STRUCTURES AND CHEMISTRY OF THE ANNEALED SRTIO3(001) SURFACE

被引：82

作者：

LIANG, Y ^{[1
]}

BONNELL, DA ^{[1
]}

机构：

[1] UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104

来源：

SURFACE SCIENCE | 1994年 / 310卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(94)91378-1

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：

Surface structures and chemistry of the annealed SrTiO3(001) have been studied by scanning tunneling microscopy and Auger electron spectroscopy. Our STM results show that islands are formed on an originally smooth surface after annealing in ultra high vacuum at a temperature of 1300-degrees-C. Tunneling spectra show that the islands exhibit a different electronic structure than that of SrTiO3, with an apparent bandgap of 6 eV rather than 3.2 eV. Auger electron spectroscopy indicates that annealing yields strontium enrichment at the surface. The nature of the islands and change of surface chemistry are discussed in terms of correlation of the STM and Auger results.

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页码：128 / 134

页数：7

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