Gate-Controlled Transmission of Quantum Hall Edge States in Bilayer Graphene

Jing Li, Hua Wen, Kenji Watanabe, Takashi Taniguchi, Jun Zhu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The edge states of the quantum Hall and fractional quantum Hall effect of a two-dimensional electron gas carry key information of the bulk excitations. Here we demonstrate gate-controlled transmission of edge states in bilayer graphene through a potential barrier with tunable height. The backscattering rate is continuously varied from 0 to close to 1, with fractional quantized values corresponding to the sequential complete backscattering of individual modes. Our experiments demonstrate the feasibility to controllably manipulate edge states in bilayer graphene, thus opening the door to more complex experiments.

Original languageEnglish (US)
Article number057701
JournalPhysical review letters
Volume120
Issue number5
DOIs
StatePublished - Jan 31 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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