Fig. 1
From: Microscopic origin of Cooper pairing in the iron-based superconductor Ba1−xKxFe2As2

Phase diagram and schematics of doping dependent Fermi surfaces in Ba1−xKxFe2As2. a The sampling points of the measurements are compiled in the phase diagram38 as blue and red dots deep in the superconducting state and slightly above Tc, respectively. b, c Schematic Brillouin zone and Fermi surface in the 1 Fe unit cell. With increasing hole-doping x the hole pockets (blue) grow and the electron pockets (red) shrink (changes exaggerated)