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    題名: The electronic structure of Ba1−xCaxTiO3 probed by X-ray absorption spectroscopy
    作者: Asokan, K.;Jan, J. C.;Chiou, J. W.;彭維鋒;Pong, W. F.;Tsai, M. H.;Chang, Y. K.;Chen, Y. Y.;Hsieh, H. H.;Lin, H. J.;Yang, Y. W.;Lai, L. J.;林諭男;Lin, I. N.
    貢獻者: 淡江大學物理學系
    關鍵詞: XANES;Perovskites;Ferroelectric
    日期: 2004-07-01
    上傳時間: 2009-12-31 10:31:03 (UTC+8)
    出版者: Elsevier
    摘要: We report O K-, Ca K- and L3,2-, and Ti L3,2-edge X-ray absorption near edge structure (XANES) spectra of Ba1−xCaxTiO3 (x=0, 0.01, 0.08, and 1) and the electronic properties inferred from these XANES spectra. The spectra of O K-, Ca L3,2- and Ti L3,2-edges show characteristic spectral features attributable to the t2g and eg bands. The Ti and Ca L3,2-edge spectra contain two sets of L3 and L2 features with a L3–L2 separation of about 5.5 and 3.4 eV, respectively. We also observe a pre-edge feature in the Ca K-edge spectra and drastically reduced t2g features in the Ca L3,2-edge spectra. Our XANES spectra reveal that the Ca 3d bands are low-lying and the Ca 3d t2g bands are partially occupied.
    關聯: Journal of Solid State Chemistry 177(8), pp.2639-2643
    DOI: 10.1016/j.jssc.2004.04.043
    顯示於類別:[物理學系暨研究所] 期刊論文


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