Argon force field revisited: a molecular dynamic study

We report the improvement of five argon force fields by scaling Lennard-Jones energy ($ϵ$) and distance ($\sigma$) parameters to reproduce liquid-vapor phase diagram and surface tension simultaneously, with molecular dynamics. Original force fields reproduce only liquid-vapor phase diagram among other properties except surface tension. Results showed that all force fields converge in a nearby region in the $ϵ$-$\sigma$ phase space, which is different from the original values. This study gives the intervals where the numerical values of $ϵ$ and $\sigma$ reproduce both properties mentioned above.