Answers are grounded in this paper and cite their sources.
It is shown that an orbital-polarization correction to a spin-polarized band-structure calculation leads to an insulating gap for CoO, in sharp contrast to a standard band calculation. Orbital-polarization instabilities, though, are not found for FeO and La₂{CuO}₄$.
No takes yet. Share an insight, caveat, or question.
M. R. Norman (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: