Electronic structure of La1−xSrxScO3 probed by soft-x-ray absorption spectroscopy

Abstract

The electronic structure of La1−xSrxScO3 single crystal has been studied by x-ray absorption spectroscopy (XAS). The conduction band is mainly composed of Sc 3d state hybridized with O 2p state. The O 1s XAS spectrum exhibits the existence of the Sc 3d-defect-induced state under the Sc 3d conduction band. The intensity of Sc 3d-defect-induced state increases with Sr substitution. The energy separation between the top of the valence band and the bottom of the Sc 3d-induced unoccupied state is in accordance with the energy gap that is expected from optical absorption.