Inhomogeneous insulator-metal transition in conducting polymers
1997
Abstract A review of recent work on the insulator-metal transition (IMT) in conducting polymers is presented. The temperature dependence of the dielectric function [e(ω)] of highly conducting polyaniline and polypyrrole, which cross the IMT as probed by δ DC (T) , has been measured over an unusually broad range of frequencies (6.5 GHz and 2 meV− 6 eV). These data demonstrate that the inhomogeneous disorder model is a more appropriate description for the IMT than the homogeneous three-dimensional Anderson model.
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