posted on 2023-01-09, 19:35authored byHailong Fu, Ke Huang, Kenji Watanabe, Takashi Taniguchi, Morteza Kayyalha, Jun Zhu
Bernal-stacked
bilayer graphene exhibits a wealth of interaction-driven
phenomena, including robust even-denominator fractional quantum Hall
states. We construct Fabry–Pérot interferometers using
a split-gate design and present measurements of the Aharonov–Bohm
oscillations. The edge state velocity is found to be approximately
6 × 104 m/s at filling factor ν = 2 and decreases
with increasing filling factor. The dc bias and temperature dependence
of the interference point to electron–electron interaction
induced decoherence mechanisms. These results pave the way for the
quest of fractional and non-Abelian braiding statistics in this promising
device platform.