Temperature-dependent non linear conduction in composites

被引：3
|
作者：
Nandi, UN
Bardhan, KK
Mukherjee, CD
机构：
来源：
DISORDERED MATERIALS - CURRENT DEVELOPMENTS - | 1996年 / 223卷
关键词：
inhomogeneous systems; composites; nonlinear conduction; percolation; scaling exponent;
D O I：
10.4028/www.scientific.net/MSF.223-224.261
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The current-voltage characteristics of carbon-wax composites with a fixed carbon fraction (p) slightly above the percolation threshold show nonlinear behaviour at different temperatures (T). The onset current, I-o(T) at which conductance starts deviating from its zero-bias value, Sigma(0)(T) scales as I-o similar to Sigma(0)(x), the exponent x being similar to 1.4. Interestingly, the same scaling behaviour of I-o with Sigma(0) was observed by varying p at a fixed T.
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页码：261 / 265
页数：5
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