The Triggering Role of Carrier Mobility in the Fractional Quantum Hall Effect Formation—An Evidence in Graphene

DOI: 10.4236/jmp.2013.412196   PDF   HTML   XML   3,059 Downloads   4,355 Views  


Recent experiments with suspended graphene have indicated the crucial role of carrier mobility in the competition between Laughlin collective state and insulating state, probably of Wigner-crystal-type. Moreover, the fractional quantum Hall effect (FQHE) in graphene has been observed at a low carrier density where the interaction is reduced as a result of particles dilution. This suggests that the interaction may not be a sole factor in the triggering of FQHE as it was expected basing on the standard formulation of the composite fermion model. Here, the topological arguments are presented to explain the observed features of the FQHE in graphene and the triggering role of carrier mobility in formation of the Laughlin state.

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J. Jacak and L. Jacak, "The Triggering Role of Carrier Mobility in the Fractional Quantum Hall Effect Formation—An Evidence in Graphene," Journal of Modern Physics, Vol. 4 No. 12, 2013, pp. 1591-1596. doi: 10.4236/jmp.2013.412196.

Conflicts of Interest

The authors declare no conflicts of interest.


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