Dynamic Phases and the Peak Effect in Dirty Type II Superconductors
Anne van Otterlo, Richard T. Scalettar, Gergely T. Zimányi, Robert Olsson, Andra Petrean, Wai Kwok, Valerii Vinokur
DOI 10.1103/PhysRevLett.84.2493 · Physical Review Letters
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Abstract
We study numerically and experimentally the dynamics of driven vortex matter. Our London-Langevin simulations find that the critical current exhibits a peak both across the Bragg glass to vortex glass transition and across the melting line. The peak is accompanied by a clear crossing of the I−V curves. We report transport measurements on untwinned YBCO crystals, in complete accordance with these findings. At higher drives disorder is averaged to reduced values, and in three dimensions the vortices reorder into a “moving solid.” The effect of the disorder can be well represented with a “shaking temperature” which is inversely proportional to the velocity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.4 | Pressure unresolved | zero_resistance |
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