Core reconstruction in pseudopotential calculations

Details Core reconstruction in pseudopotential calculations Core reconstruction in pseudopotential calculations

2009-09-30

arxiv.org/abs/0909.5490v1

Phys. Rev. B 60, 7863 (1999)

Physics

Condensed Matter

Materials Science

14 pages, 5 figures

Scientific paper

A new method is presented for obtaining all-electron results from a pseudopotential calculation. This is achieved by carrying out a localised calculation in the region of an atomic nucleus using the embedding potential method of Inglesfield [J.Phys. C {\bf 14}, 3795 (1981)]. In this method the core region is \emph{reconstructed}, and none of the simplifying approximations (such as spherical symmetry of the charge density/potential or frozen core electrons) that previous solutions to this problem have required are made. The embedding method requires an accurate real space Green function, and an analysis of the errors introduced in constructing this from a set of numerical eigenstates is given. Results are presented for an all-electron reconstruction of bulk aluminium, for both the charge density and the density of states.

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