Collective plasmon excitations in C60 clusters

The electromagnetic response function of a C60 cluster is calculated using linear-response theory. The valence electrons are quite delocalized and show collective excitations. In the low-energy part of the excitation spectrum, the lowest allowed transition at about 3 eV is strongly screened, and the...

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Veröffentlicht in:	Physical review letters 1991-11, Vol.67 (19), p.2690-2693
Hauptverfasser:	BERTSCH, G. F, BULGNAC, A, TOMANEK, D, WANG, Y
Format:	Artikel
Sprache:	eng
Schlagworte:	Collective effects Condensed matter: electronic structure, electrical, magnetic, and optical properties Electron states Exact sciences and technology Exchange, correlation, dielectric and magnetic functions, plasmons Physics
Online-Zugang:	Volltext
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Zusammenfassung:	The electromagnetic response function of a C60 cluster is calculated using linear-response theory. The valence electrons are quite delocalized and show collective excitations. In the low-energy part of the excitation spectrum, the lowest allowed transition at about 3 eV is strongly screened, and the other transitions below 6 eV are moderately screened, in agreement with experiment. A giant collective resonance is predicted at an unusually high energy of about 20 eV. (Author)
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.67.2690