J. Phys. IV France 12 (2002) Pr9-77
Modification of charge density wave fluctuations by charge perturbationsS.N. Artemenko
Institute for Radioengineering and Electronics of the Russian Academy of Sciences, 11-7 Mokhovaya Str., 101999 Moscow, Russia
Spectral density of fluctuations of the CDW phase are calculated taking into account electric field induced by phase fluctuations. The approach based upon the fluctuation-dissipation theorem (FDT) combined with equations of linear response of the CDW conductor is used. Fluctuating electric field is found to suppress fluctuations of the phase, while fluctuations of the electric potential are sizeable. This suggests that transition from the CDW to the normal state (which is usually observed well below the mean-field transition temperature) may he provoked by fluctuations of the chemical potential, rather than by destruction of the CDW coherence between conducting chains due to phase fluctuations.
© EDP Sciences 2002