Analytical expressions for the local-field factor G(q) and the exchange-correlation kernel K_xc(r) of the homogeneous electron gas

1998/03/18 by Massimiliano Corradini, Rodolfo Del Sole, Giovanni Onida +1
Physics and Astronomy · #cond-mat

paper · pdf · doi:10.1103/physrevb.57.14569

RevTex, 2 PostScript figures

arxiv created 1998/03/18 · arxiv updated 2009/11/30

Abstract

We present an analytical expression for the local field factor G(q) of the homogeneous electron gas which reproduces recently published Quantum Monte--Carlo data by S. Moroni, D.M. Ceperley, and G. Senatore [Phys. Rev. Lett. 75, 689 (1995)], reflects the theoretically known asymptotic behaviours for both small and large q limits, and allows to express the exchange-correlation kernel K_xc analytically in both the direct and reciprocal spaces. The last property is particularly useful in numerical applications to real solids

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