Temporally Ordered Collective Creep and Dynamic Transition in the Charge-Density-Wave Conductor
- 4 October 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 83 (14) , 2793-2796
- https://doi.org/10.1103/physrevlett.83.2793
Abstract
We have observed an unusual form of creep at low temperatures in the charge-density-wave (CDW) conductor . This creep develops when CDW motion becomes limited by thermally activated phase advance past individual impurities, demonstrating the importance of local pinning and related short-length-scale dynamics. Unlike in vortex lattices, elastic collective dynamics on longer length scales results in temporally ordered motion and a finite threshold field. A first-order dynamic phase transition from creep to high-velocity sliding produces “switching” in the velocity-field characteristic.
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