A new procedure for calculating the frequency- and wave-vector-dependent dielectric response function is described. It is based on decoupling and solving the equations of motion for the Green's functions of the charge-density operators by a moment-conserving method which is discussed. By use of this method an expression for the dielectric function in the static limit (omega -> 0) is obtained; it depends on a function G(k), for which numerical values are calculated and tabulated. Evidence that the procedure described here leads to reliable values of G(k) for small, intermediate, and large values of k is presented.

Calculation of the dielectric function for a degenerate electron gas with interactions. I. Static limit

TOIGO, FLAVIO;
1970

Abstract

A new procedure for calculating the frequency- and wave-vector-dependent dielectric response function is described. It is based on decoupling and solving the equations of motion for the Green's functions of the charge-density operators by a moment-conserving method which is discussed. By use of this method an expression for the dielectric function in the static limit (omega -> 0) is obtained; it depends on a function G(k), for which numerical values are calculated and tabulated. Evidence that the procedure described here leads to reliable values of G(k) for small, intermediate, and large values of k is presented.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2496673
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