Fragile Fractional Quantum Hall States in the Lowest and the Second Landau Level

ORAL

Abstract

Ultra-low temperature measurements of the two-dimensional electron gas have revealed some of the most fragile fractional quantum Hall states. In these experiments electron thermalization was achieved using a He-3 immersion cell and the temperature of the bath is monitored using a quartz tuning fork viscometer. We will review the recently discovered fractional quantum Hall state at filling factor $\nu=3+1/3$ observed in the second Landau level and those at the filling factor $\nu=4/11$ and $5/13$ in the lowest Landau level. The work at Purdue was supported by NSF DMR 1207375 and 1505866 grants. The work at Princeton University was funded by the Gordon and Betty Moore Foundation through the EPiQS initiative Grant GBMF4420, and by the National Science Foundation MRSEC Grant DMR-1420541.

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Authors

  • Gabor Csathy

    Purdue University Dept. of Physics, Purdue University

  • Ethan Kleinbaum

    Purdue University

  • Ashwani Kumar

    Monmouth College

  • Nodar Samkharadze

    Purdue University

  • Loren Pfeiffer

    Princeton University, Dept. of Electrical Engineering, Princeton University, Princeton, NJ, Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, Department of Electrical Engineering, Princeton University, Princeton

  • Ken West

    Princeton University, Dept. of Electrical Engineering, Princeton University, Princeton, NJ, Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, Princeton