Exchange contributions to the grand potential of a uniform electron gas at finite temperature

An approximation for the grand potential Ω( μ, T, V) of a uniform electron gas at finite temperature, based on a partial resummation of the many-body perturbation expansion, has been suggested by Rebei and Hitchon. Their sum of exchange contributions did not contain a T 2 ln T term in a low temperat...

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Bibliographic Details
Published in:Solid state communications 1999-01, Vol.113 (2), p.89-92
Main Authors: Geldart, D.J.W., Dunlap, E., Glasser, M.L.
Format: Article
Language:English
Subjects:
Collective effects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
D. Electron–electron interactions
D. Heat capacity
D. Thermodynamic properties
Electron states
Exact sciences and technology
Exchange, correlation, dielectric and magnetic functions, plasmons
Physics
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Summary:An approximation for the grand potential Ω( μ, T, V) of a uniform electron gas at finite temperature, based on a partial resummation of the many-body perturbation expansion, has been suggested by Rebei and Hitchon. Their sum of exchange contributions did not contain a T 2 ln T term in a low temperature expansion and seemed to remove unphysical behaviour usually associated with long range bare Coulomb interactions, without invoking correlation and screening effects. We find their conclusions to be incorrect.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(99)00444-5