Influence of the Friedel oscillations on the structure on liquid rubidium

Abstract

Recent experimental results on liquid rubidium have demonstrated agreement between derivatives of the structure factor with respect to density and momentum transfer as predicted by the uniform fluid model. Using a selection of model fluids (the hard-sphere fluid, the Yukawa fluid and a simplified model of liquid metals), each of which is solvable analytically within the mean spherical approximation, the authors present evidence that the observed experimental behaviour could be explained in terms of the density-dependent Friedel oscillations in the effective inter-ion potential for rubidium.