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Klein tunneling and cone transport in AA-stacked bilayer graphene

Journal Article


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Abstract


  • We investigate the quantum tunneling of electrons in an AA-stacked bilayer graphene (BLG) n-p junction and n-p-n junction. We show that Klein tunneling of an electron can occur in this system. The quasiparticles are not only chiral but are additionally described by a "cone index." Due to the orthogonality of states with different cone indexes, electron transport across a potential barrier must strictly conserve the cone index, and this leads to the protected cone transport which is unique in AA-stacked BLG. Together with the negative refraction of electrons, electrons residing in different cones can be spatially separated according to their cone index when transmitted across an n-p junction. This suggests the possibility of "cone-tronic" devices based on AA-stacked BLG. Finally, we calculate the junction conductance of the system.

Authors


  •   Sanderson, Matthew (external author)
  •   Ang, Yee Sin S. (external author)
  •   Chao Zhang

Publication Date


  • 2013

Citation


  • Sanderson, M., Ang, Y. & Zhang, C. (2013). Klein tunneling and cone transport in AA-stacked bilayer graphene. Physical Review B: Condensed Matter and Materials Physics, 88 (24), 245404-1-245404-9.

Scopus Eid


  • 2-s2.0-84890701014

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2751&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1742

Start Page


  • 245404-1

End Page


  • 245404-9

Volume


  • 88

Issue


  • 24

Abstract


  • We investigate the quantum tunneling of electrons in an AA-stacked bilayer graphene (BLG) n-p junction and n-p-n junction. We show that Klein tunneling of an electron can occur in this system. The quasiparticles are not only chiral but are additionally described by a "cone index." Due to the orthogonality of states with different cone indexes, electron transport across a potential barrier must strictly conserve the cone index, and this leads to the protected cone transport which is unique in AA-stacked BLG. Together with the negative refraction of electrons, electrons residing in different cones can be spatially separated according to their cone index when transmitted across an n-p junction. This suggests the possibility of "cone-tronic" devices based on AA-stacked BLG. Finally, we calculate the junction conductance of the system.

Authors


  •   Sanderson, Matthew (external author)
  •   Ang, Yee Sin S. (external author)
  •   Chao Zhang

Publication Date


  • 2013

Citation


  • Sanderson, M., Ang, Y. & Zhang, C. (2013). Klein tunneling and cone transport in AA-stacked bilayer graphene. Physical Review B: Condensed Matter and Materials Physics, 88 (24), 245404-1-245404-9.

Scopus Eid


  • 2-s2.0-84890701014

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2751&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1742

Start Page


  • 245404-1

End Page


  • 245404-9

Volume


  • 88

Issue


  • 24