C60 and Its Superconducting Properties

It was discovered a while ago that cage-shaped Fullerene C60 can be made superconductive by doping it with alkali metals. The highest Tc of the resulting materials is 33K, for the case of Cs2RbC60. The rather high Tc discovered in materials with such high symmetry came as a surprise. In these materials, the crystal structure and the superconducting parameter have an exceptional correlation: the critical temperatures are almost linearly dependent on the latticeconstants. Other physical properties, including the coherence length, superconductive energy gap and isotope effects, are discussed.