Low frequency dielectric response of charge density wave systems K0.3MoO3
and o-TaS3 shows hysteresis
on temperature cycling. The closing of the hysteresis at low temperature coincides in both systems with the closing
of the hysteresis in DC conductivity and corresponds to the temperature of the glass transition observed in dielectric
response of these two systems. AC conducitivity is higher on heating, while DC conductivity is lower, i.e. two
loops have opposite directions. Higher AC conducitivity (or dielectric response) is a consequence of more
corrugated CDW phase on heating.
We calculate the influence of transverse fluctuations on the longitudinal dynamics in the
striped phase of cuprates by using the bosonization technique. We find that a charge density
wave instability can arise if the stripe is quarter filled and the underlying lattice potential has a
zig-zag symmetry. Our results shed light on the as yet not understood connection between the
formation of a low temperature tetragonal phase and the subsequent appearance of charge
order in high-Tc cuprates.
Numerical based study on charge density wave dynamics in a one-dimensional conductor in the low temperature limit