If the Hellmann-Feynman theorem is applied to metals, using present-day Bloch-type functions, one finds a self-repulsion of the structure. A substantial concentration of electrons along the bonding directions is required if the self-repulsion is to be zero.
No takes yet. Share an insight, caveat, or question.
Wannier et al. (1969) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: