Graphene-Based Quantum Hall Interferometer with Self-Aligned Side Gates.

Journal Article (Journal Article)

The vanishing band gap of graphene has long presented challenges for making high-quality quantum point contacts (QPCs)─the partially transparent p-n interfaces introduced by conventional split gates tend to short circuit the QPCs. This complication has hindered the fabrication of graphene quantum Hall Fabry-Pérot interferometers, until recent advances have allowed split-gate QPCs to operate utilizing the highly resistive ν = 0 state. Here, we present a simple recipe to fabricate QPCs by etching a narrow trench in the graphene sheet to separate the conducting channel from self-aligned graphene side gates. We demonstrate operation of the individual QPCs in the quantum Hall regime and further utilize these QPCs to create and study a quantum Hall interferometer.

Full Text

Duke Authors

Cited Authors

  • Zhao, L; Arnault, EG; Larson, TFQ; Iftikhar, Z; Seredinski, A; Fleming, T; Watanabe, K; Taniguchi, T; Amet, F; Finkelstein, G

Published Date

  • December 2022

Published In

Volume / Issue

  • 22 / 23

Start / End Page

  • 9645 - 9651

PubMed ID

  • 36441587

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

International Standard Serial Number (ISSN)

  • 1530-6984

Digital Object Identifier (DOI)

  • 10.1021/acs.nanolett.2c03805


  • eng