Thermal conductivity of the charge-density-wave systems K0.3MoO3 and (TaSe4)2I near the Peierls transition.

We report on measurements of the thermal conductivity {kappa}{sub {ital T}} close to the Peierls transition temperature {ital T}{sub {ital P}} in K{sub 0.3}MoO{sub 3} and (TaSe{sub 4}){sub 2}I. In both cases there is an enhancement of {kappa}{sub {ital T}} that peaks at the transition. Simultaneous measurements of the specific heat suggest that the anomalous behavior is a result of mode occupation rather than changes in electron- or phonon-scattering processes.