Cheng-Guang-Jin G. J. Cheng

Engineering Competing Fractional Topological States in a BHZ Superlattice

Scalar superlattices offer a route from simple topological bands to fractionalized states, while multicomponent systems raise the additional question of which fractional order is energetically selected. We show that a scalar superlattice applied to the Qi-Wu-Zhang (QWZ) Chern-insulator model produces an isolated C = +1...