Influence of artificial pinning on vortex lattice instability in superconducting films

A. V. Silhanek, A. Leo, G. Grimaldi, G. R. Berdiyorov, M. V. Milošević, A. Nigro, S. Pace, N. Verellen, W. Gillijns, V. Metlushko, B. Ilić, Xiaobin Zhu, V. V. Moshchalkov

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Abstract

In superconducting films under an applied dc current, we analyze experimentally and theoretically the influence of engineered pinning on the vortex velocity at which the flux-flow dissipation undergoes an abrupt transition from low to high resistance. We argue, based on a nonuniform distribution of vortex velocity in the sample, that in strongly disordered systems the mean critical vortex velocity for flux-flow instability (i) has a nonmonotonic dependence on magnetic field and (ii) decreases as the pinning strength is increased. These findings challenge the generally accepted microscopic model of Larkin and Ovchinnikov (1979 J. Low. Temp. Phys. 34 409) and all subsequent refinements of this model which ignore the presence of pinning centers.

Original languageEnglish
Article number053006
JournalNew Journal of Physics
Volume14
DOIs
Publication statusPublished - 1 May 2012

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Silhanek, A. V., Leo, A., Grimaldi, G., Berdiyorov, G. R., Milošević, M. V., Nigro, A., Pace, S., Verellen, N., Gillijns, W., Metlushko, V., Ilić, B., Zhu, X., & Moshchalkov, V. V. (2012). Influence of artificial pinning on vortex lattice instability in superconducting films. New Journal of Physics, 14, [053006]. https://doi.org/10.1088/1367-2630/14/5/053006