Shot Noise Properties in a GaAs Small Quantum Dot

초록

This experiment provides a low-frequency shot noise properties of tunneling current performed in a GaAs quantum dot with a small number of confined electrons. The shot noise of current evaluates the temporal correlations between charge transfer events through a conductor. Fano factor described as the shot noise deviation from the Possonian value has proven to be a powerful tool to study transport in mesoscopic conductors. The elastic and inelastic cotunneling transports are evaluated by the conductance measurement and Fano factor analysis extracted from the noise measurement for the inside and the outside of Coulomb diamond region. Consequently, we demonstrate the variation of Fano factor based on our experimental results and explain the related physical phenomena in detail.