Abstract
The structural and thermodynamic properties of liquid alkali metals near the melting point are presented. For this purpose, we use the thermodynamically self-consistent integral equation of the liquid state theory, called the hybridized mean-spherical approximation (HMSA). The effective interionic potential is derived via the second-order pseudopotential-perturbation method, in which the very recent pseudopotential of Fiolhais et al. [Phys. Rev. B 51, 14001 (1995)], designed for the solid state, is combined with our semianalytical local-field function [J. L. Bretonnet and M. Boulahbak, Phys. Rev. B 53, 6859 (1996)]. We show that this pseudopotential is transferable to the disordered environment characteristic of the liquid state and, if used with our local-field function, predicts the structural and thermodynamic properties of the liquid alkali metals with a reasonable accuracy.
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