• 文献标题:   Klein Backscattering and Fabry-Perot Interference in Graphene Heterojunctions
  • 文献类型:   Article
  • 作  者:   SHYTOV AV, RUDNER MS, LEVITOV LS
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007
  • 通讯作者地址:   Univ Utah
  • 被引频次:   146
  • DOI:   10.1103/PhysRevLett.101.156804
  • 出版年:   2008

▎ 摘  要

We present a theory of quantum-coherent transport through a lateral p-n-p structure in graphene, which fully accounts for the interference of forward and backward scattering on the p-n interfaces. The backreflection amplitude changes sign at zero incidence angle because of the Klein phenomenon, adding a phase pi to the interference fringes. The contributions of the two p-n interfaces to the phase of the interference cancel with each other at zero magnetic field, but become imbalanced at a finite field. The resulting half-period shift in the Fabry-Perot fringe pattern, induced by a relatively weak magnetic field, can provide a clear signature of Klein scattering in graphene. This effect is shown to be robust in the presence of spatially inhomogeneous potential of moderate strength.