J. Phys. IV France
Volume 131, December 2005
Page(s) 123 - 124
Publié en ligne 18 janvier 2006
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 123-124

DOI: 10.1051/jp4:2005131028

Conduction and optical effects in the plastic charge-density waves

N. Ogawa1, K. Miyano2 and S. Brazovskii3

1  Department of Physics, University of California at Irvine, Irvine, CA 92697-4575, USA
2  RCAST, University of Tokyo, Tokyo 153-8904, Japan
3  Laboratoire de Physique Théorique et Modèles Statistiques, CNRS, Bât. 100, Université Paris-Sud, 91405 Orsay Cedex, France

The creep motion of the charge-density wave (CDW) and its modulation through optical excitation in the low-temperature state of K0.3MoO3 are analyzed in terms of a local pinning theory, in which local metastable states created by pinning induced phase dislocations are considered. The nonlinear I-V curve below the sliding threshold field (Vs) can be well reproduced with a numerical calculation, and it is shown that photoexcitation increases the transition probability of phase slips, which promotes the creep motion, and also leads to a relaxation of the phase strain.

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