Thermal-history-dependent transition in pressed pellets of ClO4 - Doped poly(3-methylthiophene)

• Autor(a) principal: Pereira, E. C.
• Data de Publicação: 1994
• Outros Autores: Bulhoes, L. O.S., Pawlicka, A., Nascimento, O. R., Faria, R. M., Walmsley, L. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevB.50.3648; http://hdl.handle.net/11449/223893

Electron-spin-resonance and dc conductivity data show a thermal-history-dependent transition at 240 K in pressed pellets of ClO4 - doped poly(3-methylthiophene) (P3MT). We discuss the possibility of this transition to be a Peierls transition from a room-temperature-metallic to a charge-density-wave state driven by anions ordering at this temperature. Below 100 K, dc conductivity shows a change from linear to exponential decay. Nonlinear conductivity has also been observed in this system for very low electric fields. © 1994 The American Physical Society.