Quantum anomalous Hall effect in a flat band ferromagnet
Quantum anomalous Hall effect in a flat band ferromagnet
We proposed a theory of quantum anomalous Hall effect in a flat band ferromagnet on a two-dimensional decorated lattice with spin-orbit coupling. Free electrons on the lattice have dispersionless flat bands, and the ground state is highly degenerate when each lattice site is occupied averagely by one electron, i.e., the …