A scaling law, which related the diffusion coefficient to the excess entropy of a liquid, was tested for several metals by using molecular dynamics simulations. Interatomic potentials were deduced by using the embedded atom method. The simulation results revealed various caveats concerning the proposed Dzugutov scaling law. For central forces and multi-body embedded atom method potentials, the scaling law was obeyed provided that the true excess entropy was used rather than the simple 2-body S2 approximation. Moreover, the scaling law was valid for embedded atom method binary mixtures, but a more general expression was required for the collision frequency.

Test of the Universal Scaling Law for the Diffusion Coefficient in Liquid Metals. Hoyt, J.J., Asta, M., Sadigh, B.: Physical Review Letters, 2000, 85[3], 594-7