Nature of the Metallic State in Conducting Polypyrrole (pages 456–459)
Kwanghee Lee, Eward K. Miller, Andrei N. Aleshin, Reghu Menon, Alan J. Heeger, Jong Hyun Kim, Chul Oh Yoon and Hosull Lee
Article first published online: 26 JAN 1999 | DOI: 10.1002/(SICI)1521-4095(199804)10:6<456::AID-ADMA456>3.0.CO;2-M
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.