Inhomogeneous Metallic Phase in a Disordered Mott Insulator in Two Dimensions
Inhomogeneous Metallic Phase in a Disordered Mott Insulator in Two Dimensions
We show that, with increasing randomness, the spectral gap in a 2D Mott-Hubbard insulator is destroyed first at a disorder V(c1), while antiferromagnetism persists up to a higher V(c2). Most unexpectedly, between V(c1) and V(c2) the system is metallic and is sandwiched between the Mott insulator below V(c1) and the …