Pair breaking and bound states in disordered superconductors

A.K. Chattopadhyay, R.A. Klemm, D. Sa

Research output: Contribution to journalArticle

Abstract

We study the effects of inhomogeneous pairing interactions and impurities in short-coherence-length superconductors. Within the Born approximation, the effects of pairing disorder and magnetic impurities are identical. The T-matrices for pairing disorder sites with and without an impurity give rise to bound states within the BCS (Bardeen-Cooper-Schrieffer) gap, consistent with scanning tunnelling microscopy results on Bi2Sr2CaCu2O8+δ with Zn or Ni impurities.
Original languageEnglish
Pages (from-to)L577-L582
Number of pages6
JournalJournal of Physics: Condensed Matter
Volume14
Issue number31
Early online date24 Jul 2002
DOIs
Publication statusPublished - 12 Aug 2002

Keywords

  • approximation theory
  • bismuth compounds
  • additives doping
  • Eigenvalues and eigenfunctions
  • fermi level
  • hamiltonians
  • impurities
  • mathematical models
  • matrix algebra
  • parameter estimation
  • scanning tunneling microscopy
  • stoichiometry
  • vectors
  • magnetic impurities
  • oxide superconductors

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