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Description:

We present a device architecture of hybrid-edge and dual-gated quantum point contact. We demonstrate improved electrostatic control over the separation, position, and coupling of each broken-symmetry compressible strip in graphene. Via low-temperature magneto-transport measurement, we demonstrate selective manipulation over the evolution, hybridization, and transmission of arbitrarily chosen quantum Hall states in the channel. With gate-tunable tunneling spectroscopy, we characterize the energy gap of each symmetry-broken quantum Hall state with high resolution on the order of ~0.1 meV.

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• In Copyright
  

  ©2025 American Physical Society

Keyword: Quantum point contact, Graphene, Quantum Hall states

Date published: 2023-12-22

Publisher: American Physical Society (APS)

Journal:

• Physical Review B (ISSN: 1550235X) vol. 108 issue. 24 245423

Funding:

• National Science Foundation 1922165
• National Science Foundation NSF-1944498
• Japan Society for the Promotion of Science 20H00354
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 23H02052
• Ministry of Education, Culture, Sports, Science and Technology

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevb.108.245423

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Updated at: 2025-08-27 16:30:26 +0900

Published on MDR: 2025-08-27 16:18:54 +0900