Effect of the screened Coulomb disorder on magneto-transport in Weyl semimetals

Ji, Xuan-Ting1,2; Lu, Hai-Zhou3,4; Zhu, Zhen-Gang1,2,5; Su, Gang2,5,6

2018-05-28

10.1063/1.5021181

JOURNAL OF APPLIED PHYSICS   影响因子和分区

0021-8979

1089-7550

The observation of negative longitudinal magnetoresistivity (NLMR) in Weyl semimetals has gained strong support in recent experiments. It is believed that charged impurities play an important role in the measurement of NLMR. We thus employ a screened Coulomb disorder to model charged impurities and derive a general screening length depending on the magnetic field, chemical potential and temperature. We study the magneto-transport in a two-node Weyl semimetal in which the intravalley scattering and the inter-valley scattering can be explored simultaneously. We also calculate the effect of the misalignment of the external electric field and the magnetic field on the longitudinal and transverse magnetoconductivities, recovering the experimental observations. We show that the former (latter) is suppressed (enhanced) sensitively with the density of the impurity. This feature makes it hard to observe the NLMR in experiments in the heavy doping case. These results may be exploited to explain the sample-dependent observation of NLMR and deepen our understanding of magneto-transport in Weyl semimetals. Published by AIP Publishing.

SCI ; EI

英语

通讯

Key Research Program of the Chinese Academy of Sciences[XDPB08]

Physics

Physics, Applied

WOS:000433977200008

AMER INST PHYSICS

20182205254215

Electric fields ; Electromagnetic wave scattering ; Impurities ; Magnetic fields

Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Electromagnetic Waves:711 ; Materials Science:951

PHYSICS

Web of Science

1.Univ Chinese Acad Sci, Sch Elect Elect & Commun Engn, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Theoret Condensed Matter Phys & Computat Mat Phys, Beijing 100049, Peoples R China
3.South Univ Sci & Technol China, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China
5.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China
6.Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing 100190, Peoples R China

Ji, Xuan-Ting,Lu, Hai-Zhou,Zhu, Zhen-Gang,et al. Effect of the screened Coulomb disorder on magneto-transport in Weyl semimetals[J]. JOURNAL OF APPLIED PHYSICS,2018,123(20).

Ji, Xuan-Ting,Lu, Hai-Zhou,Zhu, Zhen-Gang,&Su, Gang.(2018).Effect of the screened Coulomb disorder on magneto-transport in Weyl semimetals.JOURNAL OF APPLIED PHYSICS,123(20).

Ji, Xuan-Ting,et al."Effect of the screened Coulomb disorder on magneto-transport in Weyl semimetals".JOURNAL OF APPLIED PHYSICS 123.20(2018).