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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/11220

Title: Granular superconductivity in metallic and insulating nanocrystalline boron-doped diamond thin films
Authors: Willems, B
Zhang, G
Vanacken, J
Moshchalkov, V
JANSSENS, Stoffel
HAENEN, Ken
WAGNER, Patrick
Issue Date: 2010
Publisher: IOP PUBLISHING LTD
Citation: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 43(37)
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.
Notes: [Willems, B. L.; Zhang, G.; Vanacken, J.; Moshchalkov, V. V.] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3000 Louvain, Belgium. [Willems, B. L.] Univ Nacl Mayor San Marcos, Fac Ciencias Fis, Lima 14, Peru. [Janssens, S. D.; Haenen, K.; Wagner, P.] Hasselt Univ, Inst Mat Res, BE-3590 Diepenbeek, Belgium. [Haenen, K.; Wagner, P.] IMEC VZW, Div IMOMEC, BE-3590 Diepenbeek, Belgium. bramleo@hotmail.com
URI: http://hdl.handle.net/1942/11220
DOI: 10.1088/0022-3727/43/37/374019
ISI #: 000281544100020
ISSN: 0022-3727
Category: A1
Type: Journal Contribution
Validation: ecoom, 2011
Appears in Collections: Research publications

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