Ultraviolet photoemission study of single-crystal BaPb1-xBixO3

H. Matsuyama, T. Takahashi, H. Katayama-Yoshida, Y. Okabe, H. Takagi, S. Uchida

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29 Citations (Scopus)


An ultraviolet photoemission study on single-crystal BaPb1-xBixO3 with x=0.15 (superconductor) and x=1.0 (semiconductor) has been presented. A clear Fermi-edge structure was observed for the first time for the superconducting compound. A rigid shift of the valence band by 0.30.4 eV between the superconductor and the semiconductor was observed although the shift is much smaller than predicted from the band-structure calculation. The mysterious 9-eV peak, whose origin has been controversial in cuprate superconductors, was found also for degraded crystal surfaces of BaPb1-xBixO3. Its origin was discussed in connection with the difference and similarity in the high-Tc mechanism between cuprate and noncuprate superconductors.

Original languageEnglish
Pages (from-to)2658-2661
Number of pages4
JournalPhysical Review B
Issue number4
Publication statusPublished - 1989


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