Phys. Rev. Lett. 78, 1098–1101 (1997)Strong-Pinning Effects in Low-Temperature Creep: Charge-Density Waves in TaS3Received 19 January 1996; published in the issue dated 10 February 1997 Nonlinear conduction in the quasi-one-dimensional conductor o-TaS3 has been studied in the low-temperature region down to 30 mK. It was found that at temperatures below a few degrees Kelvin 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. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.1098
DOI:
10.1103/PhysRevLett.78.1098
PACS:
71.45.Lr, 72.15.Nj, 74.60.Ge, 75.30.Fv
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