| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1554330 | Superlattices and Microstructures | 2009 | 7 Pages |
Abstract
Impedance spectroscopy of lightly nitrogenated ultrananocrystalline diamond films is investigated in the range 10Â mHz-10Â MHz at different temperatures between 115 K and 300 K. The electrical response was modeled alternatively by a series and a parallel equivalent scheme considering also the contribution of a resistance in series with the material's response. These schemes fairly agree with experimentally observed low-frequency data, but cannot completely explain trends observed at higher frequencies. Resonance effects were indeed evidenced due, probably, to the formation of a distributed junction at the interface between the p-type nanocrystalline diamond grain and the degenerate n-type connective tissue. The role of the series resistance is discussed and a physical model is proposed to justify the resonant behavior of the quality factor.
Related Topics
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Materials Science
Electronic, Optical and Magnetic Materials
Authors
M.C. Feliciangeli, M.C. Rossi, G. Conte, V. Ralchenko,