Journal
PHYSICAL REVIEW LETTERS
Volume 122, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.146801
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Funding
- U.S. Department of Energy [DE-SC0012260]
- Army Research Office (ARO) Multidisciplinary University Research Initiative (MURI) [W911NF-14-1-0247]
- Gordon and Betty Moore Foundations EPiQS Initiative [GBMF4543]
- Elemental Strategy Initiative
- Japan Society for the Promotion of Science [262480621, 25106006]
- NSF [ECS-0335765]
- Semiconductor Research Corporations NRI Center for Institute for Nanoelectronics Discovery and Exploration (INDEX)
- U.S. Department of Energy (DOE) [DE-SC0012260] Funding Source: U.S. Department of Energy (DOE)
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We report tunneling transport in spatially controlled networks of quantum Hall (QH) edge states in bilayer graphene. By manipulating the separation, location, and spatial span of QH edge states via gate-defined electrostatics, we observe resonant tunneling between copropagating QH states across incompressible strips. Employing spectroscopic tunneling measurements and an analytical model, we characterize the energy gap, width, density of states, and compressibility of the QH edge states with high precision and sensitivity within the same device. The capability to engineer the QH edge network also provides an opportunity to build future quantum electronic devices with electrostatic manipulation of QH edge states, supported by rich underlying physics.
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