Alloy supercell models were constructed using special quasirandom structures (SQS). The concept of SQS was developed to mimic random alloys without using very large supercells or using many configurations. The design of SQS involves a stochastic search over many possible configurations of local environments within a given supercell to best reproduce the pairwise correlation of a completely random alloy. An optimal SQS is the one that minimizes the root-mean-square deviation from the random pairwise correlation.