Quantum cluster approach to the topological invariants in correlated Chern insulators

16 Dec 2015Zhao-Long GuKai LiJian-Xin Li

We detect the topological properties of Chern insulators with strong Coulomb interactions by use of cluster perturbation theory and variational cluster approach. The common scheme in previous studies only involves the calculation of the interacting bulk Chern number within the natural unit cell by means of the so-called topological Hamiltonian... (read more)

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