• DOI:10.1103/PhysRevB.89.085426
• Corpus ID: 119114315

Tunable zero-energy transmission resonances in shifted graphene bilayer

@article{Daboussi2013TunableZT,
  title={Tunable zero-energy transmission resonances in shifted graphene bilayer},
  author={A. Daboussi and L. Mandhour and J N Fuchs and Sihem Jaziri},
  journal={Physical Review B},
  year={2013},
  volume={89},
  pages={085426}
}

• A. Daboussi, L. Mandhour, +1 author S. Jaziri
• Published 15 November 2013
• Physics
• Physical Review B

Laboratoire de Physique des Mat´eriaux, Facult´e des Sciences de Bizerte,Universit´e de Carthage, Jarzouna, 7021 Bizerte, Tunisie.(Dated: December 16, 2013)A graphene bilayer is known to perfectly reflect normally incident electrons due to their chiral-ity. This is similar to Klein tunneling, which, in a monolayer, is instead responsible for perfecttransmission at normal incidence. Stacking defaults turn each parabolic band crossing of a bilayerinto pairs of Dirac cones. Here we show that, surprisingly, a stacking default (or shift) in a bilayercan result in perfect transmission at normal incidence as a result of Fabry-P´erot type resonancesat zero-energy. These constructive interferences only happen for a specific orientation of the Diraccones with respect to the incident electron and for quantized values of their separation in reciprocalspace. Our results provide a way to control transmission resonances in undoped graphene bilayerstructure by adjusting the layer stacking.I. INTRODUCTION