Optical response of small closed-shell sodium clusters

Details Optical response of small closed-shell sodium clusters Optical response of small closed-shell sodium clusters

2009-12-20

arxiv.org/abs/0912.4037v1

Physics

Condensed Matter

Materials Science

7 pages, 7 figures

Scientific paper

Absorption spectra of closed-shell Na_2, Na_3+, Na_4, Na_5+, Na_6, Na_7+, and Na_8 clusters are calculated using a recently implemented conserving linear response method. In the framework of a quasiparticle approach, we determine electron-hole correlations in the presence of an external field. The calculated results are in excellent agreement with experimental spectra, and some possible cluster geometries that occur in experiments are analyzed. The position and the broadening of the resonances in the spectra arise from a consistent treatment of the scattering and dephasing contributions in the linear response calculation. Comparison between the experimental and the theoretical results yields information about the cluster geometry, which is not accessible experimentally.

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