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Thermal Rounding of the Charge Density Wave Depinning Transition

A. Alan Middleton
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Abstract

The rounding of the charge density wave depinning transition by thermal noise is examined. Hops by localized modes over small barriers trigger ``avalanches'', resulting in a creep velocity much larger than that expected from comparing thermal energies with typical barriers. For a field equal to the $T=0$ depinning field, the creep velocity is predicted to have a {\em power-law} dependence on the temperature $T$; numerical computations confirm this result. The predicted order of magnitude of the thermal rounding of the depinning transition is consistent with rounding seen in experiment.

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A. Alan Middleton. 1992-05-20. Thermal Rounding of the Charge Density Wave Depinning Transition. https://doi.org/10.1103/physrevb.45.9465

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