Charge Transport and Superconducting Transitions in C60 Single Crystals and Thin Films Doped with Rubidium

Abstract
Superconductivity is confirmed in rubidium-doped C60 samples prepared from single crystals and thin films, by electrical resistivity measurements. Superconducting transition temperatures (T c) are observed at T c(onset)=30 K, T c(offset)=26 K, and T c(onset)=22 K, T c(offset)=2.5 K, respectively. The details of the doping conditions are described.