Observation of a bubble phase of composite fermions

ORAL

Abstract

Non-interacting composite fermions can be used to account for the majority of fractional quantum Hall states. However, the residual interactions between composite fermions can lead to the formations of more exotic states with complex correlations. We recently observed a bubble phase of composite fermions in a GaAs two-dimensional electron gas sample near Landau level filling factor ν = 5/3. This phase with very interesting correlations was identified via a reentrant behavior of the fractional quantum Hall effect in transport measurements. Our finding reveals a new class of strongly correlated topological phases, driven by the clustering and charge ordering of emergent quasiparticles.

* We acknowledge useful discussions with J. Jain and V. Scarola. Measurements at Purdue were supported by the NSF DMR Grant No. 1904497. The sample growth effort at Princeton University was supported by the Gordon and Betty Moore Foundation Grant No. GBMF 4420 and the National Science Foundation MRSEC Grant No. DMR-1420541.

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Publication: Shingla, V., Huang, H., Kumar, A. et al. A highly correlated topological bubble phase of composite fermions. Nat. Phys. 19, 689–693 (2023). https://doi.org/10.1038/s41567-023-01939-2

Presenters

  • Haoyun Huang

    Purdue University

Authors

  • Haoyun Huang

    Purdue University

  • Vidhi Shingla

    Purdue University

  • Ashwani Kumar

    Monmouth College

  • Loren N Pfeiffer

    Princeton University

  • Kenneth W West

    Princeton University

  • Kirk Baldwin

    Princeton University

  • Gabor A Csathy

    Purdue University