Anomalous robustness of the ν=5/2 fractional quantum Hall state near a sharp phase boundary.

@article{Liu2011AnomalousRO,
  title={Anomalous robustness of the $\nu$=5/2 fractional quantum Hall state near a sharp phase boundary.},
  author={Yang Liu and Dobromir Kamburov and Mansour Shayegan and Loren N. Pfeiffer and Ken W. West and Kirk W. Baldwin},
  journal={Physical review letters},
  year={2011},
  volume={107 17},
  pages={
          176805
        }
}
We report magnetotransport measurements in wide GaAs quantum wells with a tunable density to probe the stability of the fractional quantum Hall effect at a filling factor of ν=5/2 in the vicinity of the crossing between Landau levels (LLs) belonging to the different (symmetric and antisymmetric) electric subbands. When the Fermi energy (E(F)) lies in the excited-state LL of the symmetric subband, the 5/2 quantum Hall state is surprisingly stable and gets even stronger near this crossing, and… Expand
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