Making a Quantum Hall Interferometer Based on Marginally Rotated Graphene
The Quantum Hall Effect (QH) enables the exploitation of the quantum coherence of electrons for a wide range of applications from metrology to quantum computing. QH interferometry is a handy tool that provides an archetypal platform for achieving interwoven statistics of fractional QH states. However, the phase coherence along the interferometer and the suppression of the Coulomb filling energy are required to observe the fractional statistics. Study: Quantum Hall interferometry in the triangular domain of a marginally twisted bilayer graphene. Image Credit: Neon_dust/Shutterstock.com In an article recently published in the journal nano letter, The QH interferometer is based on a slightly twisted bilayer graphene with a twist angle (θ) of 0.16 degrees. Operation of the device in the QH regime results in unique magneto-thermopower features, including Aharonov–Bohm (AhB) and Fabry–Pérot (FP) oscillations in the magnetic-density field phase, where the Landau level fill factor (ν) is 4