The surface structure of SrTiO3 at high temperatures under influence of oxygen

被引：9

作者：

Hesselberth, M. B. S. ^{[1
]}

van der Molen, S. J. ^{[1
]}

Aarts, J. ^{[1
]}

机构：

[1] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 05期

关键词：

SCANNING-TUNNELING-MICROSCOPY; INTERFACE; GROWTH;

D O I：

10.1063/1.4864186

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We use low energy electron microscopy to investigate the structure of the SrTiO3 (001) surface at elevated temperatures and different oxygen pressures. Upon varying the temperature between 500 degrees C and 900 degrees C in oxygen pressures ranging from 10(-9) millibar to 10(-4) millibar, two surface transitions are found to be present. The lower temperature (1 x 1) -> (2 x 1) transition that is known to occur in ultrahigh vacuum can be reversed by increasing the oxygen pressure. At higher temperatures, we observe a (2 x 1) -> disordered (1 -> 1) transition which is irreversible in the experimental parameter range. The observations are expected to have a strong bearing on the growth of interface structures. (C) 2014 AIP Publishing LLC.

引用

页数：4

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