Electrostatic confinement of electrons in graphene nano-ribbons

Details Electrostatic confinement of electrons in graphene nano-ribbons Electrostatic confinement of electrons in graphene nano-ribbons

2008-12-21

arxiv.org/abs/0812.4038v2

Phys. Rev. B 80, 121407(R) (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 figures, 1 table, 4.4pages

Scientific paper

10.1103/PhysRevB.80.121407

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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