Topological behaviors in Kondo insulators

Abstract

Since Kondo insulators are simultaneously subject to time-reversal symmetry and spatial antisymmetry, topological interactions exhibit topological Kondo insulating properties. To investigate the topological behaviors, we proposed a topologically interacting Kondo model with the slave-boson mean-field approximation in a square lattice ribbon. Different phases arise in different topological interactions and itinerant electron densities. In particular, the Kondo effect disappears at the edges in the Kondo and topological Kondo insulating phases. In the topological Kondo states, the conducting edge band is non-linear.