The temperature dependence of the surface resistivity for a metallic ${\mathrm{K}}_3{\mathrm{C}}_{60}$ ordered film in the nonsuperconducting state has been obtained by reflection electron energy loss spectroscopy. We demonstrate that the normal state electronic and transport properties of the top molecular layer of ${\mathrm{K}}_3{\mathrm{C}}_{60}$ are similar to the corresponding properties measured with bulk sensitive techniques. These observations strengthen and give a general character to the experimental results obtained with surface sensitive techniques on fullerene compounds. In addition, the transport properties may deviate from the Fermi-liquid behavior above 500 K.

• Received 26 January 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.076401