One-dimensional commensurability and conduction-band dispersion in heteroepitaxial C60 on GeS

The natural one-dimensional corrugation of the (001) cleavage plane of GeS, together with favorable lattice matching, allow the successful growth of oriented C 60 (111) fullerite layers, as evidenced by sharp low-energy electron diffraction patterns. k ∥-resolved inverse photoelectron spectroscopy reveals small dispersion effects in the conduction bands of epitaxial multilayers at 300 K. Enhanced dispersion bandwidths are observed at room temperature for one C 60 monolayer, indicating stronger bonding at the interface