In situ direct-current conductance investigation of Cu/C₆₀ nano-scale granular films

The in situ direct-current conductance behaviors of Cu/C₆₀ nano-scale granular films have been investigated experimentally. The results show that the incorporation of Cu into C₆₀ greatly increases the conductance of the film. The orientational phase transition that exists in pure C₆₀ single crystals still retains in the Cu/C₆₀ coevaporated films, while the transition temperature range is significantly widened. The interactions between the nano-scale Cu clusters and C₆₀ grains are discussed.