title: A theoretical model of the photoabsorption spectra of carbon buckyonions.
abstract: A theoretical model has been developed to predict the photoabsorption spectra of spherical carbon buckyonions in the region dominated by the pi-plasmon feature. This model makes use of the microscopic electronic structure of the system, which is provided by an effective Huckel one-electron model. The important screening effects are treated within the random phase approximation, whose form is an extension to the dynamic case of the one derived in a previous work for the static polarizabilities of these species. A systematic analysis as a function of the buckyonion size is performed. We compare the spectra obtained in this way with those derived from a different representation of the electron motion, namely a two-dimensional spherical electron gas, and from a classical dielectric model.
authors.affiliation: Departamento de Fisica Fundamental II. Universidad de La Laguna, 38205 Tenerife, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Ruiz
authors.forename: J
authors.initials: J
authors.lastname: Breton
authors.forename: J M
authors.initials: JM
authors.lastname: Gomez Llorente