Nonlocality in the density-functional description of bonding in ${\mathrm{Li}}_2$, ${\mathrm{N}}_2$, ${\mathrm{O}}_2$, and ${\mathrm{F}}_2$

The fully self-consistent implementation of the nonlocal-density functional of Langreth and Mehl has been used in conjunction with the augmented Gaussian method to calculate the potential-energy curves and dissociation energies of ${\mathrm{N}}_2$, ${\mathrm{Li}}_2$, ${\mathrm{O}}_2$, and ${\mathrm{F}}_2$. The nonlocal functional gives ground-state potential-energy curves in very good agreement with experiment. We compare these nonlocal results with other local-density calculations, and examine the effect of nonlocal-potential self-consistency on the dissociation energy.