Band-Insulator-Metal-Mott-Insulator transition in the half--filled $t-t^{\prime }$ ionic-Hubbard chain

G. I. Japaridze, R. Hayn, P. Lombardo +1

We investigate the ground state phase diagram of the half-filled $t-t^{\prime }$ repulsive Hubbard model in the presence of a staggered ionic potential $\Delta$, using the continuum-limi…