Analytical expressions for the charge-charge local-field factor and the exchange-correlation kernel of a two-dimensional electron gas - art. no. 153101

Authors
Davoudi, B Polini, M Giuliani, GR Tosi, MP
Citation
B. Davoudi et al., Analytical expressions for the charge-charge local-field factor and the exchange-correlation kernel of a two-dimensional electron gas - art. no. 153101, PHYS REV B, 6415(15), 2001, pp. 3101
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6415
Issue
15
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011015)6415:15<3101:AEFTCL>2.0.ZU;2-7
Abstract
We present an analytical expression for the static many-body local field fa ctor G(divided by)(q) of a homogeneous two-dimensional electron gas, which reproduces diffusion Monte Carlo data and embodies the exact asymptotic beh aviors at both small and large wave number q. This allows us to also provid e a closed-form expression for the exchange and correlation kernel K-xc(r), which represents a key input for density functional studies of inhomogenou s systems.