Electronic Excitations and Stability of the Ground State of C60 Molecules

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A model study of the singlet excitons in the C60 molecule with emphasis on the Coulomb interaction between excited electron and hole leads to a physical understanding of the interaction effects on the absorption spectra and to a new identification of the forbidden excitons in the third-harmonic generation spectra. These conclusions may be tested experimentally on the model predictions related to the optical Kerr effect. The model shows that, with sufficiently strong interatomic than onsite interaction, a T_{2G} exciton could have very low energy or become unstable against the closed-shell ground state. Properties of these interesting cases beyond the C60 are briefly examined.
ReVTeX, 13 pages and 8 postscript figures

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/28426

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9807144
 http://arxiv.org/abs/cond-mat/9807144

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arXiv