Phase diagram topology of the Haldane-Hubbard-Coulomb model

Igor S. Tupitsyn, Nikolay V. Prokof'ev

We study the phase diagram of the interacting spin-$1/2$ Haldane model with chiral phase $\varphi =\pi /2$ at half-filling. Both on-site and long-range Coulomb repulsive interactions (Halda…