Publication
Article Metrics
Citations
Online attention
Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal
Authors:
Cheng-Long
Zhang
(Peking University)
,
Su-Yang
Xu
(Princeton University)
,
Ilya
Belopolski
(Princeton University)
,
Zhujun
Yuan
(Peking University)
,
Ziquan
Lin
(Huazhong University of Science and Technology)
,
Bingbing
Tong
(Peking University)
,
Guang
Bian
(Princeton University)
,
Nasser
Alidoust
(Princeton University)
,
Chi-Cheng
Lee
(National University of Singapore)
,
Shin-Ming
Huang
(National University of Singapore)
,
Tay-Rong
Chang
(Princeton University)
,
Guoqing
Chang
(National University of Singapore)
,
Chuang-Han
Hsu
(National University of Singapore)
,
Horng-Tay
Jeng
(National Tsing Hua University)
,
Madhab
Neupane
(Princeton University)
,
Daniel
Sanchez
(Princeton University)
,
Hao
Zheng
(Princeton University)
,
Junfeng
Wang
(Huazhong University of Science and Technology)
,
Hsin
Lin
(National University of Singapore)
,
Chi
Zhang
(Peking University)
,
Hai-Zhou
Lu
(South University of Science and Technology of China)
,
Shun-Qing
Shen
(The University of Hong Kong)
,
Titus
Neupert
(Princeton University)
,
M.
Zahid Hasan
(Princeton University)
,
Shuang
Jia
(Peking University)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Nature Communications
, VOL 7
State:
Published (Approved)
Published:
February 2016

Abstract: Weyl semimetals provide the realization of Weyl fermions in solid-state physics. Among all the physical phenomena that are enabled by Weyl semimetals, the chiral anomaly is the most unusual one. Here, we report signatures of the chiral anomaly in the magneto-transport measurements on the first Weyl semimetal TaAs. We show negative magnetoresistance under parallel electric and magnetic fields, that is, unlike most metals whose resistivity increases under an external magnetic field, we observe that our high mobility TaAs samples become more conductive as a magnetic field is applied along the direction of the current for certain ranges of the field strength. We present systematically detailed data and careful analyses, which allow us to exclude other possible origins of the observed negative magnetoresistance. Our transport data, corroborated by photoemission measurements, first-principles calculations and theoretical analyses, collectively demonstrate signatures of the Weyl fermion chiral anomaly in the magneto-transport of TaAs.
Journal Keywords: Condensed-matter physics; Theoretical physics
Subject Areas:
Physics,
Materials
Instruments:
I05-ARPES
Other Facilities: Advanced Light Source; Stanford Synchrotron Radiation Lightsource; Swiss Light Source
Added On:
15/11/2016 14:30
Documents:
ncomms10735.pdf
Discipline Tags:
Quantum Materials
Physics
Hard condensed matter - structures
Magnetism
Materials Science
Theoretical Physics
Technical Tags:
Spectroscopy
Angle Resolved Photoemission Spectroscopy (ARPES)