Abstract
The dielectric functions of electron liquids which take into account short-range electron-electron correlations via the static local-field corrections are examined in the light of the frequency-moment sum rules. The formulation is given for degenerate as well as classical electron liquids in arbitrary ($d$) spatial dimensions, which is suitable for comparison between the two- and three-dimensional cases. By using the virial equations of state it is shown that such dielectric functions cannot satisfy the compressibility sum rule and the third-frequency-moment sum rule simultaneously. In the degenerate case, the plasmon, single-pair, and multipair contributions to the sum rules are analyzed, and the reason for this incompatibility is discussed.
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Publication Info
- Year
- 1984
- Type
- article
- Volume
- 30
- Issue
- 6
- Pages
- 3289-3304
- Citations
- 85
- Access
- Closed
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Identifiers
- DOI
- 10.1103/physreva.30.3289