Defects, order, and hysteresis in driven charge-density waves

Details Defects, order, and hysteresis in driven charge-density waves Defects, order, and hysteresis in driven charge-density waves

1999-10-20

arxiv.org/abs/cond-mat/9910297v1

Phys. Rev. Lett. vol. 83, 3518-3521 (1999)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Accepted to Phys. Rev. Lett. Click here for "http://www-theory.mpip-mainz.mpg.de/~karttune/CDW/", movies of driven CDWs

Scientific paper

10.1103/PhysRevLett.83.3518

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.

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