Figure 11: Sommerfeld constant calculated at several dopings.
From: Entropic Origin of Pseudogap Physics and a Mott-Slater Transition in Cuprates

x = 0 (red curve), 0.05 (violet), 0.08 (blue), 0.09 (green), 0.10 (brown), 0.15 (orange), 0.18 (light green), 0.20 (light blue), and 0.30 (magenta). Inset: Tγ vs doping.