Effective-Medium Approach for Conductivities in Multi-Component Granular Mixtures  

作　　者：李宁 张用友 金国钧 

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093

出　　处：《Chinese Physics Letters》2008年第12期4395-4398,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10674058 and 60371013, and the National Basic Research Programme of China under Grant No 2006CB921803.

摘　　要：We apply the effective-medium theory to a multi-component mixture system, by which the effective longitudinal and Hall conductivities can be calculated. We find that there is more than one threshold in the multi-component mixture, and the maximum number of thresholds is one less than the component number, Further, the thresholds are mainly dependent on the relative volume ratio of the components when the conductivity ratios between any two components are far larger or smaller than one.We apply the effective-medium theory to a multi-component mixture system, by which the effective longitudinal and Hall conductivities can be calculated. We find that there is more than one threshold in the multi-component mixture, and the maximum number of thresholds is one less than the component number, Further, the thresholds are mainly dependent on the relative volume ratio of the components when the conductivity ratios between any two components are far larger or smaller than one.

关 键 词：field emission molybdenum dioxide enhancement factor 

分 类 号：O4[理学—物理]