Magnetic field effect on doped Kondo insulators Original Research Article

In this work we study the effect of an applied magnetic field on the metal–insulator transition in Kondo insulators doped with non-rare earth element. In the theoretical formulation of the problem we use a two band model, in which a narrow correlated band is hybridized with a wide band of conduction electrons. The obtained phase diagrams show that, depending on the type of impurities introduced into the Kondo insulators, the external magnetic field and the impurities can either cooperate or compete to the stabilization of the metallic phase.