Vortex motion rectification in Josephson junction arrays with a ratchet potential
D. E. Shalom, H. Pastoriza
TL;DR
This study investigates how engineered ratchet potentials in Josephson junction arrays induce rectified vortex motion, revealing collective effects, current reversals, and the influence of vortex interactions through electrical transport measurements.
Contribution
It demonstrates the rectification of vortex motion in Josephson junction arrays with ratchet potentials and explores the effects of vortex density and interactions on this phenomenon.
Findings
Maximum rectified voltage near vortex matching conditions
Detection of vortex current reversals with varying force and density
Vortex interactions significantly influence the ratchet effect
Abstract
By means of electrical transport measurements we have studied the rectified motion of vortices in ratchet potentials engineered on over-damped 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 where detected varying the driving force and vortex density revealing the influence of vortex-vortex interaction in the ratchet effect.
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