Doping-driven Mott transition from steady-state density functional theory
arXiv:2608.21029
Abstract
The doping-driven Mott transition in the Hubbard model is described within the frame- work of steady-state density functional theory, or i-DFT. In order to access the many-body spectral function in i-DFT, an approximation for the exchange-correlation (xc) bias at arbitrary density and current is required. By using Fermi-liquid theory, a connection between the xc bias of i-DFT and the quasiparticle weight of many-body theory is derived and the results are employed to guide the construction of the approximation. Numerical results obtained with this functional demonstrate that the doping-driven Mott transition can indeed be captured with i-DFT.
22 pages, 5 figures