Abstract
The problem of including the many-electron interactions into a pseudopotential theory of aluminium is re-considered. It is shown that due to the valence-core exchange and correlation, the pseudopotential is necessarily non-linear in the valence-electron charge density. We propose a simple way to account for this non-linear effect. This improved valence-core exchange potential allows to give a unified theory of static, dynamic, and electronic properties of aluminium.
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