Effect of the Kohn anomaly on one-dimensional conduction

A correlation is found between the phonons which are softened because of the Kohn anomaly and the conduction properties in quasi-one-dimensional systems. In particular, the following phenomena are explained: (i) the conductivity peak in the metallic phase for the organic charge transfer systems; (ii) the observed shift of the conductivity peak to higher temperatures under irradiation; (iii) the observed dependence of the width of the conductivity peak on impurity concentration; and (iv) the temperature dependence of the conductivity in the commensurate phase. All these effects are related to the strong phonon drag effects near the Peierls transition.