Fig. 5: Plots of \({S}_{\alpha \alpha^{\prime} }^{(2)}({\bf{k}})\) for the AlxCrFeCoNi alloy around various high-symmetry lines of the irreducible Brillouin zone for fcc (top row) and bcc (bottom row) lattices.
\({S}_{\alpha \alpha^{\prime} }^{(2)}({\bf{k}})\) represents the lattice Fourier transform of an effective pair interaction between chemical species. The profile and relative sizes of of \({S}_{\alpha \alpha^{\prime} }^{(2)}({\bf{k}})\) indicate the likely strength and nature of pairwise atom-atom correlations in the solid solution. It can be seen that the introduction of Al to the system dramatically increases the strength of atom-atom correlations. Interactions are generally stronger when the underlying lattice is bcc compared to fcc.
