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- Title
Percolation model of an insulator-conductor transition in ultrananocrystalline diamond films.
- Authors
Vlasov, I.; Kanzyuba, M.; Shiryaev, A.; Volkov, V.; Ral'chenko, V.; Konov, V.
- Abstract
A percolation model has been proposed to explain an insulator-conductor transition in ultrananocrystalline diamond films upon addition of nitrogen to a gas mixture used to synthesize films. An observed jump of the conductivity by 10-12 orders of magnitude is a result of the rearrangement of the structure of films leading to the formation of diamond nanorods in a graphite shell. A nitriding-induced increase in the volume fraction of these nanorods (up to 0.22) has been determined from small-angle X-ray scattering data. Conduction occurs through graphite shells and the percolation threshold corresponds to the volume fraction of conducting nanorods of 0.06.
- Subjects
PERCOLATION theory; PHASE transitions; DIAMOND films; NITROGEN as a test gas; NANORODS; X-ray scattering; DATA analysis
- Publication
JETP Letters, 2012, Vol 95, Issue 7, p391
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364012070090