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Thermal domains in inhomogeneous current-carrying superconductors. Current-voltage characteristics and dynamics of domain formation after current jumps

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Abstract

The static and dynamic behavior of thermal domains in inhomogeneous superconducting films, where the inhomogeneity behaves like a portion of the film with a reduced critical current, have been studied theoretically within the framework of the phenomenological approach, using the heat balance equation and the dependence of the superconductor critical current on temperature. Depending on the size of the inhomogeneity (local or extended) and on the relative values of parameters of the homogeneous and inhomogeneous regions, different types of current-voltage characteristics are obtained. The nonstationary problem of thermal domain formation near the inhomogeneity after a current jump has been solved, and the domain boundary (kink) dynamics at a distance from the inhomogeneity has been analyzed. A combination of the results allows one to describe the whole process of normal phase formation and its spread throughout the superconducting film.

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Authors and Affiliations

  1. Institute of Physics and Technology, Ukrainian Academy of Sciences, Kharkov, USSR

    A. I. Bezuglyj & V. A. Shklovskij

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  1. A. I. Bezuglyj
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  2. V. A. Shklovskij
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Bezuglyj, A.I., Shklovskij, V.A. Thermal domains in inhomogeneous current-carrying superconductors. Current-voltage characteristics and dynamics of domain formation after current jumps. J Low Temp Phys 57, 227–247 (1984). https://doi.org/10.1007/BF00681190

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  • DOI: https://doi.org/10.1007/BF00681190

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