Enhanced shot noise in tunneling through a stack of coupled quantum dots

P. Barthold, Frank Hohls, Niels Maire, Klaus Pierz & Rolf J. Haug
We have investigated the noise properties of the tunneling current through vertically coupled self-assembled InAs quantum dots. We observe super-Poissonian shot noise at low temperatures. For increased temperature this effect is suppressed. The super-Poissonian noise is explained by capacitive coupling between different stacks of quantum dots. © 2006 The American Physical Society.
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