摘要: The dynamic properties of sliding charge-density waves are discussed in terms a classical description impurity pinning, with emphasis on the behavior near threshold considered as critical phenomenon. A mean-field model introduced previously [Phys. Rev. Lett. 50, 1486 (1983)] is analyzed detail, including ac response above and below hysteretic threshold. For short-range interactions, weak-pinning limit scaling predicted earlier prediction noise intensity inversely proportional to square root volume diverging amplitude caused by correlation length behavior; this interpretation semiquantitatively confirmed recent experiments Mozurkewich Gr\"uner 51\ensuremath{\rightarrow}, 2206 (1983)]. Many ideas presented here may be applicable other systems, especially weakly pinned flux flow type-II superconductors.
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