Electron interferometry with quantum Hall (QH) edge channels in semiconductor heterostructures can probe and harness the exchange statistics of anyonic excitations. However, the charging effects present in semiconductors often obscure the Aharonov–Bohm interference in QH interferometers and make advanced charge-screening strategies necessary. Here we show that high-mobility monolayer graphene constitutes an alternative material system, not affected by charging effects, for performing Fabry–Pérot QH interferometry in the integer QH regime. In devices equipped with gate-tunable quantum point contacts acting on the edge channels of the zeroth Landau level, we observe—in agreement with theory—high-visibility Aharonov–Bohm interference widely tunable through electrostatic gating or magnetic fields. A coherence length of 10 μm at a temperature of 0.02 K allows us to further achieve coherently coupled double Fabry–Pérot interferometry. In future, QH interferometry with graphene devices may enable investigations of anyonic excitations in fractional QH states.

半导体异质结构中量子霍尔 (QH) 边缘通道的电子干涉测量可以探测和利用任意子激发的交换统计数据。然而，半导体中存在的电荷效应常常掩盖 QH 干涉仪中的阿哈罗诺夫-玻姆干扰，因此需要先进的电荷筛选策略。在这里，我们证明高迁移率单层石墨烯构成了一种不受充电效应影响的替代材料系统，用于在整数 QH 范围内进行法布里-珀罗 QH 干涉测量。在配备作用于零朗道能级边缘通道的栅极可调量子点接触的器件中，我们观察到与理论一致的高可见度阿哈罗诺夫-玻姆干涉，可通过静电门控或磁场进行广泛调谐。 0.02 K 温度下 10 μm 的相干长度使我们能够进一步实现相干耦合双法布里-珀罗干涉测量。未来，石墨烯器件的 QH 干涉测量可能能够研究分数 QH 态的任意子激发。