Strong-Pinning Effects in Low-Temperature Creep: Charge-Density Waves in
- 10 February 1997
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (6) , 1098-1101
- https://doi.org/10.1103/physrevlett.78.1098
Abstract
Nonlinear conduction in the quasi-one dimensional conductor o-TaS_3 has been studied in the low-temperature region down to 30 mK. It was found that at temperatures below a few Kelvins the current-voltage (I-V) characteristics consist of several branches. The temperature evolution of the I-V curve proceeds through sequential freezing-out of the branches. The origin of each branch is attributed to a particular strong pinning impurity type. Similar behavior is expected for other physical systems with collective transport (spin-density waves, Wigner crystals, vortex lattices in type-II superconductors etc.) in the presence of strong pinning centers.Comment: 11 pages, 3 ps figures, Revtex, To be published in Phys. Rev. Letters (1997Keywords
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