming ^{[1
,2
,3
]}

Fang, Zhong ^{[1
,2
,3
]}

Dai, Xi ^{[1
,2
,3
]}

Chen, Genfu ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW X | 2015年 / 5卷 / 03期

基金：

中国国家自然科学基金;

关键词：

SURFACE FERMI ARCS; BERRYS PHASE; DIRAC; ELECTRON; MOBILITY;

D O I：

10.1103/PhysRevX.5.031023

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Weyl semimetal is the three-dimensional analog of graphene. According to quantum field theory, the appearance of Weyl points near the Fermi level will cause novel transport phenomena related to chiral anomaly. In the present paper, we report the experimental evidence for the long-anticipated negative magnetoresistance generated by the chiral anomaly in a newly predicted time-reversal-invariant Weyl semimetal material TaAs. Clear Shubnikov de Haas (SdH) oscillations have been detected starting from a very weak magnetic field. Analysis of the SdH peaks gives the Berry phase accumulated along the cyclotron orbits as pi, indicating the existence of Weyl points.

引用

页数：9

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