Analytical formula describing the non-saturating linear magnetoresistance in inhomogeneous conductors  

作　　者：Shan-Shan Chen Yang Yang Fan Yang 陈珊珊;杨阳;杨帆(Center for Joint Quantum Studies and Department of Physics,School of Science,Tianjin University,Tianjin 300350,China)

机构地区：[1]Center for Joint Quantum Studies and Department of Physics,School of Science,Tianjin University,Tianjin 300350,China

出　　处：《Chinese Physics B》2022年第8期594-597,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11904259);the Natural Science Foundation of Tianjin(Grant No.20JC-QNJC02040)。

摘　　要：The effective-medium theory(EMT)has proved successful in modeling the non-saturating linear magnetoresistance induced by inhomogeneity.However,calculating magnetoresistance using the EMT usually involves solving coupled integral equations which have no analytical solutions,and therefore,it is still difficult to directly compare the predictions of EMT with experimental data.Here we demonstrate that the linear magnetoresistance predicted by the EMT can be either exactly formulated or well approximated by a simple analytical equationΔ_(ρ)/ρ_(0)=√k^(2)B^(2)+a^(2)-a in a number of known situations.The relations between the EMT parameters and the phenomenological parameters k and a are evaluated.Our results provide a convenient and effective method for extracting the EMT parameters from experimental data.

关 键 词：linear magnetoresistance effective medium theory 

分 类 号：O469[理学—凝聚态物理]