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Critical and Non-Critical Channel in the Damping of Superconducting Fluctuations in Two-Band Systems

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Physical Properties of Nanosystems

Abstract

We investigate the damping of fluctuations of order parameters in a two-band model of superconductivity in dependence on intra- and interband interactions. The relevant free energy and kinetic equations have been derived. On the basis of these equations one can distinguish two different time scales in the relaxation of superconducting fluctuations. The considerable non-monotonic temperature dependence of the relaxation times has been established below the phase transition point. The behavior is caused by the certain competition between intra- and interband couplings and it allows one to estimate the ratio of these interactions.

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Acknowledgements

The work was supported by the Estonian Science Foundation grant N∘7296.

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Authors and Affiliations

  1. Institute of Physics, University of Tartu, Tähe 4, 51010, Tartu, Estonia

    T. Örd, K. Rägo & A. Vargunin

Authors
  1. T. Örd
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  2. K. Rägo
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  3. A. Vargunin
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Corresponding author

Correspondence to T. Örd .

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Editors and Affiliations

  1. Jožef Stefan Institute, Jadranska 19, Ljubljana, 1000, Slovenia

    Janez Bonca

  2. Theoretical Physics, Bogolyubov Institute for, Metrologichna 14 b14b, Kiev, 03680, Ukraine

    Sergei Kruchinin

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Örd, T., Rägo, K., Vargunin, A. (2011). Critical and Non-Critical Channel in the Damping of Superconducting Fluctuations in Two-Band Systems. In: Bonca, J., Kruchinin, S. (eds) Physical Properties of Nanosystems. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0044-4_14

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  • DOI: https://doi.org/10.1007/978-94-007-0044-4_14

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-007-0043-7

  • Online ISBN: 978-94-007-0044-4

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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