D. Dasgupta et al., THE ROLE OF PI AND PI-ASTERISK GAUSSIAN-LIKE DENSITY-OF-STATES BANDS IN THE INTERPRETATION OF THE PHYSICAL-PROPERTIES OF AC AND A-C-H FILMS, Journal of non-crystalline solids, 166, 1993, pp. 1147-1150
Many relevant properties of a-C and a-C:H films are due to the distrib
ution of pi and pi states. We assume pi and pi* bands to be gaussian
shaped, as a consequence of the different size of the graphitic-like i
slands and of their different abundances. We show that this assumption
allows most of the peculiar properties of a-C and a-C:H films to be u
nderstood.