Negative magnetoresistance in Dirac semimetal Cd3As2 with in-plane magnetic field perpendicular to current

Cui, Hao-Nan1,2,3; Zhu, Guang-Yu2,3; Wang, Jian-Kun2,3; Yang, Jia-Jie2,3; Zheng, Wen-Zhuang1; Lin, Ben-Chuan2,3,4; Liao, Zhi-Min1; Wang, Shuo2,3,4; Yu, Da-Peng2,3,4

2023-07-01

10.1088/1674-1056/accd50

CHINESE PHYSICS B   影响因子和分区

1674-1056

2058-3834

Topological insulators and semimetals have exotic surface and bulk states with massless Dirac or Weyl fermions, demonstrating microscopic transport phenomenon based on relativistic theory. Chiral anomaly induced negative magnetoresistance (negative MR) under parallel magnetic field and current has been used as a probable evidence of Weyl fermions in recent years. Here we report a novel negative MR result with mutually perpendicular in-plane magnetic field and current in Cd3As2 nanowires. The negative MR has a considerable value of -16% around 1.5 K and could persist to room temperature of 300 K with value of -1%. The gate tuning and angle dependence of the negative MR demonstrate the mechanism of the observed negative MR is different from the chiral anomaly. Percolating current paths induced by charge puddles and disorder might be involved to produce such considerable negative MR. Our results indicate the negative MR effect in topological semimetals involves synergistic effects of many mechanisms besides chiral anomaly.

negative magnetoresistance chiral anomaly topological semimetals quantum transport

SCI ; EI

英语

通讯

National Natural Science Foundation of China["12004158","12074162","91964201"] ; National Key Research and Development Program of China["2022YFA1403700","2020YFA0309300"] ; Key-Area Research and Development Program of Guangdong Province, China[2018B030327001] ; Guangdong Provincial Key Laboratory[2019B121203002] ; Guangdong Basic and Applied Basic Research Foundation[2022B1515130005]

Physics

Physics, Multidisciplinary

WOS:001026804900001

IOP Publishing Ltd

20233014449051

Arsenic compounds ; Cadmium compounds ; Magnetoresistance ; Quantum chemistry

Magnetism: Basic Concepts and Phenomena:701.2 ; Physical Chemistry:801.4 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

Web of Science

1.Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Int Quantum Acad, Shenzhen 518048, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China

Cui, Hao-Nan,Zhu, Guang-Yu,Wang, Jian-Kun,et al. Negative magnetoresistance in Dirac semimetal Cd3As2 with in-plane magnetic field perpendicular to current[J]. CHINESE PHYSICS B,2023,32(7).

Cui, Hao-Nan.,Zhu, Guang-Yu.,Wang, Jian-Kun.,Yang, Jia-Jie.,Zheng, Wen-Zhuang.,...&Yu, Da-Peng.(2023).Negative magnetoresistance in Dirac semimetal Cd3As2 with in-plane magnetic field perpendicular to current.CHINESE PHYSICS B,32(7).

Cui, Hao-Nan,et al."Negative magnetoresistance in Dirac semimetal Cd3As2 with in-plane magnetic field perpendicular to current".CHINESE PHYSICS B 32.7(2023).