Dynamical transport properties of NbSe3 with simultaneous sliding of both charge-density waves
Résumé
Measurements of the nonlinear conductivity in NbSe3 when the high-T and the low-T charge-density waves (CDWs) are simultaneously sliding have been performed. It is shown that the threshold electric field E-t1 for depinning the high-T CDW increases 4-5 times at the temperature at which the low-T CDW is formed, indicating the strong pinning effect resulting from the interaction between both CDWs. Under application of a radio-frequency (rf) field, Shapiro steps are never observed simultaneously for both CDWs. At the electric field less one than for high-T CDW sliding only Shapiro steps for low-T CDW were observed, and at higher field only Shapiro steps for high-T CDW exist
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