Evidence for the constancy of U in the Mott transition of V2O3

The Mott-Hubbard metal-insulator transition (MH-MIT) is a fundamental phenomenon not only for stronglycorrelated physics [1] but also for solid state physics gen-erally. Dynamic mean field theory (DMFT) [2] has pro-vided a new conceptual framework for describing how theMH-MIT occurs in the one-band Hubbard model whenthe on-site Coulomb repulsion U exceeds a critical valueU