Abstract

Abstract The thermopower of monoclinic TaS3 shows that the charge-density-wave driven metal-insulator transition at 160 K is comparable to the Peierls transitions in organic conductors. However, the insulating low temperature state with thermally activated conductivity is quite unsensitive to irradiation induced disorder. Instead the disorder pushes the insulating properties up to higher temperatures, in samples with about 10−2 at fraction of defects the conductivity is activated and the thermopower has a 1/T dependence in all the measured range from ~ 60 to 300 K.

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