2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18070The quantum-classical crossover from the Fermi liquid towards the Wigner solid is numerically revisited, considering small square lattice models where electrons interact via a Coulomb $U/r$ potential. The studies of models without disorder and spin and including disorder and spin show that the electron solid is formed in two stages, giving rise to an intriguing solid-liquid regime at intermediate couplingsTo appear in the proceedings of the XXXVIth Rencontres de Moriond edited by T. Martin and G. MontambauxMesoscale and Nanoscale PhysicsStrongly Correlated Electronstext