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.
- Zhao, L; Arnault, EG; Larson, TFQ; Iftikhar, Z; Seredinski, A; Fleming, T; Watanabe, K; Taniguchi, T; Amet, F; Finkelstein, G
- December 2022
Volume / Issue
- 22 / 23
Start / End Page
- 9645 - 9651
Electronic International Standard Serial Number (EISSN)
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)