INFRARED-ABSORPTION OF POLARONS IN C-60

We consider infrared absorption in charged and photoexcited C60 using a Su-Schrieffer-Heeger model supplemented by a force field model to treat molecular vibrations. Intensities are calculated assuming the principal cause of absorption is the charged phonon effect. Our calculated frequencies for C60 and C60(-6) are in good agreement with experiment but the calculated intensities are at best in qualitative agreement. For photoexcited C60 and C60- the calculations indicate a number of additional infrared peaks which are in principle accessible to experiment.