Charge density wave transport in NbSe3 at low temperatures under high magnetic field
Yu. I. Latyshev, A. P. Orlov, P. Monceau+*
Kotelnikov Institute of Radio-Engineering and Electronics RAS, 125009 Moscow, Russia
+Neel Institute, CNRS, 38042 Grenoble, France
*Laboratoire National des Champs Magnetiques Intenses at Grenoble, CNRS, 38042 Grenoble, France
Abstract
Charge density wave (CDW) depinning and sliding regimes have been studied in
NbSe3 at low temperatures down to 1.5 K under magnetic field of 19 T
oriented along the c-axis. We found that the threshold field for CDW
depinning becomes temperature independent below K. Also CDW
current to frequency ratio characterizing CDW sliding regime increases by
factor 1.7 below this temperature. The results are discussed as a crossover from thermal
fluctuation to tunneling CDW depinning at T<T0. Besides, we found that CDW sliding strongly
suppresses the amplitude of Shubnikov-de Haas oscillations of magnetoresistance.