Physics – Atomic and Molecular Clusters
Scientific paper
1998-06-16
S. K\"ummel, M. Brack, and P.-G.Reinhard, Phys. Rev.B 58, R 1774 (1998).
Physics
Atomic and Molecular Clusters
4 pages, 3 figures. Accepted for publication in PRB, tentatively July 15th, 1998 some typos corrected, brought to nicer format
Scientific paper
10.1103/PhysRevB.58.R1774
We present ground-state configurations and photoabsorption spectra of Na-7+, Na-27+ and Na-41+. Both the ionic structure and the photoabsorption spectra of medium-size sodium clusters beyond Na-20 have been calculated self-consistently with a nonspherical treatment of the valence electrons in density functional theory. We use a local pseudopotential that has been adjusted to experimental bulk properties and the atomic 3s level of sodium. Our studies have shown that both the ionic structure of the ground state and the positions of the plasmon resonances depend sensitively on the pseudopotential used in the calculation, which stresses the importance of its consistent use in both steps.
Brack Matthias
Kuemmel S.
Reinhard Paul-Gerhard
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