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We study transport properties of the half-filled two-dimensional (2D) Hubbardmodel with spatially varying interactions, where a pattern of interacting andnon-interacting sites is formed. We use Determinantal Quantum Monte Carlomethod to calculate the double occupation, effective hopping and Drude weight.These data point to two phase transitions, driven by fermionic correlations.The first is the expected metal to a Mott insulating state. The second one, isan exotic transition from a Mott insulating state to a highly anisotropicmetal, that takes place at large values of the fermion-fermion interaction.This second transition occurs when the layers formed by the spatially varyinginteractions decouple due to the suppression of the hopping between interactingand non-interacting sites, leading to fermionic transport along thenon-interacting ones.

Correlation driven Mott-insulator-to-metal transition