1 / f noise through the metal – nonmetal transition in percolating composites

@inproceedings{Breeze20001F,
  title={1 / f noise through the metal – nonmetal transition in percolating composites},
  author={A. J. Breeze and S. A. Cartera},
  year={2000}
}
We have measured the 1/ f noise through the metal–nonmetal transition in carbon black/polymer composites as a function of temperature and doping. At the electronic transition, the resistivity power spectrumSr varies asSr;r , with Q52.77, in agreement with classical three-dimensional percolation. At lower temperatures, a crossover to tunneling-dominated transport occurs with Sr ; ln Sr /r . Our results show that 1/ f noise can be a more sensitive technique than resistivity itself for probing… CONTINUE READING