Graphene-Based Quantum Hall Interferometer with Self-Aligned Side Gates
- Duke Univ., Durham, NC (United States)
- Appalachian State University, Boone, NC (United States)
- National Institute for Materials Science (NIMS), Tsukuba (Japan)
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.
- Research Organization:
- Duke Univ., Durham, NC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF); Japan Ministry of Education, Science, Sports and Culture (MEXT); Japan Society for the Promotion of Science (JSPS) (KAKENHI)
- Grant/Contract Number:
- SC0002765; DMR-2004870; JPMXP0112101001; JP20H00354; JPMJCR15F3; ECCS-1542015
- OSTI ID:
- 1994761
- Journal Information:
- Nano Letters, Vol. 22, Issue 23; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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