PHONON THERMAL-CONDUCTIVITY OF THE INORGANIC QUASI-ONE-DIMENSIONAL CONDUCTORS

The scattering mechanisms involved in heat transport of the inorganic quasi-one-dimensional conductors exhibiting charge density waves (CDW) may be investigated through thermal conductivity measurements. In par ticular, measurements of the thermal conductivity K(T), in the range 1 ,5-350 K, on (TaSe4)(2)I, (NbSe4)(3.3)I, K0.3MoO3 can give information on different types of scatterings: by the soft Kohn-Peierls phonons a bove the Peierls temperature T-c, by the excitations of the CDW just b elow T-c and by defects at low temperatures in the vicinity of K(T) ma ximum in addition to the umklapp scattering. Tn order to interpret K(T ) specific for CDW ground stale, we show for comparison the results ob tained for (NbSe4)(3)I, which is structurally similar to (TaSe4)(2)I a nd (NbSe4)(3.3)I, but it does not exhibit CDW.