Optical properties of the vibrations in charged C$_{60}$ molecules

Details Optical properties of the vibrations in charged C$_{60}$ molecules Optical properties of the vibrations in charged C$_{60}$ molecules

1995-12-04

arxiv.org/abs/cond-mat/9512020v1

Physics

Condensed Matter

10 pages, RevTeX3.0

Scientific paper

10.1103/PhysRevB.53.7002

The transition strengths for the four infrared-active vibrations of charged C$_{60}$ molecules are evaluated in self-consistent density functional theory using the local density approximation. The oscillator strengths for the second and fourth modes are strongly enhanced relative to the neutral C$_{60}$ molecule, in good agreement with the experimental observation of ``giant resonances'' for those two modes. Previous theory, based on a ``charged phonon'' model, predicted a quadratic dependence of the oscillator strength on doping, but this is not borne out in our calculations.

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