Fig. 1: The basic principle of the QH exciton and the experimental scheme.
From: Localizing individual exciton on a quantum Hall antidot
a A schematic showing the principle of the QH edge mode exciton formed by intralayer Coulomb interaction, and its comparison with the conventional exciton. The red and the blue arrowed circles correspond to the orbits of the electron and hole chiral edge modes. b Schematic showing the principle of the QH bilayer exciton, formed by interlayer Coulomb interaction. c A schematic of the sample consists of a heterostructure of patterned few-layer graphite (FLG) top gate, hBN, monolayer graphene (MLG), hBN, and FLG bottom gate. d QH edge modes on a graphene channel, including the bulk edge modes and the top gate-defined edge modes at the couplers and the antidot. The edge modes form at the boundaries of different filling factors. The red and blue arrowed lines correspond to the electron and hole-edge modes. The dotted arrows indicate where tunneling can happen.
