Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions

Details Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions

2002-08-07

arxiv.org/abs/cond-mat/0208126v2

Phys. Rev. Lett. 90, 067002 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.90.067002

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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