Ultraslow electron-phonon scattering and polaron formation in magnetite  

作　　者：Adrian Radoń DariuszŁukowiec Patryk Włodarczyk 

机构地区：[1]Łukasiewicz Research Network-Institute of Non-Ferrous Metals,Sowinskiego 5 St.,44-100,Gliwice,Poland [2]Faculty of Mechanical Engineering,Silesian University of Technology,Konarskiego 18 a St.,44-100,Gliwice,Poland

出　　处：《Journal of Materiomics》2022年第1期150-155,共6页无机材料学学报（英文）

基　　金：supported by the Polish Ministry of Science and Higher Education[grant number 0220/DIA/2018/470];the National Science Center,Poland[grant number 2016/23/B/ST8/03405].

摘　　要：The comprehensive analysis of AC electrical conductivity in magnetite was performed in order to find relations between the formation of polarons,phonons and conduction by a virtual free electron gas.The analysis performed here for the first time shows experimental data for the behavior of electrons for magnetite with the scattering time shifted to the GHz region.According to our study,the DC electrical conductivity can be described by the virtual free electron gas model,and high frequency conductivity can be described by the combination of the Drude model for disordered materials and Jonscher's universal power law.The observed peak at the imaginary part of AC conductivity was related to the scattering time of the electron-phonon coupling.This interaction between electrons and thermally formed phonons results in the formation of large polarons,and these are responsible for high frequency conductivity in magnetite.

关 键 词：MAGNETITE Drude model Power law Electrical conductivity Virtual free electron gas 

分 类 号：O47[理学—半导体物理]