Doubled Full Shot Noise in Quantum Coherent Superconductor - Semiconductor Junctions
arXiv:cond-mat/0208126 · doi:10.1103/PhysRevLett.90.067002
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.
published in Physical Review Letters