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Influence of Disorder on Superconducting Correlations in Nanoparticles

  • M. D. Croitoru
  • A. A. Shanenko
  • A. Vagov
  • A. S. Vasenko
  • M. V. Milošević
  • V. M. Axt
  • F. M. Peeters
Original Paper

Abstract

We investigate how the interplay of quantum confinement and level broadening caused by disorder affects superconducting correlations in ultra-small metallic grains. We use the electron-phonon interaction-induced electron mass renormalization and the reduced static-path approximation of the BCS formalism to calculate the critical temperature as a function of the grain size. We show how the strong electron-impurity scattering additionally smears the peak structure in the electronic density of states of a metallic grain and imposes additional limits on the critical temperature under strong quantum confinement.

Keywords

Superconductivity Nanoscale Electron-phonon interaction 

Notes

Acknowledgments

This work was supported by the Belgian Science Policy (BELSPO Back to Belgium Grant), the Flemish Science Foundation (FWO-Vl), the Methusalem Foundation of the Flemish Government, TOPBOF-UA, and the bilateral project CNPq-FWO-Vl.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • M. D. Croitoru
    • 1
    • 2
  • A. A. Shanenko
    • 2
  • A. Vagov
    • 3
  • A. S. Vasenko
    • 4
  • M. V. Milošević
    • 1
  • V. M. Axt
    • 3
  • F. M. Peeters
    • 1
  1. 1.Departement FysicaUniversiteit AntwerpenAntwerpenBelgium
  2. 2.Universidade Federal de PernambucoPernambucoBrazil
  3. 3.Theoretische Physik IIIUniversität BayreuthBayreuthGermany
  4. 4.National Research University Higher School of EconomicsMoscowRussian Federation

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