FIG. 1. Solid lines show ground-state HF results for jellium, compared to free-electron results in dotted lines. (rs/a0= 4, ε0F = k 2 F/2.) Top: Energy vs wave vector dispersion relation ε(k). The logarithmic divergence in the derivative, dε/dk , is marked with a triangle (N). Bottom: DOS, showing the unphysical zero at the Fermi level for jellium.
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