Figure 1 from Materials Design for New Superconductors

Phase diagrams (temperature versus chemical doping or pressure) for four

classes of superconductors: hole-doped cuprates like YBa2Cu3O6+x (upper left) [26],

κ-(ET)2Cu[N(CN)2]Cl, a 2D-organic (upper right) [27], heavy fermion CeRhIn5 (lower

left) [28], and an iron pnictide, Co-doped BaFe2As2 (lower right) [29].