Abstract
The non-ohmic conductive of NbSe3, presumed to arise from motion of the two charge-density waves q1, q2 which form at 144K and 59K respectively, has been measured as a function of applied field E in the temperature range 26K2 is confirmed, and it is shown further that a threshold exists also for depinning q1, and that below 50K the two waves become progressively locked together, and move as one at 30K and lower temperatures. Models of charge-density-wave motion are discussed.