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≈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.
@article{arxiv.1208.1371,
title = {Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes},
author = {Yuma Okazaki and Satoshi Sasaki and Koji Muraki},
journal= {arXiv preprint arXiv:1208.1371},
year = {2013}
}