Vortex Motion Rectification in Josephson Junction Arrays with a Ratchet Potential

D. E. Shalóm; H. Pastoriza

doi:10.1103/PhysRevLett.94.177001

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Vortex Motion Rectification in Josephson Junction Arrays with a Ratchet Potential

D. E. Shalóm, H. Pastoriza

DOI 10.1103/PhysRevLett.94.177001 · Physical Review Letters

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Abstract

By means of electrical transport measurements we have studied the rectified motion of vortices in ratchet potentials engineered on overdamped Josephson junction arrays. The rectified voltage as a function of the vortex density shows a maximum efficiency close a matching condition to the period of the ratchet potential indicating a collective vortex motion. Vortex current reversals were detected varying the driving force and vortex density revealing the influence of vortex-vortex interaction in the ratchet effect.

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