Dynamical exchange corrections to the dielectric function in a two-dimensional electron gas |
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| Authors: | K.J. Hameeuw F. BrosensJ.T. Devreese |
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| Affiliation: | 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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