Pair breaking and bound states in disordered superconductors

Chattopadhyay, A.K.; Klemm, R.A. and Sa, D. (2002). Pair breaking and bound states in disordered superconductors. Journal of Physics: Condensed Matter, 14 (31), L577-L582.

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.

Publication DOI: https://doi.org/10.1088/0953-8984/14/31/101
Divisions: Engineering & Applied Sciences > Mathematics
Engineering & Applied Sciences > Non-linearity and complexity research group
Uncontrolled 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
Published Date: 2002-08-12

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