Fig. 4: Superconducting gap fitting using an s± gap function.
From: Revealing the intrinsic superconducting gap anisotropy in surface-neutralized BaFe2(As0.7P0.3)2
a Schematic drawing of the Fermi surface of BaFe2(As0.7P0.3)2. The orbital characters of Fermi surface are illustrated using different colors14,17,18,39,40. b Plot of the superconducting gap (Δ) as a function of |coskxcosky|. c Angular distribution of the superconducting gap on the α pocket. The polar angle (θ) is defined in a. Panels d, e, and f are the same as c but taken on the δ, β, and η pockets, respectively. The black solid lines in all panels are the best fit using the gap function Δ0|coskxcosky| with Δ0 = 8.7 meV.
