J. Phys. IV France
Volume 12, Numéro 9, November 2002
Page(s) 313 - 314

J. Phys. IV France
12 (2002) Pr9-313
DOI: 10.1051/jp4:20020423

Thermal hysteresis in low frequency dielectric response of charge density wave systems TaS 3 and K 0.3Mo0 3

A. Akrap1, D. Staresinic1, K. Biljakovic1, P. Lunkenheimer2 and A. Loidl2

1  Institute of Physics, P.O. Box 304, 10001 Zagreb, Croatia
2  University of Augsburg, Experimentalphysik V, Universitaetsstr. 2, 86135 Augsburg, Germany

Low frequency dielectric response of charge density wave systems K 0.3MoO 3 and o-TaS 3 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.

© EDP Sciences 2002