Phys. Rev. B 50, 4878–4880 (1994)Out-of-phase noise in charge-density waves carrying ac currentReceived 22 April 1994; published in the issue dated 15 August 1994 In o-TaS3 and in NbSe3 doped with Ta, but not in undoped NbSe3, driving the charge-density wave with an ac current produced broad-band noise out of phase with the current. The cross spectrum between this out-of-phase noise and the in-phase noise is small, so the two noises do not represent different aspects of a single fluctuating parameter. The out-of-phase noise appears to represent fluctuations in the magnitude of the nonlinear dielectric behavior (the overshoot phenomenon) which, surprisingly, survive repeated resetting of the polarization. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.50.4878
DOI:
10.1103/PhysRevB.50.4878
PACS:
72.15.Nj, 72.70.+m, 05.40.+j
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