Journal
JOURNAL OF APPLIED PHYSICS
Volume 106, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3195045
Keywords
boron; diamond; insulating thin films; magnetoresistance
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Funding
- European Science Foundation (ESF)
- NES programme
- Methusalem Funding of the Flemish Government
- GOA [G.0430.07]
- FWO [G.0068.07]
- [IAP-P6/42]
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We report on the observation of a negative magnetoresistance (NMR) regime in boron-doped nanocrystalline diamond films at low temperatures. A comparative analysis of our experimental results and those reported for systems composed of superconducting granules embedded in an insulating matrix (also referred as granular films) suggest the presence of superconducting regions inside the insulating films as causing the NMR. By considering the latter scenario, the experimental observations are explained by modeling the systems as consisting of a distribution of superconducting granules whose global properties are tuned by the intergrain distance.
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