Title: Granular superconductivity in metallic and insulating nanocrystalline boron-doped diamond thin films
Authors: Willems, B. L ×
Zhang, Gufei
Vanacken, Johan
Moshchalkov, Victor
Janssens, S. D
Haenen, K
Wagner, Patrick Hermann #
Issue Date: 22-Sep-2010
Publisher: Iop publishing ltd
Series Title: Journal of physics d-applied physics vol:43 issue:37 pages:-
Article number: 374019
Abstract: The low-temperature electrical transport properties of nanocrystalline boron-doped diamond (b-NCD) thin films have been found to be strongly affected by the system's granularity. The important differences between the high and low-temperature behaviour are caused by the inhomogeneous nucleation of superconductivity in the samples. In this paper we will discuss the experimental data obtained on several b-NCD thin films, which were studied by either varying their thickness or boron concentration. It will be shown that the low-temperature properties are influenced by the b-NCD grain boundaries as well as by the appearance of an intrinsic granularity inside these granules. Moreover, superconducting effects have been found to be present even in insulating b-NCD films and are responsible for the negative magnetoresistance regime observed at low temperatures. On the other hand, the low-temperature electrical transport properties of b-NCD films show important similarities with those observed for granular superconductors.
ISSN: 0022-3727
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Soft Matter and Biophysics
× corresponding author
# (joint) last author

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