High-Temperature Superconductivity in Lattice-Expanded C60

• Published in: Science (American Association for the Advancement of Science) Vol. 293; no. 5539; pp. 2432 - 2434
• Main Authors: Schön, J. H., Ch. Kloc, Batlogg, B.
• Format: Journal Article
• Language: English
• Published: Washington, DC American Society for the Advancement of Science 28-09-2001; American Association for the Advancement of Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystals; Doping; Electrons; Exact sciences and technology; Fullerenes and related materials; Hardness; Lattice parameters; Materials; Materials science; Molecules; Physics; Superconducting materials (excluding high-tc compounds); Superconductivity; Transition temperature; Temperature dependence; Coherence length; Electrical conductivity; Fullerene compounds; Hole density; Superconducting transitions; Electron-phonon interactions; Experimental study; Lattice parameters; Carrier density
• ISSN: 0036-8075; 1095-9203
• DOI: 10.1126/science.1064773

C60single crystals have been intercalated with CHCl3and CHBr3in order to expand the lattice. High densities of electrons and holes have been induced by gate doping in a field-effect transistor geometry. At low temperatures, the material turns superconducting with a maximum transition temperature of 117 K in hole-doped C60/CHBr3. The increasing spacing between the C60molecules follows the general trend of alkali metal-doped C60and suggests routes to even higher transition temperatures.