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We report exact multielectronic ground-states dependent on electronconcentration for quantum mechanical two-dimensional disordered two-band typemany body models in the presence of disordered hoppings and disorderedrepulsive finite Hubbard interactions, in fixed lattice topology consideredprovided by Bravais lattices. The obtained ground-states loose theireigenfunction character for independent electron approximation, perturbativelyare not connected to the non-interacting but disordered case, and describe alocalization-delocalization transition driven by the electron concentration,being highly degenerated and paramagnetic.Comment: Accepted for publication in Phys. Rev.

physical review. b, condensed matter and materials physics

Exact multielectronic electron-concentration-dependent ground states for disordered two-dimensional two-band systems in the presence of disordered hoppings and finite on-site random interactions