Moving Wigner Glasses and Smectics: Dynamics of Disordered Wigner Crystals

Abstract

We examine the dynamics of driven classical Wigner solids interacting with quenched disorder from charged impurities. For strong disorder, the initial motion is plastic -- in the form of crossing winding channels. For increasing drive, the disordered Wigner glass can reorder to a moving Wigner smectic -- with the electrons moving in non-crossing 1D channels. These different dynamic phases can be related to the conduction noise and I(V) curves. For strong disorder, we show criticality in the voltage onset just above depinning. We also obtain the dynamic phase diagram for driven Wigner solids and prove that there is a finite threshold for transverse sliding, recently found experimentally.

4 pages, 4 postscript figures

References in corpus (2)

• Nematic phase of the two-dimensional electron gas in a magnetic field
• Transverse depinning in strongly driven vortex lattices with disorder

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