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Paper   IPM / Physic / 12792
School of Physics
  Title:   Electronic Structure and Layer-Resolved Transmission of Strained Bilayer Graphene in the Presence of Vertical Fields
1.  H. Rostami
2.  R. Asgari
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  88
  Year:  2013
  Pages:   035404
  Supported by:  IPM
The electronic properties of bilayer graphene are distinct from both the conventional two dimensional electron gas and monolayer graphene due to the special chiral properties and excitation charge carrier dispersions. We demonstrate a valley polarized quantum Hall effect in biased bilayer graphene when the system is subjected to a perpendicular magnetic field. In the system a topological phase transition from quantum valley Hall to valley polarization quantum Hall phase and that to a trivial insulator phase can be occurred by tuning vertical stain. Besides, we study the layer-resolved transport properties by calculating layer polarization quantity within recursive Green's function technique. These predictions can be verified by experiments and our results show possible exploiting strained bilayer graphene in the presence of external fields for electronics and valleytronics devices.

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