“School of Nano-Sciences”

Back to Papers Home
Back to Papers of School of Nano-Sciences

Paper   IPM / Nano-Sciences / 12314
School of Nano Science
  Title:   Electronic transport of graphene nanoribbons within recursive Green's function
1.  Ali Asghar Shokri
2.  A. H . Mosavat
  Status:   Published
  Journal: Superlattices and Microstructures
  No.:  4
  Vol.:  51
  Year:  2012
  Pages:   10
  Publisher(s):   Elsevier Ltd.
  Supported by:  IPM
In this work, we introduce a recursive Green?s function method for investigating electronic transport in a graphene nanoribbons (GNRs) quantum wire with armchair (AGNR) and zigzag (ZGNR) edges which attached to two semi-infinite square lattice leads. This model reduces numerical calculations time and enables us to use Green?s function method to investigate transport in a supperlattice device. Therefore, we consider AGNR and ZGNR devices attached to metallic semi-infinite square lattice leads, taking into account the effects of longitudinal and wide of the wire. Our calculations are based on the tight-binding model, which the recursive Green?s function method is used to solve inhomogeneous differential equations. We concentrate on the electrical conductance and current for various length and wide size of the wire. Our numerical results show that the transport properties are strongly affected by the quantum interference effect and the lead interface geometry to the device. By controlling the type of contact and wire geometry, this kind of system can explain the antiresonance states at the Fermi energy. Our results can serve as a base for developments in designing nano-electronic devices.

Download TeX format
back to top
scroll left or right