The metallic state of conducting polymers is a subject of continued interest and controversy. By means of a series of high-precision reflectance measurements on PF6-doped polypyrrole (PPy-PF6), the processes occurring as the system passes through the metal–insulator (M–I) transition are clarified. Evidence is presented that metallic PPy-PF6 is a “disordered metal” and that the M–I transition is disorder induced. It is concluded that the electronic properties of PPy-PF6 result from weak localization and an Anderson-like M–I transition.
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Lee et al. (1998) studied this question.
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