X-ray Absorption and Inverse Photoemission Study of Y_<1-x>Ca_xTiO_3(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

概要

論文の詳細を見る
We have performed the O 1s x-ray absorption (XAS) and resonant inverse photoemission spectroscopy (RIPES) in Mott insulator YTiO_3, band insulator CaTiO_3 and Y_<0.61>Ca_<0.39>TiO_3 with a metal-insulator transition. In CaTiO_3, the spectrum has strong π* and σ* peaks derived from the Ti 3d-O 2p hybridization bands near the Fermi level. On the other hand the peaks almost disappear in the XAS spectrum of YTiO_3. In Y_<0.61>Ca_<0.39>TiO_3, the intensities of the π* and σ* structures increase with decreasing temperature, showing that degree of the p-d hybridization increases from the insulator to metal phases.
社団法人日本物理学会の論文
2007-07-15