Single-particle spectrum of the degenerate electron gas |
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Authors: | B. I. Lundqvist |
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Affiliation: | (1) Institute of Theoretical Physics, Sven Hultins Gata, Gothenburg, Sweden |
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Abstract: | Extensive numerical results in the Random Phase Approximation are presented for the spectral weight function, the momentum distribution, and the density of states of the degenerate electron gas over a range of metallic densities. The single-particle spectrum contains not only the damped quasiparticle but also structure due to plasmon effects. At low momenta there is a second elementary excitation of appreciable weight. The density of states has a satellite band at energies more than the plasma energy below the Fermi level. The results confirm the main features of an earlier analysis using a simplified dielectric function. |
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