Doubled Full Shot Noise in Quantum Coherent Superconductor -   Semiconductor Junctions
  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. 
F. Lefloch, C. Hoffmann, M. Sanquer and D. Quirion