Title of article :
Magnetoresistance of a copolymer: FeCl3-doped poly(2,5-dioctyloxy-p-phenylene vinylene-alt-3,4-ethylenedioxythiophene vinylene)
Author/Authors :
Kim، نويسنده , , Kyung Ho and Choi، نويسنده , , Ajeong and Park، نويسنده , , Jun-Mo and Hong، نويسنده , , Sung-Ju and Park، نويسنده , , Min and Lee، نويسنده , , In-Hwan and Choi، نويسنده , , Eun Sang and Kaiser، نويسنده , , Alan B. and Choi، نويسنده , , Tae-Lim and Park، نويسنده , , Yung Woo، نويسنده ,
Abstract :
An experimental study of the low temperature magnetoresistance (MR) in a FeCl3-doped copolymer in which ethylenedioxythiophene and phenylene are alternatively linked by vinylene units is reported. The temperature dependence of conductivity followed characteristics of Coulomb gap variable range hopping (VRH) at low temperatures. The MR showed a crossover from negative to positive values. The crossover was explained by competition of negative and positive contributions which originated from quantum interference and shrinkage of wave function, respectively.
