中国物理B ›› 2019, Vol. 28 ›› Issue (12): 127203-127203.doi: 10.1088/1674-1056/ab55d3

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

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

Guan-Qun Zhang(张冠群), Li Lin(林立), Hailin Peng(彭海琳), Zhongfan Liu(刘忠范), Ning Kang(康宁), Hong-Qi Xu(徐洪起)   

  1. 1 Beijing Key Laboratory of Quantum Devices, Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China;
    2 Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
    3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  • 收稿日期:2019-09-23 修回日期:2019-10-30 出版日期:2019-12-05 发布日期:2019-12-05
  • 通讯作者: Ning Kang, Hong-Qi Xu E-mail:nkang@pku.edu.cn;hqxu@pku.edu.cn
  • 基金资助:

    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).

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

Guan-Qun Zhang(张冠群)1, Li Lin(林立)2, Hailin Peng(彭海琳)2, Zhongfan Liu(刘忠范)2, Ning Kang(康宁)1, Hong-Qi Xu(徐洪起)1,3   

  1. 1 Beijing Key Laboratory of Quantum Devices, Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China;
    2 Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
    3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  • Received:2019-09-23 Revised:2019-10-30 Online:2019-12-05 Published:2019-12-05
  • Contact: Ning Kang, Hong-Qi Xu E-mail:nkang@pku.edu.cn;hqxu@pku.edu.cn
  • Supported by:

    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).

摘要:

The electronic Fabry-Pérot interferometer operating in the quantum Hall regime may be a promising tool for probing edge state interferences and studying the non-Abelian statistics of fractionally charged quasiparticles. Here we report on realizing a quantum Hall Fabry-Pérot interferometer based on monolayer graphene. We observe resistance oscillations as a function of perpendicular magnetic field and gate voltage both on the electron and hole sides. Their Coulomb-dominated origin is revealed by the positive (negative) slope of the constant phase lines in the plane of magnetic field and gate voltage on the electron (hole) side. Our work demonstrates that the graphene interferometer is feasible and paves the way for the studies of edge state interferences since high-Landau-level and even denominator fractional quantum Hall states have been found in graphene.

关键词: graphene, electronic Fabry-Pérot interferometer, quantum Hall effect, edge state interference

Abstract:

The electronic Fabry-Pérot interferometer operating in the quantum Hall regime may be a promising tool for probing edge state interferences and studying the non-Abelian statistics of fractionally charged quasiparticles. Here we report on realizing a quantum Hall Fabry-Pérot interferometer based on monolayer graphene. We observe resistance oscillations as a function of perpendicular magnetic field and gate voltage both on the electron and hole sides. Their Coulomb-dominated origin is revealed by the positive (negative) slope of the constant phase lines in the plane of magnetic field and gate voltage on the electron (hole) side. Our work demonstrates that the graphene interferometer is feasible and paves the way for the studies of edge state interferences since high-Landau-level and even denominator fractional quantum Hall states have been found in graphene.

Key words: graphene, electronic Fabry-Pérot interferometer, quantum Hall effect, edge state interference

中图分类号:  (Electronic transport in graphene)

  • 72.80.Vp
73.23.-b (Electronic transport in mesoscopic systems) 73.43.-f (Quantum Hall effects) 85.35.Ds (Quantum interference devices)