Phys. Rev. Lett. 70, 3784–3787 (1993)Scaling near mode locking in a charge density wave conductorReceived 22 February 1993; published in the issue dated 14 June 1993 A striking evolution of the I-V curves is observed in a single sample (i.e., for a given realization of quenched disorder) of the charge density wave conductor NbSe3 in the presence of an external rf field of varying amplitude. This yields qualitatively different ‘‘depinning transitions’’ from the pinned and the mode-locked states. In some regimes the transition is apparently continuous and shows scaling behavior in agreement with some recent theoretical results. In other regimes the transition turns first order at both harmonic and subharmonic steps, but with a marked asymmetry. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.3784
DOI:
10.1103/PhysRevLett.70.3784
PACS:
72.15.Nj, 71.45.Lr
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