text: − 
  
  model, where WK is larger in the NS for all Γ (see Fig. 
  In other words, the original MFLI model does not 
  4). 
  have the BCSI theory as its limiting case. 
  
  We modiﬁed the MFLI model is a minimal way by 
  Γ 
  changing the damping term in a SCS to 
  ω2+∆2 to be 
  consistent with BCSI model. We still use Eq. (18) for 
  the MFL term simply because this term was introduced 
  in the NS on phenomenological grounds and there is no 
  way to guess how it gets modiﬁed in the SCS state with- 
  
  √ 
  − 
  
  The results for the conductivity within a spin-fermion 
  model depend in quantitative (but not qualitative) way 
  on the assumption for the momentum dispersion of a col- 
  lective boson. This momentum dependence comes from 