Physical Review Letters
American Physical Society
The spectral momentum density of the valence band of an amorphous carbon film has been measured by (e, 2e) spectroscopy. Two "bands," energy as a function of momentum, are resolved. One extends from 23 eV below the Fermi energy to about 10 eV below EF. The other, ∼ 9 eV below EF, does not disperse significantly. Although the existence of diamond bonding in the film cannot be ruled out, the bands are more suggestive of the graphite band structure.
A. L. Ritter, JR Dennison, and R. Jones, "The Spectral Momentum Density of Amorphous Carbon from (e,2e) Spectroscopy," Phys. Rev. Lett. 53, 2054-2057 (1984).