Abstract

The recent breakthrough in producing C₆₀ clusters^[1] opens up the possibility to investigate the optical properties of this fascinating new material. In this respect, it is of particular interest that C₆₀ clusters are found in a crystallized form (solid C₆₀). Recent band structure calculations^[2,3] show that solid C₆₀ is a semiconductor with a direct, but optically forbidden energy gap at the Brillouin-zone boundary.

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