CHARGE-DENSITY WAVE TRANSPORT OF QUASI-ONE-DIMENSIONAL CONDUCTORS AT LOW-TEMPERATURES

We have measured the conductivity of orthorhombic and monoclinic TaS3 as well as blue bronze K0.3MoO3 as a function of electric field (10(-2) V/cm to 500 V/cm) at the low temperatures down to 4.2 K. Two threshold fields E(T) and E(T) are revealed and their temperature dependences are analyzed. The results obtained are explained on the base of supposition that the onset of non-linear conductivity is associated with the beginning of the motion of defects and dislocations in CDW superlattice. At the electric field range E(T) < E < E(T) this motion has random character, but at E > E(T) the slippage of CDW phase with periodical nucleation and coherent motion of these dislocations becomes main process.