Lattice thermal conduction in cadmium arsenide  

作　　者：R F Chinnappagoudra M D Kamatagi N R Patil N S Sankeshwar 

机构地区：[1]Department of Physics,S.S.Government First Grade College,Nargund-582207,Karnataka,India [2]Research Resource Centre,Visvesvaraya Technological University,Belagavi-590018,Karnatak,India [3]Department of Physics,B V B College of Engineering and Technology,Hubli,Karnataka 80031,India [4]Department of Physics&Electronics,CHRIST(Deemed to be University),Bangalore-560029,Karnataka,India

出　　处：《Chinese Physics B》2022年第11期424-430,共7页中国物理B（英文版）

基　　金：supported by University Grants Commission(UGC),India。

摘　　要：Lattice thermal conductivity(LTC)of cadmium arsenide(Cd_(3)As_(2))is studied over a wide temperature range(1–400 K)by employing the Callaway model.The acoustic phonons are considered to be the major carriers of heat and to be scattered by the sample boundaries,disorder,impurities,and other phonons via both Umklapp and normal phonon processes.Numerical calculations of LTC of Cd_(3)As_(2)bring out the relative importance of the scattering mechanisms.Our systematic analysis of recent experimental data on thermal conductivity(TC)of Cd_(3)As_(2)samples of different groups,presented in terms of LTC,κL,using a nonlinear regression method,reveals good fits to the TC data of the samples considered for T<~50 K,and suggests a value of 0.2 for the Gruneisen parameter.It is,however,found that for T>100 K the inclusion of the electronic component of TC,κe,incorporating contributions from relevant electron scattering mechanisms,is needed to obtain good agreement with the TC data over the wide temperature range.More detailed investigations of TC of Cd_(3)As_(2)are required to better understand its suitability in thermoelectric and thermal management devices.

关 键 词：dirac semimetals Cd_(3)As_(2) thermal conductivity phonon scattering 

分 类 号：TQ132.44[化学工程—无机化工] O469[理学—凝聚态物理]