Multiplet Supercurrents in a Josephson Circuit
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Arnault, Ethan G. (ORCID:0000000293117624)↗
Engineering topics
Larson, Trevyn F. Q.
Publications and source records attributed to Larson, Trevyn F. Q..
Graphene-Based Quantum Hall Interferometer with Self-Aligned Side Gates
The vanishing band gap of graphene has long presented challenges for fabricating high-quality quantum point contacts (QPCs)–the partially transparent p-n interfaces introduced by conventional split-gates tend to short the QPC. This complication has hindered the fabrication of graphene quantum Hall Fabry-P'erot 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. Finally, 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.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗