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Fractional quantum Hall effect and insulating phase of Dirac electrons in graphene

Author

Listed:
  • Xu Du

    (Rutgers University, Piscataway, New Jersey 08855, USA
    Present address: Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.)

  • Ivan Skachko

    (Rutgers University, Piscataway, New Jersey 08855, USA)

  • Fabian Duerr

    (Rutgers University, Piscataway, New Jersey 08855, USA)

  • Adina Luican

    (Rutgers University, Piscataway, New Jersey 08855, USA)

  • Eva Y. Andrei

    (Rutgers University, Piscataway, New Jersey 08855, USA)

Abstract

Graphene takes partial charge The fractional quantum Hall effect is a quintessential manifestation of the collective behaviour associated with strongly interacting charge carriers confined to two dimensions and subject to a strong magnetic field. It is predicted that the charge carriers present in graphene — an atomic layer of carbon that can be seen as the 'perfect' two-dimensional system — are subject to strong interactions. Nevertheless, the phenomenon had eluded experimental observation until now: in this issue two groups report fractional quantum Hall effect in suspended sheets of graphene, probed in a two-terminal measurement setup. The researchers also observe a magnetic-field-induced insulating state at low carrier density, which competes with the quantum Hall effect and limits its observation to the highest-quality samples only. These results pave the way for the study of the rich collective behaviour of Dirac fermions in graphene.

Suggested Citation

  • Xu Du & Ivan Skachko & Fabian Duerr & Adina Luican & Eva Y. Andrei, 2009. "Fractional quantum Hall effect and insulating phase of Dirac electrons in graphene," Nature, Nature, vol. 462(7270), pages 192-195, November.
    • Handle: RePEc:nat:nature:v:462:y:2009:i:7270:d:10.1038_nature08522
    DOI: 10.1038/nature08522
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    Cited by:

    1. Haoyun Huang & Waseem Hussain & S. A. Myers & L. N. Pfeiffer & K. W. West & K. W. Baldwin & G. A. Csáthy, 2024. "Evidence for Topological Protection Derived from Six-Flux Composite Fermions," Nature Communications, Nature, vol. 15(1), pages 1-6, December.

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