PHASON CONTRIBUTION TO THE THERMAL-CONDUCTIVITY OF CDW SYSTEMS

We claim that there is an additional contribution to the thermal condu ctivity in excess of the normal phonon and free carriers contribution in charge-density-wave (CDW) systems below Peierls transition which we attribute to the phase oscillations of (CDW) order parameter. We demo nstrate for two chosen CDW systems, K0.3MoO3 and (NbSe4)10I3, that the observed increase in the thermal conductivity corresponds to the temp erature range where the screening of the Coulomb interactions is suffi cient to allow the contribution of the weakly damped phasons with larg e velocity.