2001/11/10 by F. M. Marchetti, Francesca M. Marchetti, Benjamin D. Simons +1
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1088/0305-4470/35/19/302
published as J. Phys. A: Math. Gen. 35 (2002) 4201-4217 · 18 pages AMSLaTeX (with LaTeX2e), 6 eps figures
arxiv created 2001/11/10 · openalex publication_date 2002/05/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
When subject to a weak magnetic impurity distribution, the order parameter and quasi-particle energy gap of a weakly disordered bulk s-wave superconductor are suppressed. In the Born scattering limit, recent investigations have shown that ‘optimal fluctuations’ of the random impurity potential can lead to the nucleation of ‘domains’ of localized states within the gap region predicted by the conventional Abrikosov–Gor'kov mean-field theory, rendering the superconducting system gapless at any finite impurity concentration. By implementing a field theoretic scheme tailored to the weakly disordered system, the aim of the present paper is to extend this analysis to the consideration of magnetic impurities in the unitarity scattering limit. This investigation reveals that the qualitative behaviour is maintained while the density of states exhibits a rich structure.