Magnetic and lattice ordered fractional quantum Hall phases in graphene
Magnetic and lattice ordered fractional quantum Hall phases in graphene
At and near charge neutrality, monolayer graphene in a perpendicular magnetic field is a quantum Hall ferromagnet. In addition to the highly symmetric Coulomb interaction, residual lattice-scale interactions, Zeeman, and sublattice couplings determine the fate of the ground state. Going beyond the simplest model with ultra-short-range residual couplings to more …