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Andreev-type states induced by quantum confinement

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Abstract

The properties of a clean superconductor with nanoscale dimensions are governed by quantum confinement of the electrons. This results in a spatially inhomogeneous superconducting condensate and in the formation of new Andreev-type quasiparticle states. These states are mainly located beyond regions where the superconducting condensate is enhanced. A numerical self-consistent solution of the Bogoliubov-de Gennes equations for a cylindrical metallic nanowire shows that these new Andreev-type states decrease the ratio of the energy gap to the critical temperature.

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Authors and Affiliations

  1. TGM, Departement Fysica, Universiteit Antwerpen, Antwerpen, Belgium

    A. A. Shanenko & F. M. Peeters

  2. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russia

    A. A. Shanenko

  3. EMAT, Departement Fysica, Universiteit Antwerpen, Antwerpen, Belgium

    M. D. Croitoru

  4. School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel

    R. G. Mints

Authors
  1. A. A. Shanenko
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  2. M. D. Croitoru
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  3. R. G. Mints
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  4. F. M. Peeters
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The text was submitted by the authors in English.

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Shanenko, A.A., Croitoru, M.D., Mints, R.G. et al. Andreev-type states induced by quantum confinement. J. Surf. Investig. 2, 611–615 (2008). https://doi.org/10.1134/S1027451008040216

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  • DOI: https://doi.org/10.1134/S1027451008040216

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