Fig. 3: DFT-calculated two-dimensional Fermi surfaces of La3Ni2O7 thin films for different slab models.
From: Electronic structures and multi-orbital models of La3Ni2O7 thin films at ambient pressure

a and c correspond to the One-UC structure, while b and d corresponds to the Half-UC structure. The upper panels show results obtained with Ueff = 0 eV, and the lower panels correspond to Ueff = 2 eV. Here, Ueff denotes the effective Hubbard parameter, and UC represents the unit cell.