Fig. 1: Ternary phase diagrams.
From: Disorder-induced universality and scaling in hole-doped iron-based superconductors
Ternary phase diagrams illustrating the doubly-substituted (Ba1−ySry)1−xNax and (Sr1−yCay)1−xNax samples selected for this study (indicated by crosses). Blue and red symbols represent the \({C}_{2M}^{{a}}\) and \({C}_{4M}^{c}\) phases, respectively. \({C}_{4M}^{{c}\max }\) samples are depicted by the white-highlighted dark-red spheres. Partially filled red and blue symbols denote samples that exhibit partial \({C}_{4M}^{c}\) phase characteristics. The color map highlights the approximate regions of the \({C}_{2M}^{{a}}\) (dark yellow), \({C}_{4M}^{c}\) (green), and superconducting (pink) phases. The narrow, dark pink bands flanking the green region indicate overlapping \({C}_{2M}^{{a}}\) and superconducting phases. The sodium content of the \({C}_{4M}^{{c}\max }\) samples ranges from 0.27 for the Ba1−xNax series to 0.44 in the Ca1−xNax series. Error bars are smaller than the symbol size.
