An STM, XPS and LEED investigation of the BaTiO3(111) surface

被引：22
|
作者：
Hagendorf, C [1 ]
Schindler, KM [1 ]
Doege, T [1 ]
Neddermeyer, H [1 ]
机构：
[1] Univ Halle Wittenberg, D-06099 Halle, Germany
来源：
SURFACE SCIENCE | 1998年 / 402卷 / 1-3期
关键词：
barium titanate; low energy electron diffraction (LEED); scanning tunneling microscopy (STM); surface structure; X-ray photoelectron spectroscopy (XPS);
D O I：
10.1016/S0039-6028(97)01064-9
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 BaTiO3(111) surface is investigated with STM, XPS and LEED. Vacuum-annealing at 1470 K gives terraces with a (root 3 x root 3)R30 degrees superstructure. The reduction of the surface is probed with XPS through the appearance of shoulders in the Ti 2p photoemission lines due to the formation of Ti3+ centers. Annealing in oxygen at 1470 K produces terraces with (1 x 1) and (2 x 2) superstructures. which are reverted not into a (root 3 x root 3)R30 degrees superstructures by vacuum-annealing but into a mixture of terraces of (2 x 2) and (root 3 x root 3)R30 degrees superstructures. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：581 / 585
页数：5
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