TY - JOUR
T1 - Granular superconductivity in metallic and insulating nanocrystalline boron-doped diamond thin films
AU - Willems, B. L.
AU - Zhang, G.
AU - Vanacken, J.
AU - Moshchalkov, V. V.
AU - Janssens, S. D.
AU - Haenen, K.
AU - Wagner, P.
PY - 2010/9/22
Y1 - 2010/9/22
N2 - 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. © 2010 IOP Publishing Ltd.
AB - 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. © 2010 IOP Publishing Ltd.
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U2 - 10.1088/0022-3727/43/37/374019
DO - 10.1088/0022-3727/43/37/374019
M3 - Article
SN - 0022-3727
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
ER -