• 文献标题:   Klein tunneling and cone transport in AA-stacked bilayer graphene
  • 文献类型:   Article
  • 作  者:   SANDERSON M, ANG YS, ZHANG C
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   Univ Wollongong
  • 被引频次:   23
  • DOI:   10.1103/PhysRevB.88.245404
  • 出版年:   2013

▎ 摘  要

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.