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Aharonov–Bohm effect in graphene-based Fabry–Pérot quantum Hall interferometers

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Title
Aharonov–Bohm effect in graphene-based Fabry–Pérot quantum Hall interferometers
Author(s)
Ronen, Yuval; Werkmeister, Thomas; Haie Najafabadi, Danial; Pierce, Andrew T.; Anderson, Laurel E.; Shin, Young Jae; Si Young Lee; Young Hee Lee; Johnson, Bobae; Watanabe, Kenji; Taniguchi, Takashi; Yacoby, Amir; Kim, Philip
Publication Date
2021-02
Journal
Nature Nanotechnology
Publisher
Nature Research
Abstract
© 2021, The Author(s), under exclusive licence to Springer Nature Limited part of Springer Nature.Interferometers probe the wave-nature and exchange statistics of indistinguishable particles—for example, electrons in the chiral one-dimensional edge channels of the quantum Hall effect (QHE). Quantum point contacts can split and recombine these channels, enabling interference of charged particles. Such quantum Hall interferometers (QHIs) can unveil the exchange statistics of anyonic quasi-particles in the fractional quantum Hall effect (FQHE). Here, we present a fabrication technique for QHIs in van der Waals (vdW) materials and realize a tunable, graphene-based Fabry–Pérot (FP) QHI. The graphite-encapsulated architecture allows observation of FQHE at a magnetic field of 3T and precise partitioning of integer and fractional edge modes. We measure pure Aharonov–Bohm interference in the integer QHE, a major technical challenge in small FP interferometers, and find that edge modes exhibit high-visibility interference due to large velocities. Our results establish vdW heterostructures as a versatile alternative to GaAs-based interferometers for future experiments targeting anyonic quasi-particles.
URI
https://pr.ibs.re.kr/handle/8788114/9466
DOI
10.1038/s41565-021-00861-z
ISSN
1748-3387
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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