Giant oscillations of energy levels in mesoscopic superconductors

ORAL

Abstract

The interplay of geometrical and Andreev quantization in mesoscopic superconductors leads to giant mesoscopic oscillations of energy levels as functions of the Fermi momentum and/or sample size. Quantization rules are formulated for closed quasiparticle trajectories in the presence of normal scattering at the sample boundaries. Two generic examples of mesoscopic systems are studied: (i) one dimensional Andreev states in a quantum box, (ii) a single vortex in a mesoscopic cylinder.

*supported, in part, by the US DOE Office of Science, contract No. W-31-109-ENG-38, by RFBR grant03-02-17402-a, by Program ``Quantum Macrophysics'' of RAS, byRussian Presidential Program grant MD-141.2003.02

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Authors

  • V. Vinokur

    • Argonne National Laboratory
    • Argonne National Laboratory, Argonne, IL

  • Nikolay Kopnin

    • Low Temperature Laboratory, Helsinki

  • Alexander Melnikov

  • Valentina Pozdnyakova

  • Denis Ryzhov

  • Igor Shereshevskii

    • Institute for Physics of Microstructures, Nizhny Novgorod, GSP-105, Russia