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Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions

F. Lefloch·C. Hoffmann·M. Sanquer·D. Quirion
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Abstract

We performed low temperature shot noise measurements in Superconductor (TiN) - strongly disordered normal metal (heavily doped Si) weakly transparent junctions. We show that the conductance has a maximum due to coherent multiple reflections at low energy and that shot noise is then twice the Poisson noise (S=4eI). The shot noise changes to the normal value (S=2eI) due to a large quasiparticle contribution.

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F. Lefloch, C. Hoffmann, M. Sanquer, D. Quirion. 2003-02-18. Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions. https://doi.org/10.1103/physrevlett.90.067002

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