Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs

doi:10.1088/1674-1056/ac2b24

中国物理B ›› 2022, Vol. 31 ›› Issue (5): 57103-057103.doi: 10.1088/1674-1056/ac2b24

Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs

Wen-Chong Li(李文充)¹, Ling-Xiao Zhao(赵凌霄)², Hai-Jun Zhao(赵海军)^1,†, Gen-Fu Chen(陈根富)², and Zhi-Xiang Shi(施智祥)^1,‡

1 School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China;
2 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2021-07-18 修回日期:2021-09-15 发布日期:2022-04-29
通讯作者: Hai-Jun Zhao,E-mail:haijunzhao@seu.edu.cn;Zhi-Xiang Shi,E-mail:zxshi@seu.edu.cn E-mail:haijunzhao@seu.edu.cn;zxshi@seu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos.11674054,U1932217,and 11704067).

Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs

Wen-Chong Li(李文充)¹, Ling-Xiao Zhao(赵凌霄)², Hai-Jun Zhao(赵海军)^1,†, Gen-Fu Chen(陈根富)², and Zhi-Xiang Shi(施智祥)^1,‡

1 School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China;
2 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2021-07-18 Revised:2021-09-15 Published:2022-04-29
Contact: Hai-Jun Zhao,E-mail:haijunzhao@seu.edu.cn;Zhi-Xiang Shi,E-mail:zxshi@seu.edu.cn E-mail:haijunzhao@seu.edu.cn;zxshi@seu.edu.cn
About author:2021-9-29
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.11674054,U1932217,and 11704067).

摘要/Abstract

摘要： Due to non-saturating magnetoresistance (MR) and the special compensation mechanism, the Weyl semimetal TaAs single crystal has attracted considerable attention in condensed matter physics. Herein, we use maximum entropy mobility spectrum analysis (MEMSA) to extract charge carrier information by fitting the experimentally measured longitudinal and transverse electric transport curves of TaAs. The carrier types and the number of bands are obtained without any hypothesis. Study of the temperature dependence shows details of carrier property evolution. Our quantitative results explain the non-saturated magnetoresistance and Hall sign change phenomena of TaAs.

关键词: Weyl semimetal, mobility spectrum analysis, magnetoresistance, electrical transportation

Abstract: Due to non-saturating magnetoresistance (MR) and the special compensation mechanism, the Weyl semimetal TaAs single crystal has attracted considerable attention in condensed matter physics. Herein, we use maximum entropy mobility spectrum analysis (MEMSA) to extract charge carrier information by fitting the experimentally measured longitudinal and transverse electric transport curves of TaAs. The carrier types and the number of bands are obtained without any hypothesis. Study of the temperature dependence shows details of carrier property evolution. Our quantitative results explain the non-saturated magnetoresistance and Hall sign change phenomena of TaAs.

Key words: Weyl semimetal, mobility spectrum analysis, magnetoresistance, electrical transportation

中图分类号: (Metals, semimetals, and alloys)

71.55.Ak

72.15.-v (Electronic conduction in metals and alloys) 73.43.Qt (Magnetoresistance)

Wen-Chong Li(李文充), Ling-Xiao Zhao(赵凌霄), Hai-Jun Zhao(赵海军),Gen-Fu Chen(陈根富), and Zhi-Xiang Shi(施智祥). Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs[J]. 中国物理B, 2022, 31(5): 57103-057103.

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Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs

Maximum entropy mobility spectrum analysis for the type-I Weyl semimetal TaAs

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