Realizing Universal Edge Properties in Graphene Fractional Quantum Hall Liquids

Details Realizing Universal Edge Properties in Graphene Fractional Quantum Hall Liquids Realizing Universal Edge Properties in Graphene Fractional Quantum Hall Liquids

2011-09-27

arxiv.org/abs/1109.5994v1

Phys. Rev. Lett. 107, 236806 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.107.236806

Universal chiral Luttinger liquid behavior has been predicted for fractional quantum Hall edge states, but so far has not been observed experimentally in semiconductor-based two-dimensional electron gases. One likely cause of this absence of universality is the generic occurrence of edge reconstruction in such systems, which is the result of a competition between confinement potential and Coulomb repulsion. We show that due to a completely different mechanism of confinement, edge reconstruction can be avoided in graphene, which allows for the observation of the predicted universality.

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