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Phys Rev Lett. 2006 Jun 23;96(24):246804. Epub 2006 Jun 21.

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

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  • 1Institut für Festkörperphysik, Universität Hannover, Appelstrasse 2, D-30167 Hannover, Germany.


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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