Communications in Physics | 2019
Erratum: Mott Transition in the Mass Imbalanced Ionic Hubbard Model at Half Filling
Abstract
The Mott Hubbard metal insulator transition in the half-filled mass imbalanced ionic Hubbard model is investigated using the two-site dynamical mean field theory. We find that for a fixed mass imbalanced parameter r the critical interaction Uc increases when the ionic energy ∆ is increased. In the other hand, for a fixed ∆, Uc decreases with increasing the mass imbalance. We also show the existence of a band insulating phase in the system for the case ∆ 6= 0,U = 0 and calculate the staggered charge density nB−nA as a function of the interaction for different values of the mass imbalance. Our results in the limiting cases (r = 1, ∆ 6= 0 or/and ∆ = 0, r 6= 1) are in good agreement with those obtained from the full dynamical mean field theory.