Interface size dependence of the Josephson critical behaviour in pyrolytic graphite

Abstract

We have studied the transport properties of TEM lamellae obtained from a pyrolytic graphite sample with electrical contacts at the edges of the embedded interfaces. The temperature dependence of the resistance as well as the current-voltage characteristic curves are compatible with the existence of Josephson coupled superconducting regions. The transition temperature at which the Josephson behavior sets in, decreases with the interface width and vanishes for width below 200~nm. This unexpected behavior is apparently due to the influence of weak localization effects on the superconducting critical temperature.

5 pages with 4 figures

References in corpus (5)

• Bipolar supercurrent in graphene
• High-temperature interface superconductivity between metallic and insulating cuprates
• A quantum phase transition from triangular to stripe charge order in NbSe${}_2$
• Evidence of Josephson-coupled superconducting regions at the interfaces of Highly Oriented Pyrolytic Graphite
• Imaging Stacking Order in Few-Layer Graphene

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• Influence of surface band bending on a narrow band gap semiconductor: Tunneling atomic force studies of graphite with Bernal and rhombohedral stacking orders
• Electrical properties of in-plane-implanted graphite nanoribbons
• Graphite on graphite