Signature of chiral fermion instability in the Weyl semimetal TaAs above the quantum limit

被引：31
|
作者：
Zhang, Cheng-Long [1 ]
Tong, Bingbing [1 ]
Yuan, Zhujun [1 ]
Lin, Ziquan [2 ]
Wang, Junfeng [2 ]
Zhang, Jinglei [3 ]
Xi, Chuan-Ying [3 ]
Wang, Zhong [4 ,5 ]
Jia, Shuang [1 ,5 ]
Zhang, Chi [1 ,5 ]
机构：
[1] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
[2] Huazhong Univ Sci & Technol, Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
[3] Chinese Acad Sci, Natl High Magnet Field Lab, Hefei 230031, Peoples R China
[4] Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW B | 2016年 / 94卷 / 20期
基金：
美国国家科学基金会;
关键词：
ELECTRONIC PHASE-TRANSITION; HIGH-MAGNETIC-FIELD; GRAPHITE; MAGNETORESISTANCE; GAS;
D O I：
10.1103/PhysRevB.94.205120
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the electrical transport properties for Weyl semimetal TaAs in an intense magnetic field. Strong temperature-dependent anomalies occur in the Hall signals and longitudinal magnetoresistance at low temperatures when the Weyl electrons are confined into the lowest Landau level. The temperature-dependent behaviors indicate that electron-hole pairing instability may be the origin of the anomalies. Our measurements show that the ultraquantum regime for the Weyl semimetals is not featureless.
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页数：6
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