Fig. 4
From: Nature of the metal-insulator transition in few-unit-cell-thick LaNiO3 films
Orbital polarization in the LaNiO3 films. a XAS spectra at Ni L2-edge for E⊥c (blue) and E∥c (red) polarizations and X-ray linear dichroism for a 50 u.c. and a 1.5 u.c LaNiO3 films. Solid lines show the Gaussian fit. b Schematic of the 3d orbitals for the 50 u.c. and 1.5 u.c LaNiO3 films. EF denotes the Fermi energy. c Magnitude of the negative d-orbital polarization vs. film thickness
