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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27629

    Title: Direct experimental evidence of hybridization of Pb states with O 2p states in ferroelectric perovskite oxides
    Authors: Jan, J. C.;Tsai, H. M.;Pao, C. W.;Chiou, J. W.;Asokan, K.;Kumar, K. P. K.;Pong, W. F.;Tang, Y. H.;Tsai, M. H.;Kuo, S. Y.;Hsieh, W. F.
    Contributors: 淡江大學物理學系
    Date: 2005-07-04
    Issue Date: 2009-12-31 10:31:06 (UTC+8)
    Publisher: College Park: American Institute of Physics (AIP)
    Abstract: This work presents the O K- and Ti L3,2-edge x-ray absorption near-edge structure (XANES) spectra of PbxSr1-xTiO3 (PxSTO) and BaxSr1-xTiO3 (BxSTO) compounds with various Pb and Ba concentrations. The result provides direct evidence that the Pb–O bonding strongly affects O 2p–Ti 3d hybridization in the TiO6 octahedron of PxSTO. In contrast, the Ba–O bonding does not substantially affect O 2p–Ti 3d hybridization in BxSTO. The Ti L3-edge XANES spectra show the splitting of the eg band for PxSTO with x≳0.5, which provides an evidence of Pb-induced tetragonal distortion in the TiO6 octahedron. In contrast, eg band splitting is absent in BxSTO.
    Relation: Applied Physics Letters 87(1), pp.012103(3 pages)
    DOI: 10.1063/1.1988984
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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