Accuracy of a density-wave theory for Coulomb solids

Physics – Condensed Matter

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Solid-Liquid Transitions, Phase Diagrams Of Metals And Alloys, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

The accuracy of a density-wave theory for Coulomb solids is examined in light of ``exact'' Monte Carlo data; a classical one-component plasma (OCP) and a binary ionic mixture (BIM) of carbon and oxygen are studied. For the OCP, the theory reproduces the solid free energy with excellent accuracy in a broad range of the Coulomb coupling parameter covering the crystallization conditions. For the BIM, we find local charge neutrality, which was not taken into account in previous calculations, plays a crucial role in describing the alloying nature; a phase diagram for the mixture is presented.

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