Two potential functions, termed V2 and Veff, were derived from phonon dispersion curves. The V2 function was fitted to phonon frequencies without considering possible multi-ion effects, while Veff was constructed by including dominant multi-ion interactions in the potential. It was found that V2 was in relatively close agreement with more fundamental potentials at short distances, whereas Veff appeared to give a slightly better representation of the long-range interactions. Both of the potentials were used to calculate the energies of intrinsic and extrinsic stacking faults. This gave the reasonable results of 30 and 35mJ/m2 for intrinsic and extrinsic faults, respectively.

Interatomic Pair Potential for Copper - Calculation of Stacking Fault Energy. R.H.Rautioaho: Physica Status Solidi B, 1982, 112[2], 391-8