Field-dependent conductivity at low electric fields in pressed pellets of doped poly(3-methylthiophene): evidence of charge-density wave depinning

Abstract

Field-dependent conductivity at low electric fields was observed from low to room temperature in pressed pellets of doped poly(3-methylthiophene). The room temperature data showed good agreement with Bardeen's theory of charge-density wave depinning and the values of the parameters obtained are consistent with a strong electron–phonon interaction as expected for quasi-one dimensional systems.