Requirements for an accurate dispersion-corrected density functional

Post-self-consistent dispersion corrections are now the norm when applying density-functional theory to systems where non-covalent interactions play an important role. However, there is a wide range of base functionals and available from which choose. In this work, we opine on most desirable requirements ensure that both functional correction, individually, as accurate possible for non-bonded repulsion attraction. The should be dispersionless, numerically stable, involve minimal delocalization error. Simultaneously, correction include finite damping, higher-order pairwise terms, electronic many-body effects. These criteria essential avoiding reliance error cancellation obtaining correct results physics.