Photoemission study on protonic conductor p-type SrTiO3

被引：10

作者：

Higuchi, T

Tsukamoto, T

Sata, N

Ishigame, M

Tezuka, Y

Shin, S

机构：

[1] Sci Univ Tokyo, Fac Sci, Tokyo 162, Japan

[2] Tohoku Univ, Res Inst Sci Measurements, Aoba Ku, Sendai, Miyagi 98077, Japan

[3] Univ Tokyo, Inst Solid State Phys, Tanashi, Tokyo 188, Japan

来源：

SOLID STATE IONICS | 1998年 / 108卷 / 1-4期

关键词：

protonic conduction; p-type SrTiO3; photoemission; rigid-band model; hybridization; satellite;

D O I：

10.1016/S0167-2738(98)00062-9

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 Sc-doped p-type SrTiO3 has been studied by photoemission spectroscopy. Comparing the results with those of Nb-doped n-type SrTiO3, the Fermi level of p-type is shifted to the low binding energy. As Sc dopant increases, the top of the valence band is shifted to the low binding energy in accord with the rigid-band model. The Ti 3d component in the O 2p band of p-type SrTiO3 increases compared with that of the n-type one. It was also found that the satellite intensities of Ti core levels drastically increase. The covalency of p-type SrTiO3 increases by the doping of the Sc ions. The dopant concentration dependence shows that the covalency is strongest when the Sc concentration is 2 mol%. These facts suggest that the covalency is related to the protonic conduction. reserved. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：349 / 353

页数：5

共 9 条

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HIRAMOTO K, UNPUB

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