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The intrinsic line width of the plasmon resonances in metal microclusters at very low temperatures: quantal surface fluctuations |
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| Authors: | J. M. Pacheco R. A. Broglia B. R. Mottelson |
| Affiliation: | 1. The Niels Bohr Institute, University of Copenhagen, DK-2100, Copenhagen ?, Denmark 2. Dipartimento di Fisica, Universitá di Milano, Via Celoria 16 and INFN Sez. Milano, I-20133, Milano, Italy 3. Nordita, DK-2100, Copenhagen ?, Denmark |
| Abstract: | The line shape of the plasmon resonance in a cold, small sodium cluster (Na8) is calculated taking into account its coupling to the quantal quadrupole fluctuations of the cluster shape. This coupling is found to give rise to a small damping factor (Γ/?ω1～0.03, where ?ω1 denotes the energy centroid and Γ the full width at half maximum of the resonance), and to an asymmetric line shape with Gaussian behaviour in the wings. |
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