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Multiple Andreev-reflection in asymmetric superconducting weak-links

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Zeitschrift für Physik B Condensed Matter

Abstract

The present paper is a continuation of [1], where we demonstrated the occurrence of multiple Andreev-reflection (AR) in symmetric Pb/n-InSb/Pb sandwich junctions. Here we are presenting the results of our investigations for the asymmetric configuration Pb/n-InSb/Sn. We discuss the measuredI(V)- anddV/dI(V)-characteristics in comparison with numerical calculations, which we carried out in a theoretical extension of the OTBK-theory [2,3] and a formulation given by W.M. van Huffelen et al. [4]. The main features in the characteristics are thesubharmonic gap structure (SGS) and anexcess current, which show interesting deviations from the symmetric situation. These deviations can be understood in a simple physical picture.

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Authors and Affiliations

  1. Physikalisches Institut der Universität, Am Hubland, D-97074, Würzburg, Germany

    U. Zimmermann, S. Abens & K. Keck

  2. B. Verkin Institute for Low Temperature Physics and Engineering, Academy of Sciences of the Ukraine, Lenin Av. 47, 310164, Kharkov, Ukraine

    D. Dikin & V. M. Dmitriev

Authors
  1. U. Zimmermann
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  2. S. Abens
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  3. D. Dikin
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  4. K. Keck
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  5. V. M. Dmitriev
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Zimmermann, U., Abens, S., Dikin, D. et al. Multiple Andreev-reflection in asymmetric superconducting weak-links. Z. Physik B - Condensed Matter 97, 59–66 (1995). https://doi.org/10.1007/BF01317588

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  • DOI: https://doi.org/10.1007/BF01317588

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