'Inductive' response from non-linear mixing in sliding charge density waves.

It is an apparent paradox that although the measured frequency- dependent linear conductivity of sliding charge-density-wave (CDW) materials is well- described by a purely dissipative model of CDW motion, sereval experiments involving the non- linear response have demonstrated inductive effects characteristic of inertial systems. We show here that these results can be reconciled within a strongly dissipative model of CDW dynamics, provided the internal elastic degrees of freedom are taken into account. As a consequence, we predict a "ringing" oscillation of the CDW when the d.c driving field is suddenly changed above the threshold.