3/2 fractional quantum Hall plateau in a single layer two-dimensional electron gas

ORAL

Abstract

In a single layer two-dimensional electron gas, we observed a new even-denominator fractional quantum Hall plateau quantized at (h/e^2 )/(3/2) under confinement, at a bulk filling factor of 5/3. This unexpected plateau develops below 300 mK with a quantization of 0.02%. The conductance transmitting through the confined region is also quantized at 3/2 e^2/h, and the conductance of 1/6 e^2/h is backscattered. A new elemental excitation with e/6 effective charge, the further fractionalization of the e/3 quasi-particles, through topological soliton and topological phase transition is proposed as a tentative explanation.

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Presenters

  • Xi Lin

    Peking University, Peking Univ

Authors

  • Xi Lin

    Peking University, Peking Univ

  • Hailong Fu

    Peking Univ

  • Yijia Wu

    International Center for Quantum Materials, School of Physics, Peking University, Peking Univ

  • Pujia Shan

    Peking Univ

  • Pengjie Wang

    Peking Univ

  • Zheyi Zhu

    Peking Univ

  • Loren Pfeiffer

    Electrical Engineering, princeton university, Department of Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Electrical Engineering, Princeton Univ, EE, Princeton University

  • K West

    Electrical Engineering, princeton university, Department of Electrical Engineering, Princeton University, Princeton University, Univ of Basel, Princeton Univ, Electrical Engineering, Princeton Univ, EE, Princeton University

  • Haiwen Liu

    Department of Physics, Beijing Normal University, Center for Advanced Quantum Studies, Department of Physics, Beijing Normal University, Beijing Normal Univ

  • Xincheng Xie

    International Center for Quantum Materials and School of Physics, Peking University, Peking University, International Center for Quantum Materials, Peking University, International Center for Quantum Materials, School of Physics, Peking University, Peking Univ