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Delocalization of quasiparticles in quasi-two-dimensional disordered superconductors with s-wave pairing

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  • Zhi-Jie Qin
  • Shi-Jie Xiong

Abstract

We investigate localization behavior of quasiparticles in disordered multi-plane superconductors with s-wave pairing. By introducing disorder with random site energies, the spatial fluctuations of Bogoliubov-de Gennes pairing potential are self-consistently determined. The size dependence of rescaled localization length for a long bar is calculated by using the transfer-matrix method. From the finite-size scaling analysis we show that there exists a critical point of the disorder strength W c which separates the extended and localized quasiparticle states in such quasi-two-dimensional systems. The associated critical behavior is studied and the relationship of the results to the number of planes is discussed. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Suggested Citation

  • Zhi-Jie Qin & Shi-Jie Xiong, 2005. "Delocalization of quasiparticles in quasi-two-dimensional disordered superconductors with s-wave pairing," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 46(3), pages 325-329, August.
  • Handle: RePEc:spr:eurphb:v:46:y:2005:i:3:p:325-329
    DOI: 10.1140/epjb/e2005-00256-6
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