Physics – Condensed Matter
Scientific paper
1999-09-30
Phys. Rev. B 61, 7353 (2000)
Physics
Condensed Matter
14 pages, 5 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.61.7353
We propose a simple and accurate model for the electron static structure factors (and corresponding pair-correlation functions) of the 3D unpolarized homogeneous electron gas. Our spin-resolved pair-correlation function is built up with a combination of analytic constraints and fitting procedures to quantum Monte Carlo data, and, in comparison to previous attempts (i) fulfills more known integral and differential properties of the exact pair-correlation function, (ii) is analytic both in real and in reciprocal space, and (iii) accurately interpolates the newest, extensive diffusion-Monte Carlo data of Ortiz, Harris and Ballone [Phys. Rev. Lett. 82, 5317 (1999)]. This can be of interest for the study of electron correlations of real materials and for the construction of new exchange and correlation energy density functionals.
Bachelet Giovanni B.
Gori-Giorgi Paola
Sacchetti Francesco
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