Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-12-03
Phys. Rev. B 76, 212507 (2007)
Physics
Condensed Matter
Statistical Mechanics
5 pages, 4 figures. Accepted for publication in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.76.212507
A collective mechanism for current reversal in superconducting vortex
ratchets is proposed. The mechanism is based on a two-dimensional instability
of the ground state (T=0) of the system. We illustrate our results with
numerical simulations and experiments in Nb superconducting films fabricated on
top of Si substrates with artificially induced asymmetric pinning centers.
Anguita J. V.
Dinis Luis
Gonzalez Majorie E.
Parrondo Juan M. R.
Vicent J. L.
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