Defect States at the TiO2110 Surface Probed by Resonant Photoelectron Diffraction.

Peter Krüger (1) , S. Bourgeois (1) , B. Domenichini (1) , Hélène Magnan (2) , D. Chandesris (3) , P. Le Fevre (3) , A. M. Flank (3) , J. Jupille (4) , L. Floreano (5) , A. Cossaro (5) , A. Verdini (5) , A. Morgante (5, 6)

1 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne
2 SPCSI - Service de Physique et de Chimie des Surfaces et Interfaces
3 SSOLEIL - Synchrotron SOLEIL
4 INSP - Institut des Nanosciences de Paris
5 Laboratorio Nazionale TASC-INFM
6 Dipartimento di Fisica

The charge distribution of the defect states at the reduced TiO2110 surface is studied via a new method, the resonant photoelectron diffraction. The diffraction pattern from the defect state, excited at the Ti-2p-3d resonance, is analyzed in the forward scattering approach and on the basis of multiple scattering calculations. The defect charge is found to be shared by several surface and subsurface Ti sites with the dominant contribution on a specific subsurface site in agreement with density functional theory calculations.

Peter Krüger, S. Bourgeois, B. Domenichini, Hélène Magnan, D. Chandesris, et al.. Defect States at the TiO2110 Surface Probed by Resonant Photoelectron Diffraction.. Physical Review Letters, 2008, 100, pp.055501/1-055501/4. ⟨10.1103/PhysRevLett.100.055501⟩. ⟨hal-00476093⟩