Surface electronic structure of electron-doped SrTiO3

被引：29

作者：

Haruyama, Y

Aiura, Y

Bando, H

Suzuki, H

Nishihara, Y

机构：

[1] UNIV TSUKUBA,INST PHYS,TSUKUBA,IBARAKI 305,JAPAN

[2] SANYO ELECT CO LTD,TSUKUBA RES CTR,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA B | 1997年 / 237卷

关键词：

electronic structure; photoemission spectroscopy; SrTiO3;

D O I：

10.1016/S0921-4526(97)00238-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The surface electronic structure of electron-doped SrTiO3 has been studied using the ultraviolet photoemission spectroscopy (UPS). By Nb substitution for Ti, two kinds of doping peaks are induced in the bulk band gap region of SrTiO3; a metallic peak with a sharp Fermi cut-off and a broad peak centered at similar to 1.3 eV below the Fermi level (E-F). The feature of these doping peaks is essentially identical to that recently reported in the case of the La substitution for Sr. The UPS spectra near E-F are shown to be very sensitive to the oxygen exposure. The behavior under the oxygen exposure can be explained by the formation of surface dipole layer by negative adsorbed species.

引用

页码：380 / 382

页数：3

共 5 条

[1] Effect of doping electrons on the electronic structure of LaxSr1-xTiO3 studied by ultraviolet photoemission spectroscopy [J].