Abstract
We report on non-linear transport properties in K0.3MoO3 molybdenum blue
bronze. We show that the conductivity sharply increases above a characteristic
threshold field ET* in three perpendicular crystallographic directions. This
threshold field is visible up to room temperature in the direction perpendicular
to the (
01) plane. Data suggests that this singularity is
probably not related to the motion of the Charge Density Wave (CDW).
Along the CDW axis, the electric field dependence of the conductivity
for E < ET* can be very well described by the scaling
theory of the CDW creep in the presence of randomly distributed
pinning centers.