Pseudojellium model for metal clusters

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Abstract
We perform a comparative study of jellium and pseudojellium metallic clusters in the self-consistent spherical approximation. It is found that, while the predictions of both models generally coincide, there are some important differences between them. These differences relate mainly to the prediction of relative stability (fragmentation) of clusters of different sizes; we conclude that an accurate prediction of total cluster energies and surface energies is important for understanding these trends. The pseudojellium model is found to be an important improvement over the jellium model in this respect. A further improvement of the model is proposed, along the lines of recent work by Ekardt and Penzar.