We propose a simple general-model pseudopotential, which is in good agreement with the real potential of metal ions, especially in the range q** 2&p # fitted while ^2, according to Eq. (4), can be found. Interaction between ions and conduction electrons in metals occurs through the central symmetric nonlocal pseudopotential w{r). 1 Sham 2 has indicated that the nonlocal pseudopotential can be replaced by an effective local potential having the advantage of considerably simplifying the computations. The aim of this work was to find a model local pseudopotential which could give good real-potential approximations for all simple metals.Considering the metal potential structure we have concluded that it would be interesting to unify the Coulomb potential which occurs due to the Ze core and the potential component which arises from the Pauli repulsion exerted by the bound electrons. We have found that the following mathematical form was the most suitable to describe the known potential structure, i.e., to favor the Coulomb component in the range of small wave numbers and, at the same time, to change it by further decreasing the oscillating potential in the range of large wave numbers:
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