Electronic Transport phenomena in Graphene Nanoribbons

1
Electronic Transport phenomena in Graphene
Nanoribbons

• Quantum interference effects within coherent
  transport regime are investigated in Graphene
  Nanoribbons submitted to time-dependent external
  fields.

• AC potential is treated using Tien-Gordon theory
  and the differential conductance is obtained from
  generelized Landauer formalism written in terms
  of Green Functions
• First, we have to analyse the conductance
  interference patterns when Vac 0 (stationary
  regime)

Fabry-Perot oscillations obtained for an
armchair-edge (N14)
2
Electronic Transport phenomena in Graphene
Nanoribbons

• More complex diagrams can be generated
  considering long range interactions in the
  electronic structure of the Nanoribbons (3th
  nearest neighbours approximation)

S. Reich, et. al. PRB 66, 035412 (2002)?

• 3th nearest neighbours approximaton reveals
  additional features on the diagrams. More
  interesting effects may appear when the AC gating
  is applied.

Fabry-Perot oscillations obtained for an
armchair-edge (N14)