Half-quantized Hall Plateaus in the Confined Geometry of Graphene
Researchers observed half-quantized quantum Hall plateaus at $\nu_H = 5/2$ in monolayer graphene confined by a Hall bar geometry. This phenomenon occurs via charge equilibration between different edge states, manifesting in two distinct transport regimes: 'Ordinary' tunneling and 'Out-of-Ordinary' contacts. The findings suggest charge equilibration drives these exotic, tunable states.