Graphene-Based Quantum Hall Interferometer with Self-Aligned Side Gates.
Nano Lett
; 22(23): 9645-9651, 2022 12 14.
Article
en En
| MEDLINE
| ID: mdl-36441587
ABSTRACT
The vanishing band gap of graphene has long presented challenges for making high-quality quantum point contacts (QPCs)âthe 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.
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MEDLINE
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Grafito
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En
Revista:
Nano Lett
Año:
2022
Tipo del documento:
Article
País de afiliación:
Estados Unidos