Enhanced shot noise in tunneling through a stack of coupled quantum dots.
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.
Barthold
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Institut für Festkörperphysik, Universität Hannover, Appelstrasse 2, D-30167 Hannover, Germany. Barthold@nano.uni-hannover.de
Hohls
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Maire
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Pierz
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Haug
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