Figure 5. Evolution of Fermi surfaces and dispersions.

(a) Symmetrized Fermi surfaces of SrTiO₃ in k_x– k_y space for (001) surfaces annealed at different temperature. The raw data is shown in Supplementary Fig. 5. (b) Fitted FSs for all the three orbitals. The calculated carrier densities are shown for corresponding FSs. See Methods for calculation formula. The superimposed red and black curves indicate the size change for d_xz FS and d_xy FS, respectively. (c) Fitted dispersions for different orbitals. See Supplementary Fig. 2 for fitting details. The superimposed red and black curves indicate the band bottom change for d_xz band and d_xy band (zero order), respectively.