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X-ray and UV valence band photoemission of carbon films

✍ Scribed by Calliari, L.; Laidani, N.; Speranza, G.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
165 KB
Volume
26
Category
Article
ISSN
0142-2421

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✦ Synopsis

The widely di †ering properties of amorphous carbon Ðlms originate from the di †erent s-p hybridization schemes possibly occurring in the C-C bond. For the study of such systems, an approach is suggested that provides direct access to these di †erent types of s-p hybridization via a separate mapping of the s and p partial density of states (DOS) contributing to the total valence band (VB) DOS in carbon materials. Both x-ray and UV-excited VB spectra are needed to this end : the dependence of photoionization cross-sections on photon energy in fact makes x-ray-excited VB photoemission essentially a probe of the s-DOS, and UV-excited VB photoemission essentially a probe of the p-DOS.

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