Coulomb-dominated oscillations in a graphene quantum Hall Fabry–Pérot interferometer*

Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300601 and 2017YFA0303304), the National Natural Science Foundation of China (Grant Nos. 11874071, 11774005, and 11974026), and Beijing Academy of Quantum Information Sciences, China (Grant No. Y18G22).

Zhang Guan-Qun1, Lin Li2, Peng Hailin2, Liu Zhongfan2, Kang Ning1, †, Xu Hong-Qi1, 3, ‡
       

Plots of RD in the BVL1&L2 plane, with back gate voltage VBG = −1 V near ν = −2. Note here the carrier type is hole. The negative slope of the constant phase lines indicates the device being in the CD regime (for electron carriers, negative slope represents Aharonov–Bohm interference). The magnetic field oscillation period ΔB ≈ 7.5 mT corresponds to an interference loop with area A ≈ 0.276 μm2 which has a mean radius of ∼ 300 nm.