Phase coherent transport in Kondo/superconducting hybrid structures

Details Phase coherent transport in Kondo/superconducting hybrid structures Phase coherent transport in Kondo/superconducting hybrid structures

2003-09-26

arxiv.org/abs/cond-mat/0309598v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We present measurements of the transport properties of hybrid structures consisting of a Kondo AuFe film and a superconducting Al film. The temperature dependence of the resistance indicates the existence of the superconducting proximity effect in the Kondo AuFe wires over the range of $\sim0.5$ $\mu$m. Electronic phase coherence in the Kondo AuFe wires has been confirmed by observing the Aharanov-Bohm effect in the magnetoresistance of the loop structure. The amplitude of the magnetoresistance oscillations shows a reentrant behavior with a maximum at $\sim$ 870 mK, which results from an interplay between the Kondo effect and the superconducting proximity effect.

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