Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe_0.942Ni_0.058)₂As₂: A Low-Temperature Specific-Heat Study

Figure 1

(a) The mapping image (color online) of Ni concentration throughout an area of 38 m × 28 m based on the EDS quantitative results. (b) The chart of the Ni distributions summarized from same data as (a).

(a)

(b)