Fractional quantum hall effect and Wigner crystal of interacting composite fermions

Yang Liu, D. Kamburov, S. Hasdemir, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin

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Abstract

In two-dimensional electron systems confined to GaAs quantum wells, as a function of either tilting the sample in a magnetic field or increasing density, we observe multiple spin-polarization transitions of the fractional quantum Hall states at filling factors ν=4/5 and 5/7. The number of observed transitions provides evidence that these are fractional quantum Hall states of interacting two-flux composite fermions. Moreover, the fact that the reentrant integer quantum Hall effect near ν=4/5 always develops following the transition to full spin polarization of the ν=4/5 fractional quantum Hall state links the reentrant phase to a pinned ferromagnetic Wigner crystal of composite fermions.

Original languageEnglish (US)
Article number246803
JournalPhysical review letters
Volume113
Issue number24
DOIs
StatePublished - Dec 11 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Liu, Y., Kamburov, D., Hasdemir, S., Shayegan, M., Pfeiffer, L. N., West, K. W., & Baldwin, K. W. (2014). Fractional quantum hall effect and Wigner crystal of interacting composite fermions. Physical review letters, 113(24), [246803]. https://doi.org/10.1103/PhysRevLett.113.246803