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Exact result on the Mott transition in a two-dimensional model of strongly correlated electrons

Frederic Mila
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Abstract

We study the properties of a quarter-filled system of electrons on a square lattice interacting through a local repulsion $U$ and a nearest-neighbour repulsion $V$ in the limit $V=+\infty$. We identify the ground-state for $U$ large enough and show that domain walls appear below a critical value $U_c=4t/π$. We argue that this corresponds to a metal-insulator transition due to Mott localization.

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Frederic Mila. 1994-04-07. Exact result on the Mott transition in a two-dimensional model of strongly correlated electrons. https://doi.org/10.1103/physrevb.49.14047

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