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Russian Physics Journal

, Volume 59, Issue 3, pp 456–465 | Cite as

Modeling of the Transport Properties of SNS Contacts for Strong Electron-Phonon Interactions

  • D. M. Sergeyev
Article

A modified expression for the Andreev reflection coefficient is derived taking into account strong electronphonon interactions. A dependence of the superconducting order parameter ∆σ is numerically modeled for magnesium diboride. The current-voltage characteristics and the dI/dV spectra of the dynamic conductivity of superconductor-normal metal-superconductor (SNS) contacts based on strongly coupled superconductors are calculated for the Averin–Bardas model using the modified Andreev reflection coefficient (on an example of magnesium diboride). Calculations are performed for the mode of high transparency (0.9–0.98). The special features of the SNS contacts based on strongly coupled superconductors are shown.

Keywords

superconductivity dynamic conductivity subharmonic gap structures Andreev reflection barrier transparency 

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Zhubanov Aktobe Regional State UniversityAktobeRepublic Kazakhstan
  2. 2.Military Institute of Air Defense ForcesAktobeRepublic Kazakhstan

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