F M Marchetti and B D Simons 2002 J. Phys. A: Math. Gen. 35 4201 doi:10.1088/0305-4470/35/19/302
F M Marchetti1,2 and B D Simons1
Show affiliationsWhen 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.
75.30.Hx Magnetic impurity interactions
74.40.+k Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
74.20.Rp Pairing symmetries (other than s-wave)
73.63.-b Electronic transport in nanoscale materials and structures
Issue 19 (17 May 2002)
Received 12 November 2001, in final form 21 March 2002
Published 3 May 2002
F M Marchetti and B D Simons 2002 J. Phys. A: Math. Gen. 35 4201
2002 J. Phys. A: Math. Gen. 35
A. Fasoli et al 2007 Nucl. Fusion 47 S264
G S Dhesi and R C Jones 1990 J. Phys. A: Math. Gen. 23 5577
N.N. Gorelenkov et al 2003 Nucl. Fusion 43 594
F M Marchetti and B D Simons 2001 J. Phys. A: Math. Gen. 34 10805
Y W Zhu et al 2005 Nanotechnology 16 88
Ting Yu et al 2005 Nanotechnology 16 1238
Elena Kazatchenko et al 2006 J. Geophys. Eng. 3 386
M Ross and J S Story 1949 Rep. Prog. Phys. 12 291