Dynamical exchange corrections to the dielectric function in a two-dimensional electron gas |
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| Authors: | KJ Hameeuw F BrosensJT Devreese |
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| Institution: | Departement Natuurkunde, Universiteit Antwerpen (UIA), Universiteitsplein 1, 2610 Antwerpen, Belgium |
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| Abstract: | The effect of dynamical exchange interactions on the dielectric function of a two-dimensional electron gas is studied using a variational approach. Exchange effects are introduced via the local-field correction. The variationally obtained local-field factor is compared to the earlier perturbative result to first order in the electron-electron interaction. |
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| Keywords: | 77 22 Ch 71 45 Gm 77 55 +f |
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