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Publication | Open Access

Tunable capacitive inter‐dot coupling in a bilayer graphene double quantum dot

DOIFull Paper Access

11

Citations

0

References

2011

Year

Stefan Fringes, Christian Volk, Bernat Terrés, Jan Dauber, Stephan Engels, Stefan Trellenkamp, Christoph Stampfer
Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics

Abstract

Abstract We report on a double quantum dot which is formed in a width‐modulated etched bilayer graphene nanoribbon. A number of lateral graphene gates enable us to tune the quantum dot energy levels and the tunneling barriers of the device over a wide energy range. Charge stability diagrams and in particular individual triple point pairs allow to study the tunable capacitive inter‐dot coupling energy as well as the spectrum of the electronic excited states on a number of individual triple points. We extract a mutual capacitive inter‐dot coupling in the range of 2–6 meV and an inter‐dot tunnel coupling on the order of 1.5 µeV. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)