Thermal-history-dependent transition in pressed pellets of ClO4 - Doped poly(3-methylthiophene)
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1994-01-01
Autores
Pereira, E. C.
Bulhoes, L. O.S.
Pawlicka, A.
Nascimento, O. R.
Faria, R. M.
Walmsley, L. [UNESP]
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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.
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Physical Review B, v. 50, n. 6, p. 3648-3651, 1994.