EFFECTIVE INTERATOMIC INTERACTIONS IN LIQUID-METALS

Some liquid metals can be regarded as a binary mixture of ions and ele ctrons interacting via binary interparticle interactions with each oth er. It is shown exactly on the basis of the density-functional method that a liquid metal can be taken as a quasi one-component system only via a pairwise interatomic interaction (without a many-body force) to obtain the radial distribution function, provided that a liquid metal can be thought of as an ion-electron mixture with binary interactions.