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Fractional and integer quantum Hall effects in the zeroth Landau level in graphene
Experiments on the fractional quantized Hall effect in the zeroth Landau level of graphene have revealed some striking differences between filling factors in the ranges $0<|\ensuremath{\nu}|<1$ and $1<|\ensuremath{\nu}|<2$. We argue that these differences can be largely understood as a consequence of the effects of terms in the Hamiltonian which break …