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arXiv · 1105.2403

Conditions for non-monotonic vortex interaction in two-band superconductors

A. Chaves·L. Komendová·M. V. Milošević·J. S. Andrade Jr.·G. A. Farias·F. M. Peeters
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Abstract

We describe a semi-analytic approach to the two-band Ginzburg-Landau theory, which predicts the behavior of vortices in two-band superconductors. We show that the character of the short-range vortex-vortex interaction is determined by the sign of the normal domain - superconductor interface energy, in analogy with the conventional differentiation between type-I and type-II superconductors. However, we also show that the long-range interaction is determined by a modified Ginzburg-Landau parameter $κ^*$, different from the standard $κ$ of a bulk superconductor. This opens the possibility for non-monotonic vortex-vortex interaction, which is temperature-dependent, and can be further tuned by alterations of the material on the microscopic scale.

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A. Chaves, L. Komendová, M. V. Milošević, J. S. Andrade Jr., G. A. Farias, F. M. Peeters. 2011-05-12. Conditions for non-monotonic vortex interaction in two-band superconductors. https://doi.org/10.1103/physrevb.83.214523

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