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Article

Formation of bound vortex-antivortex pairs and their depinning in mesoscopic cross-film cryotrons

Aladyshkin A., Nefedov I., Aladyshkina A. S., Shereshevsky I.

We investigate numerically the formation of vortex–antivortex pairs in thin-film superconducting strip in the presence of a straight current-carrying wire, oriented perpendicular to this strip. We demonstrate that the change in the number of the trapped vortices/antivortices inside the strip near the current-carrying wire results in a oscillatory dependence of the critical current Ic on the magnitude of the control current Iw in the wire. We consider the effect of the width of the superconducting strip and the width of the control wire on the period and the amplitude of the dc-Josephson-like oscillations of the critical current.