Dynamical exchange corrections to the di
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K.J. Hameeuw; F. Brosens; J.T. Devreese
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Article
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2003
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Elsevier Science
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English
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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 re