Short-range correlation in the uniform electron gas: Extended Overhauser model
Condensed Matter
2009-11-07 v1
Abstract
We use the two-electron wavefunctions (geminals) and the simple screened Coulomb potential proposed by Overhauser [Can. J. Phys. 73, 683 (1995)] to compute the pair-distribution function for a uniform electron gas. We find excellent agreement with Quantum Monte Carlo simulations in the short-range region, for a wide range of electron densities. We are thus able to estimate the value of the second-order coefficient of the small interelectronic-distance expansion of the pair-distribution function. The results are generalized to the partially polarized gas.
Cite
@article{arxiv.cond-mat/0107264,
title = {Short-range correlation in the uniform electron gas: Extended Overhauser model},
author = {Paola Gori-Giorgi and John P. Perdew},
journal= {arXiv preprint arXiv:cond-mat/0107264},
year = {2009}
}
Comments
9 pages, 5 figures. Accepted for publication in Phys. Rev. B