International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 119-120
DOI: 10.1051/jp4:2005131026
Numerical study on "plastic flow - moving solid" transition of charge density waves in nonequilibrium steady state under external drive
T. Nogawa1, H. Yoshino2 and H. Matsukawa31 Division of Physics, Graduate School of Science, Hokkaido University, Kita-ku Kita 10-Jo Nishi 8-Chome, Sapporo, Hokkaido 060-0810, Japan
2 Department of Earth and Space Science, School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0013, Japan
3 Department of Physics, College of Science and Engineering, Aoyama Gakuin University, Fuchinobe 5-10-1, Sagamihara, Kanagawa 229-8558, Japan
Abstract
Dynamical phase transition of charge density waves
between "plastic flow" and "moving solid" phases
controlled by electric field is numerically studied
based on the three dimensional driven random field XY model.
We analyze a spatial configuration of local velocity
and find a percolation transition of a co-moving domain.
The critical driving force, however,
logarithmically diverges with the observation time.
The moving solid phase has a finite life time
that grows exponentially with the driving force.
© EDP Sciences 2005