Proximity Effect in a Superconductor-Metallofullerene-Superconductor Molecular Junction

Details Proximity Effect in a Superconductor-Metallofullerene-Superconductor Molecular Junction Proximity Effect in a Superconductor-Metallofullerene-Superconductor Molecular Junction

2004-02-11

arxiv.org/abs/cond-mat/0402312v2

Phys. Rev. B 72, 033414 (2005)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures. Submitted to Phys.Rev.Lett

Scientific paper

10.1103/PhysRevB.72.033414

We report low-temperature transport measurements through molecules of Gd metallofullerenes between superconducting suspended electrodes. The presence and number of molecules in the 2 nm-wide gap between electrodes was determined by high resolution transmission electron microscopy. We find that a junction containing a single metallofullerene dimer between superconducting electrodes displays signs of proximity-induced superconductivity. In contrast, no proximity effects develops in junctions containing larger cluster of metallofulerenes. These results can be understood by taking into account multiple Andreev reflections, and the spin states of the Gd atoms.

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