• 文献标题:   Transmission of phase information between electrons and holes in graphene
  • 文献类型:   Article
  • 作  者:   RAHMAN A, GUIKEMA JW, LEE SH, MARKOVIC N
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   Johns Hopkins Univ
  • 被引频次:   16
  • DOI:   10.1103/PhysRevB.87.081401
  • 出版年:   2013

▎ 摘  要

We have studied quantum interference between electrons and holes in a split-ring gold interferometer with graphene arms, one of which contained a pn junction. The carrier type, the pn junction, and the phase of the oscillations in a magnetic field were controlled by a top gate placed over one of the arms. We observe clear Aharonov-Bohm oscillations at the Dirac point and away from it, regardless of the carrier type in each arm. We also find clear oscillations when one arm of the interferometer contains a single pn junction, allowing us to study the interplay of the Aharonov-Bohm effect and Klein tunneling. DOI: 10.1103/PhysRevB.87.081401