Ground-state properties of ${\mathrm{Ag}}_2$: A local-density pseudopotential approach

The local-density approximation of the density-functional theory is applied to calculate the ground-state properties of ${\mathrm{Ag}}_2$, within the framework of the pseudopotential method. The calculated values of the bond length and the harmonic vibrational frequency are in good agreement with experiment. The bonding properties are found to be influenced by the $d$-electron states in a significant way. The results are compared with those of configuration-interaction calculations.