ABSTRACT
A statistical ensemble of electrons as an OCP constitutes a typical example of a charged Fermi liquid. Conduction electrons in metals are relatively low in density so that the exchange and Coulomb correlation effects tend to dominate the system properties over those arising from the kinetic energies in the Fermi distribution; such may therefore be looked upon as a strongly coupled quantum plasma. For an electron OCP, the average charge density is fixed at a value specified by the density of uniform neutralizing charges, the Helmholtz free energy is a thermodynamic potential appropriate for a description of such a system. The exchange-correlation free energy per particle and the excess pressure, both in the same energy units, are then calculated through the coupling-constant integrations. The exchange-correlation energies of electron gases at finite temperatures were evaluated in the static local-field approximation through solution to the set of STLS equations.
