Fig. 4.

Conversion of electronic correlations. This figure summarizes the temperature evolution of the electron spectral weight A(k, ω) a, b and the electronic self-energy Σ(k, ω) c–f. c highlights the large low-energy Σ″ (incoherent scattering) that is present in the normal state, as indicated by the dashed oval. d shows that as the temperature is lowered into the superconducting state this low-energy incoherent scattering is undressed or gapped, i.e., the low-energy portion of Σ″ tends toward zero below the energy of the dashed line, along with a slight increase in Σ″ at higher energy (partial weight transfer). Among other things this creates the well-defined quasiparticle states in A(k, ω) at low energy of b. Causality requires that associated with this change in Σ″ is a change in Σ′, as observed in f and highlighted by the blue dashed oval. This shows up as the strong kink effect/mass renormalization in b. Hence, the large diffusive scattering above T _C is converted to a strong kink effect and mass renormalization—an effect that is much larger for the antinode than the node because the normal state diffusive scattering is much larger for the antinode than the for the node