Vortex motion rectification in Josephson junction arrays with a ratchet potential.
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.
Shalóm
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Centro Atómico Bariloche, Comisión Nacional de Energía Atómica, Av. Bustillo 9500, R84002AGP S. C. de Bariloche, Argentina. shalom@cab.cnea.gov.ar
Pastoriza
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