Maiti Tanmay, Agarwal Pooja, Purkait Suvankar, Sreejith G J, Das Sourin, Biasiol Giorgio, Sorba Lucia, Karmakar Biswajit
Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India.
Indian Institute of Science Education and Research, Pune 411008, India.
Phys Rev Lett. 2020 Aug 14;125(7):076802. doi: 10.1103/PhysRevLett.125.076802.
Fractional conductance is measured by partitioning a ν=1 edge state using gate-tunable fractional quantum Hall (FQH) liquids of filling 1/3 or 2/3 for current injection and detection. We observe two sets of FQH plateaus 1/9, 2/9, 4/9 and 1/6, 1/3, 2/3 at low and high magnetic field ends of the ν=1 plateau, respectively. The findings are explained by magnetic field dependent equilibration of three FQH edge modes with conductance e^{2}/3h arising from edge reconstruction. The results reveal a remarkable enhancement of the equilibration lengths of the FQH edge modes with increasing magnetic field.
通过使用填充因子为1/3或2/3的门控可调分数量子霍尔（FQH）液体对ν = 1边缘态进行划分来测量分数电导，用于电流注入和检测。我们分别在ν = 1平台的低磁场和高磁场端观察到两组FQH平台，分别为1/9、2/9、4/9和1/6、1/3、2/3。这些发现可以通过由边缘重构产生的电导为e²/3h的三种FQH边缘模式的磁场依赖平衡来解释。结果表明，随着磁场增加，FQH边缘模式的平衡长度显著增强。
