Fig. 3: Low-energy effective model.
From: An electronic origin of charge order in infinite-layer nickelates
a Schematics of the three competing states studied in the effective model: the uniform PM state (top), the checkerboard AFM state (middle) and the \({{{{{{{\bf{q}}}}}}}}=\left(\frac{1}{3},\, 0,\, 0\right)\) CO state (bottom). b The total energy E calculated using the low-energy effective model Eq. (1) (up to a constant) in the PM (red), the AFM (blue) and the CO (green) states as a function of Ud. The purple dashed line highlights Ud = 3.7 eV, which reproduces the Ni-\({d}_{{x}^{2}-{y}^{2}}\) orbital effective mass from the ab initio GW+EDMFT calculation55. The error bar is smaller than the symbol size (see Methods). c–h Orbital-resolved spectral functions calculated by using the low-energy effective model with Ud = 3.7 eV. c In the PM state. e In the AFM state. g In the CO state. d, f and h are the enlarged plots showing the corresponding near-Fermi-level features of the spectral function. Source data are provided as a Source Data file.
