“…As most of these techniques have been developed only very recently, the majority of SRO investigations discussed in the following were performed based on explicit DFT calculations. SRO has been observed in many CCMs, including (1) the famous Cantor alloy, CrMnFeCoNi, and some of its subsystems 37,66,67 , also with the addition of Al 68,69 , Cu 70 or Pd 71 ; (2) alloys of the refractory elements Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W 60,61,72-75 ; (3) more diverse combinations of elements, such as VCoNi 76 , Co-Fe-Ni-Ti 74,77 , Al-Cr-Fe-Ni-Ti 78 , AlNbTiV 79 , AlHfNbTaTiZr and their subsystems 54 ; and (4) multication ceramics with rocksalt 80 and pyrochlore 81 structures. Despite the abundance of observations, however, details of how this mechanism impacts CCMs are still not fully clear.…”