Fig. 5: Simulated temperature behavior of the critical current and calculated pair-correlation amplitudes as a function of the impurity potential.

In (a), normalized critical current I_c vs. temperature T curves simulated with the two-dimensional lattice model at fixed dimensions for three different impurity potential V_imp values: V_imp = 0.05 (green curve), V_imp = 0.23 (red curve), and V_imp = 0.3 (blue curve). Simulation parameters are reported in Supplementary Note 2. The current is normalized to the maximum of the current-phase relation at the lowest investigated temperature T, while T is normalized to the critical temperature T_c. In (b–d), calculated s-wave ensamble average of the pair amplitude 〈∣f∣〉 in arbitrary units for different impurity potential values V_imp in (a). In (e–g), calculated p-wave ensamble average of the pair amplitude 〈∣f∣〉 in arbitrary units for different impurity potential values V_imp in (a). f₀ is the spin-singlet component (black line and square symbols), f₃ is the opposite-spin triplet component (red line and circle symbols), f_↑(↓) is the up (down) equal-spin triplet component (blue lines and up-triangle symbols, and green lines and down-triangle symbols, respectively). Both s- and p-wave data are reported on a log scale.