The inhomogeneous-electron-gas theory of Hohenberg, Kohn, and Sham has been used to investigate the effects of nonlocal exchange and correlation on the Fermi surface of a simple cubic metal. The periodic lattice effects were represented by a realistic simple model pseudopotential. We find that the nonlocal terms substantially reduce the maximum Fermi-surface distortions, as experiments suggest.
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Rasolt et al. (1974) studied this question.
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