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.
@article{arxiv.cond-mat/9612247,
title = {Strong-Pinning Effects in Low-Temperature Creep: Charge-Density Waves in TaS_3},
author = {S. V. Zaitsev-Zotov and G. Remenyi and P. Monceau},
journal= {arXiv preprint arXiv:cond-mat/9612247},
year = {2016}
}
Comments
11 pages, 3 ps figures, Revtex, To be published in Phys. Rev. Letters (1997)