Electronic structure of protonic conductor SrCeO3 by soft-X-ray spectroscopy

被引：6

作者：

Higuchi, T

Tsukamoto, T

Sata, N

Hattori, T

Yamaguchi, S

Shin, S

机构：

[1] Tokyo Univ Sci, Dept Appl Phys, Shinjuku Ku, Tokyo 1628601, Japan

[2] Tohoku Univ, Dept Machine Intelligence & Syst Engn, Sch Engn, Sendai, Miyagi 9808579, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] Univ Tokyo, Dept Mat & Sci, Tokyo 1138656, Japan

[5] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[6] RIKEN, Wako, Saitama 6795143, Japan

来源：

SOLID STATE IONICS | 2004年 / 175卷 / 1-4期

关键词：

protonic conductor; SrCe1-xYxO3; electronic structure; resonant-photoemission spectroscopy (RPES); X-ray absorption spectroscopy (XAS); hole state;

D O I：

10.1016/j.ssi.2004.03.041

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electronic structure of protonic conductor SrCe1-xYxO3-delta (x=0, 0.05) has been studied by resonant-photoemission spectroscopy (RPES) and X-ray absorption spectroscopy (XAS) in the soft-X-ray region. The RPES spectra exhibit that the O 2p state strongly hybridizes with Ce 4f state in the valence band. The valence band consists of the mixed-valent states of the 4f(0) (Ce4+) and 4f(1)(L) under bar (Ce3+) Configurations. The XAS spectra in the band gap energy region show a hole state at the top of the valence band and an acceptor-induced level just above the Fermi level (E-F). The energy position of the hole state accords with that of the Cc 31 state. The energy separation between the hole state and EF is ill good agreement with the activation energy. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：549 / 552

页数：4

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