Abstract
Abstract In a previous publication1 we have shown that the model of the one-component classical plasma on an inert background (OCP) provides a basis for calculating the liquid structure factor of the alkali metals. This was achieved by allowing the conduction electrons to screen the structure of the OCP through the formalism of linear screening theory, but an empirical cut-off of the screening correction at the first node of the electron-ion pseudpotential in wavenumber space was found to be necessary. The purpose of this letter is to stress that the above results point the way towards an unconventional optimized-random-phase-approximation (ORPA) approach2 to the structure of these liquid metals, and in fact provide already a good first-order solution for such an approach.
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