Even-denominator fractional quantum Hall states at 5/2 and 7/2 are observed in the zeroth Landau level of ABA trilayer graphene, appearing only near crossings of valley-split levels tuned by an electric field.
E ffective low energy Hamiltonian can be constructed by expanding the above Hamiltonian near K +/K- points
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Even-denominator fractional quantum Hall states in the zeroth Landau level of ABA trilayer graphene
Even-denominator fractional quantum Hall states at 5/2 and 7/2 are observed in the zeroth Landau level of ABA trilayer graphene, appearing only near crossings of valley-split levels tuned by an electric field.