Mesoscopic cross-film cryotrons: Vortex trapping and dc-Josephson-like oscillations of the critical current

A. Yu. Aladyshkin; G. W. Ataklti; W. Gillijns; I. M. Nefedov; I. A. Shereshevsky; A. V. Silhanek; J. Van de Vondel; M. Kemmler; R. Kleiner; D. Koelle; V. V. Moshchalkov

doi:10.1103/physrevb.83.144509

arXiv · 1102.4545

Mesoscopic cross-film cryotrons: Vortex trapping and dc-Josephson-like oscillations of the critical current

A. Yu. Aladyshkin·G. W. Ataklti·W. Gillijns·I. M. Nefedov·I. A. Shereshevsky·A. V. Silhanek·J. Van de Vondel·M. Kemmler·R. Kleiner·D. Koelle·V. V. Moshchalkov

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Abstract

We investigate theoretically and experimentally the transport properties of a plain Al superconducting strip in the presence of a single straight current-carrying wire, oriented perpendicular to the superconducting strip. It is well known that the critical current of the superconducting strip, Ic, in such cryotron--like system can be tuned by changing the current in the control wire, Iw. We demonstrated that the discrete change in the number of the pinned vortices/antivortices inside the narrow and long strip nearby the current-carrying wire results in a peculiar oscillatory dependence of Ic on Iw.

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A. Yu. Aladyshkin, G. W. Ataklti, W. Gillijns, I. M. Nefedov, I. A. Shereshevsky, A. V. Silhanek, J. Van de Vondel, M. Kemmler, R. Kleiner, D. Koelle, V. V. Moshchalkov. 2011-02-22. Mesoscopic cross-film cryotrons: Vortex trapping and dc-Josephson-like oscillations of the critical current. https://doi.org/10.1103/physrevb.83.144509

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