Abstract
The Sn-doped C60 film was obtained by annealing a 100A˚thick C60 film with 6A˚thick Sn overlayer at 200°C. Photoelectron spectra show that the ration of Sn atoms to C60 molecules in the film is about 3:1. The valence band and C 1s core level spectra of the Sn-doped C60 film are similar to that of C60 film. In contrast with the expectation of the reported superconductive phase of Sn- doped C60, no metallic conduction band with a distinct Fermi level cutoff has been observed in the valence bands portion.
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