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

作　　者：Wen-Chong Li Ling-Xiao Zhao Hai-Jun Zhao Gen-Fu Chen Zhi-Xiang Shi 李文充;赵凌霄;赵海军;陈根富;施智祥(School of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China;Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[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

出　　处：《Chinese Physics B》2022年第5期588-592,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11674054,U1932217,and 11704067)。

摘　　要：Due to non-saturating magnetoresistance(MR)and the special compensation mechanism,the Weyl semimetal Ta As 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 Ta As.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 nonsaturated magnetoresistance and Hall sign change phenomena of TaAs.

关 键 词：Weyl semimetal mobility spectrum analysis MAGNETORESISTANCE electrical transportation 

分 类 号：O469[理学—凝聚态物理]