High-resolution EELS study of the vacancy-doped metal/insulator system, Nd1−xTiO3, x=0 to 0.33.

High-resolution electron energy loss spectroscopy (EELS) spectra have been obtained for several members of the vacancy-doped metal/insulator perovskite system Nd1−xTiO3 where NdTiO3 (x=0) is a Mott–Hubbard insulator and Nd2/3TiO3 (x=0.33), a band insulator. The insulator to correlated-metal transitions occur at x≈0.20 and x≈0.10. Both O K- and Ti L2,3-edge data were obtained on the title materials and the related d0 perovskites, CaTiO3, SrTiO3 …