Ionization potentials in the limit of large atomic number

Details Ionization potentials in the limit of large atomic number Ionization potentials in the limit of large atomic number

2010-06-16

arxiv.org/abs/1006.3251v1

Physics

Condensed Matter

Materials Science

4 pages, 5 figures

Scientific paper

By extrapolating the energies of non-relativistic atoms and their ions with up to 3000 electrons within Kohn-Sham density functional theory, we find that the ionization potential remains finite and increases across a row, even as $Z\rightarrow\infty$. The local density approximation becomes chemically accurate (and possibly exact) in some cases. Extended Thomas-Fermi theory matches the shell-average of both the ionization potential and density change. Exact results are given in the limit of weak electron-electron repulsion.

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