Fig. 3
From: Strongly bound excitons in anatase TiO2 single crystals and nanoparticles

ARPES data of a single crystal of anatase TiO2. a ARPES energy vs. momentum intensity map for a crystal doped with an excess electron density n = 2 × 1019 cm−3 at 20 K. b Second derivative ARPES data of the electronic structure at the top of the VB between Γ and X. Dashed blue lines are added as a guide to the eye. The spectrum is referenced to the bottom of the CB at Γ. The intensity is indicated by a linear colour scale, as displayed in the colour bar