Effects of short-range order on the electronic structure and optical properties of amorphous carbon

Xanthakis, JP

dc.contributor.author	Xanthakis, JP	en
dc.date.accessioned	2014-03-01T01:15:34Z
dc.date.available	2014-03-01T01:15:34Z
dc.date.issued	2000	en
dc.identifier.issn	0925-9635	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13602
dc.subject	amorphous carbon	en
dc.subject	electronic structure	en
dc.subject	optical properties	en
dc.subject	mobility gap	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	HYDROGENATED CARBON	en
dc.subject.other	FILMS	en
dc.subject.other	RESONANCE	en
dc.subject.other	EMISSION	en
dc.title	Effects of short-range order on the electronic structure and optical properties of amorphous carbon	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0925-9635(00)00255-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0925-9635(00)00255-7	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	We have calculated the joint density of states and absorption coefficient of amorphous carbon, a-C:H, treating it as a ternary alloy of sp(2) carbon, sp(3) carbon and hydrogen. These optical properties have been calculated in terms of the above compositions and a short-range order parameter determining the degree of clustering of the sp(2) (or sp(3)) carbon atoms. Our calculations show that this parameter has a significant effect on the Tauc gap, which seems to be considerably smaller than the mobility gap. By comparing, however, our theoretical values of the Tauc gap with experiments we deduce that the degree of clustering found in most real samples is very small. (C) 2000 Elsevier Science S.A. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	DIAMOND AND RELATED MATERIALS	en
dc.identifier.doi	10.1016/S0925-9635(00)00255-7	en
dc.identifier.isi	ISI:000087902300011	en
dc.identifier.volume	9	en
dc.identifier.issue	7	en
dc.identifier.spage	1369	en
dc.identifier.epage	1373	en