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Electrostatic confinement of electrons in graphene nanoribbons

Xinglan Liu, Jeroen B. Oostinga, Alberto F. Morpurgo, and Lieven M. K. Vandersypen
Phys. Rev. B 80, 121407(R) – Published 28 September 2009
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Abstract

Coulomb blockade is observed in a graphene nanoribbon device with a top gate. When two pn junctions are formed via the back gate and the local top gate, electrons are confined between the pn junctions which act as the barriers. When no pn junctions are induced by the gate voltages, electrons are still confined, as a result of strong disorder, but in a larger area. Measurements on five other devices with different dimensions yield consistent results.

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  • Received 3 September 2009

DOI:https://doi.org/10.1103/PhysRevB.80.121407

©2009 American Physical Society

Authors & Affiliations

Xinglan Liu1, Jeroen B. Oostinga1,2, Alberto F. Morpurgo2, and Lieven M. K. Vandersypen1

  • 1Kavli Institute of NanoScience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands
  • 2DPMC and GAP, University of Geneva, 24 quai Ernest Ansermet, Geneva CH1211, Switzerland

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Issue

Vol. 80, Iss. 12 — 15 September 2009

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