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Single electron charging in parallel coupled quantum dots

✍ Scribed by A.S. Adourian; C. Livermore; R.M. Westervelt; K.L. Campman; A.C. Gossard

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
361 KB
Volume
20
Category
Article
ISSN
0749-6036

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✦ Synopsis

We report low-temperature conductance measurements in the Coulomb blockade regime on two nominally identical tunnel-coupled quantum dots in parallel defined electrostatically in the two-dimensional electron gas of a GaAs/AlGaAs heterostructure. At low interdot tunnel coupling we find that the conductance measured through one dot is sensitive to the charge state of the neighboring dot. At larger interdot coupling the conductance data reflect the role of quantum charge fluctuations between the dots. As the interdot conductance approaches 2e 2 / h, the coupled dots behave as a single large dot.

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