Superconductivity

Abstract

A molecule of C60 discovered as a new type of carbon has high symmetry and a large hollow inside. The crystal forming from this molecule consists of five- and triple-fold degeneracy in the valence and the conduction band. Various exotic properties are expected from this molecule and its derived crystals. Actually, very intriguing metallicity and superconductivity with high critical temperature are observed in these 30 years, the latter of which surpasses the superconducting critical temperature of organic superconductors and beyond the limit of the conventional Bardeen-Cooper-Schrieffer (BCS) theory. In this chapter, the history and advancement of the C60 superconductivity is reviewed.