Graphene device measures fractional electron charges
EPFL researchers built a bilayer graphene antidot that acts as a sensitive charge meter, detecting quasiparticles with charges of one‑third, two‑thirds, and other fractions of an electron in various quantum Hall states. The device revealed one‑third and two‑thirds charges at state 8/3 and confirmed predictions for states 4/3, 5/3, 7/3, 2/3, and 3/5. This simple, tunable setup offers a practical method to study topological quantum matter.
EPFL researchers built a bilayer graphene antidot that acts as a sensitive charge meter, detecting quasiparticles with charges of one‑third, two‑thirds, and other fractions of an electron in various quantum Hall states. The device revealed one‑third and two‑thirds charges at state 8/3 and confirmed predictions for states 4/3, 5/3, 7/3, 2/3, and 3/5. This simple, tunable setup offers a practical method to study topological quantum matter.
It demonstrates a Swiss‑funded experimental platform that could support future AI‑driven research in quantum technologies.
Original source record. Open the original record to verify the underlying announcement.