Correlated hybridization induced super-Poissonian noise in quantum dots
Transport through molecules or quantum dots is sensitive to not only the localized interactions on the conductor but also the hybridization to the external leads. In this study, we investigate the noise properties of a single level quantum dot with correlated hybridizations to the leads. In contrast to the featureless dot-lead coupling used in previous studies, we show that the correlated hybridization can give rise to the electron bunching in the transport. As a result, the noise Fano factor may be enhanced to super-Poissonian when the tunneling strength depends strongly on the electron number on the dot. This super-Poissonian noise appears at high bias voltage which enables the transfer of electrons via the doubly occupied state.