SrTiO3(100) - √5 x √5-R26.6 surface observed by high-resolution scanning tunneling microscopy

被引：11
|
作者：
Shiraki, Ichiro [1 ]
Miki, Kazushi [2 ,3 ]
机构：
[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Yamanashi 4008511, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
来源：
SURFACE SCIENCE | 2011年 / 605卷 / 13-14期
基金：
日本学术振兴会;
关键词：
Scanning tunneling microscopy (STM); Strontium titanate (SrTiO3); Surface reconstruction; Ultrahigh vacuum (UHV); OXYGEN VACANCIES; SRTIO3(001); STM;
D O I：
10.1016/j.susc.2011.04.023
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：
SrTiO3(100)-(root 5 x root 5)-R26.6 surfaces were studied by means of high-resolution scanning tunneling microscopy (STM) under ultrahigh vacuum conditions. By varying the bias voltage in the occupied state, it was possible to observe the arrangement of titanium and oxygen atoms in the unit cells of a (root 5 x root 5) surface superstructure, which revealed that the TiO2 layer is the terminating plane of the (root 5 x root 5) surface. In the STM images, peculiar protrusions were seen at the oxygen fourfold hollow site responsible for root 5 x root 5 periodicity. The protrusions are asymmetrical in contrast, which would be an important consideration in proposing accurate structural models for (root 5 x root 5) surface superstructures. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1304 / 1307
页数：4
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