A theory paper argues that Coulomb interactions in a linear-cubic anisotropic flat band system restore a Dirac-like linear dispersion and, for strong coupling, drive it into an excitonic Chern insulator with quantized Hall response.
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Correlated interaction effects in an anisotropic flat band fermion system
A theory paper argues that Coulomb interactions in a linear-cubic anisotropic flat band system restore a Dirac-like linear dispersion and, for strong coupling, drive it into an excitonic Chern insulator with quantized Hall response.