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Enhanced Shot Noise in Tunneling through a Stack of Coupled Quantum Dots

P. Barthold, F. Hohls, N. Maire, K. Pierz, R. J. Haug

cond-mat.mes-hallarXiv:cond-mat/0603512

Abstract

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.

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