Numéro |
J. Phys. I France
Volume 2, Numéro 7, July 1992
|
|
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Page(s) | 1497 - 1505 | |
DOI | https://doi.org/10.1051/jp1:1992218 |
J. Phys. I France 2 (1992) 1497-1505
Non-linear dynamics of charge-density-wave in orthorombic TaS 3 at microwaves
I. B. Vendik, V. M. Pchelkin and A. V. ShchepakElectrical Engineering Institute, 5, Prof. Popov street, St. Petersburg, 197376, Russia
(Received 30 January 1992, accepted in final form 9 March 1992)
Abstract
Non-linear dc and microwave conductivity due to collective transport of charge density-wave in TaS
3 was experimentally investigated at
T=78-215 K. The non-linear dc field dependence of a differential conductivity
exhibits a threshold field
sharply defined in the temperature range of 140-215 K. As the temperature decreases beyond 140 K the field
disappears, and the second threshold field
originates. The two fields are temperature dependent and show decreasing under a microwave radiation. A non-linear response
to the microwave radiation was observed at
T=78-215 K in a mixing experiment (detuned case,
). The dc field dependencies of the non-linear response
reveral no signs of the threshold field singularities. The experimental result have been satisfactorily described by a classical
model of an overdamped oscillator by introducing an empirical distribution function for the threshold field and by averaging
over
.
© Les Editions de Physique 1992