Shot noise spectroscopy on a semiconductor quantum dot in the elastic   and inelastic cotunneling regimes
  We report shot noise spectroscopy on a semiconductor quantum dot in a cotunneling regime. The DC conductance measurements show clear signatures of both elastic and inelastic cotunneling transport inside a Coulomb diamond. We observed Poissonian shot noise with the Fano factor $F\approx 1$ in the elastic cotunneling regime, and super-Poissonian Fano factor $1<F<3$ in the inelastic cotunneling regime. The differences in the value of the Fano factor between elastic and inelastic processes reveal the microscopic mechanisms involved in the cotunneling transport. 
Yuma Okazaki, Satoshi Sasaki, and Koji Muraki
cond-mat.mes-hall