Electron correlations and moment sum rules

Pathak, K. N. ; Vashishta, P. (1973) Electron correlations and moment sum rules Physical Review B: Condensed Matter and Materials Physics, 7 (8). pp. 3649-3656. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v7/i8/p3649_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.7.3649


A theory of electron correlations based on a generalized random-phase approximation is presented. An expression for the local-field correction is obtained using the third frequency moment of the spectral function of the electron-density response function. The local field is a functional of the structure factor S(q→) which in turn is related to the imaginary part of the dielectric function via the fluctuation-dissipation theorem. The equations are self-consistently solved to determined S(q→) as originally suggested by Singwi et al. The pair-correlation function, compressibility, plasma dispersion, and correlation energy of electron liquid at metallic densities have been calculated.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:55992
Deposited On:22 Aug 2011 12:52
Last Modified:22 Aug 2011 12:52

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