• 文献标题:   Edge channel confinement in a bilayer graphene n-p-n quantum dot
  • 文献类型:   Article
  • 作  者:   OVERWEG H, RICKHAUS P, EICH M, LEE Y, PISONI R, WATANABE K, TANIGUCHI T, IHN T, ENSSLIN K
  • 作者关键词:   quantum hall edge channel, bilayer graphene, quantum dot, pn junction
  • 出版物名称:   NEW JOURNAL OF PHYSICS
  • ISSN:   1367-2630
  • 通讯作者地址:   ETH
  • 被引频次:   2
  • DOI:   10.1088/1367-2630/aa9cd3
  • 出版年:   2018

▎ 摘  要

Wecombine electrostatic and magnetic confinement to define a quantum dot in bilayer graphene. The employed geometry couples n-doped reservoirs to a p-doped dot. At magnetic field values around B = 2 T, Coulomb blockade is observed. This demonstrates that the coupling of the copropagating modes at the p-n interface is weak enough to form a tunnel barrier, facilitating transport of single charge carriers onto the dot. This result may be of use for quantum Hall interferometry experiments.