2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16880The 2D metal-insulator transition can be induced either by decreasing the carrier density or by increasing the spin polarization by applying a magnetic field parallel to the plane. Using experimental results for the shift in critical carrier density in an applied field, we show that the two-electron pair correlation function at short distance ($k_Fr\alt2$) has a universal form along the transition line in the magnetic field-carrier density plane. This result provides direct evidence of the central role of Coulomb repulsion and the exchange-correlation hole in driving the metal-insulator transition.8 pages, 4 figuresStrongly Correlated Electronstext