Abstract
AbstractThe specific heat of the electron gas is determined in the random phase approximation (RPA) using the Matsubara‐frequency summation technique which is well suited for calculating thermodynamic quantities up to relatively high degrees of degeneracy. A detailed discussion of the numerical problems is given. It is shown that widely used approximation schemes including the plasmonpole approximation (PPA) for the dielectric function are unsuitable calculating the specific heat with sufficient accuracy. The numerical evaluation shows in contradiction to previous calcutations that the specific heat ratio cv/cvid is larger than unity in the region of metallic densities.
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