arXiv 0910.45762009-10-23cond-mat.mes-hallcond-mat.mtrl-scinucl-thphysics.atm-clus

中性和带电金属微团簇光吸收强度的碎裂

Fragmentation of the photoabsorption strength in neutral and charged metal microclusters

C. Yannouleas, R. A. Broglia, M. Brack, P. -F. Bortignon

备注：: This early (1989) jellium matrix-RPA/LDA (TDLDA in Fock space) study: 1) introduced the physics of spectral Landau-damping fragmentation for metal clusters; 2) explained the double line of the neutral Na_20; 3) predicted a 25% strength at high energies (recently seen experimentally); 4) predicted reduced fragmentation for cationic clusters (later seen experimentally);
发表信息：: Phys. Rev. Lett. 63, 255 (1989)
DOI：: 10.1103/PhysRevLett.63.255

摘要：

计算了中性和带电小团簇中等离子体共振的线形。在球形Na_8和Na_（20）中性团簇的光吸收截面中观察到的多峰结构的整体性质可以用朗道阻尼来理解。量子配置所示，发挥重要作用。在带电的Na ~（9+）和Na ~（21 ^+）团簇中，预计会出现一个携带大部分振子强度的单峰。

英文摘要：

The line shape of the plasma resonance in both neutral and charged small sodium clusters is calculated. The overall properties of the multipeak structure observed in the photoabsorption cross section of spherical Na_8 and Na_20 neutral clusters can be understood in terms of Landau damping. Quantal configurations are shown to play an important role. In the case of charged Na_9+ and Na_21^+ clusters a single peak is predicted that carries most of the oscillator strength.

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