Electronic transport in locally gated graphene nanoconstrictions

We have developed the combination of an etching and deposition technique that enables the fabrication of locally gated graphene nanostructures of arbitrary design

Barbaros Özyilmaz; Pablo Jarillo-Herrero; Dmitri Efetov; Philip Kim

2007

Scholarcy highlights

  • We have developed the combination of an etching and deposition technique that enables the fabrication of locally gated graphene nanostructures of arbitrary design
  • A complete turn off of the device is demonstrated as a function of the local gate voltage
  • Such strong suppression of device conductance was found to be due to both quantum confinement and Coulomb blockade effects in the constricted graphene nanostructures
  • The unique “quasi-relativistic” carrier dynamics in graphene provides new transport phenomena ready to be explored for novel device applications
  • As an example we have studied graphene nanoconstrictions, where the transmission can be tuned by a local gate
  • We have demonstrated a simple approach for the fabrication and local gating of lithographically patterned graphene sheets into any planar geometry

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