Defects, order, and hysteresis in driven charge-density waves
Disordered Systems and Neural Networks
2009-10-31 v1
Abstract
We model driven two-dimensional charge-density waves in random media via a modified Swift-Hohenberg equation, which includes both amplitude and phase fluctuations of the condensate. As the driving force is increased, we find that the defect density first increases and then decreases. Furthermore, we find switching phenomena, due to the formation of channels of dislocations. These results are in qualitative accord with recent dynamical x-ray scattering experiments by Ringlandet al. and transport experiments by Lemay et al.
Cite
@article{arxiv.cond-mat/9910297,
title = {Defects, order, and hysteresis in driven charge-density waves},
author = {Mikko Karttunen and Mikko Haataja and K. R. Elder and Martin Grant},
journal= {arXiv preprint arXiv:cond-mat/9910297},
year = {2009}
}
Comments
Accepted to Phys. Rev. Lett. Click here for "http://www-theory.mpip-mainz.mpg.de/~karttune/CDW/", movies of driven CDWs