Figure 1
From: ‘True’ bosonic coupling strength in strongly correlated superconductors
Schematic illustration of the energy-band renormalization.
The bare dispersion ε0(k) (black) is renormalized to εel-el(k) (red) through the electron-electron coupling. Afterwards, εel-el(k) is further renormalized to εtot(k) (blue) through the electron-boson coupling. The arrows indicate the magnitude of the real-part of the self-energies.
