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Importance of interband transitions for the fractional quantum Hall effect in bilayer graphene

Snizhko, Kirill and Cheianov, Vadim and Simon, Steven H. (2012) Importance of interband transitions for the fractional quantum Hall effect in bilayer graphene. Physical Review B, 85 (20). ISSN 1098-0121

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    Abstract

    Several recent works have proposed that electron-electron interactions in bilayer graphene can be tuned with the help of external parameters, making it possible to stabilize different fractional quantum Hall states. In these prior works, phase diagrams were calculated based on a single Landau level approximation. We go beyond this approximation and investigate the influence of polarization effects and virtual interband transitions on the stability of fractional quantum Hall states in bilayer graphene. We find that for realistic values of the dielectric constant, the phase diagram is strongly modified by these effects. We illustrate this by evaluating the region of stability of the Pfaffian state.

    Item Type: Article
    Journal or Publication Title: Physical Review B
    Additional Information: ©2012 American Physical Society
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    ID Code: 55532
    Deposited By: ep_importer_pure
    Deposited On: 29 Jun 2012 14:13
    Refereed?: Yes
    Published?: Published
    Last Modified: 20 Mar 2014 11:55
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/55532

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