Andreev scattering in nanoscopic junctions at high magnetic fields

Details Andreev scattering in nanoscopic junctions at high magnetic fields Andreev scattering in nanoscopic junctions at high magnetic fields

1999-07-16

arxiv.org/abs/cond-mat/9907236v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages

Scientific paper

10.1209/epl/i2000-00544-3

We report on the measurement of multiple Andreev resonances at atomic size point contacts between two superconducting nanostructures of Pb under magnetic fields higher than the bulk critical field, where superconductivity is restricted to a mesoscopic region near the contact. The small number of conduction channels in this type of contacts permits a quantitative comparison with theory through the whole field range. We discuss in detail the physical properties of our structure, in which the normal bulk electrodes induce a proximity effect into the mesoscopic superconducting part.

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