Polaron induced modification of the speed of sound in quasi-one-dimensional molecular crystals

We study the possible influence of polaron effect on the phonon spectrum in quasi-one-dimensional molecular chains. It was found that polaron induced phonon correlations may lead to the characteristic modifications of the phonon frequencies and speed of sound which shows specific temperature dependence for particular type of polaron. (C) 2003 Elsevier B.V. All rights reserved