Evidence for grain boundary hopping transport in polycrystalline diamond films
- 18 July 1994
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 65 (3) , 371-373
- https://doi.org/10.1063/1.112379
Abstract
We have investigated electrical transport in undoped diamondfilms prepared by chemical vapor deposition. Using an electrolytic decoration scheme we prove that currents flow predominantly on grain boundaries. From the temperature and the frequency dependencies we conclude that hopping transport takes place. The conductivity at different temperatures is shown to scale according to a universal curve from a random walk model.Keywords
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