A study on surface symmetry and interfacial enhancement of SrTiO3 by second harmonic generation
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- 作者：RuiQiang Zhao (1)
KuiJuan Jin (1)
HaiZhong Guo (1)
HuiBin Lu (1)
GuoZhen Yang (1) - 关键词：Perovskite oxides ; surface ; crystal symmetry ; second harmonic generation
- 刊名：SCIENCE CHINA Physics, Mechanics & Astronomy
- 出版年：2013
- 出版时间：December 2013
- 年：2013
- 卷：56
- 期：12
- 页码：2370-2376
- 全文大小：656 KB
- 作者单位：RuiQiang Zhao (1)
KuiJuan Jin (1)
HaiZhong Guo (1)
HuiBin Lu (1)
GuoZhen Yang (1)
1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China - ISSN：1869-1927
文摘
The symmetry of the surfaces of SrTiO3 and slightly Nb-doped SrTiO3 crystals was investigated by the optical reflected second harmonic generation technique. The good agreement between experimental and theoretical results of the second harmonic intensity dependence on the azimuth angle indicates that the SrTiO3 (001) surface is with 4mm symmetry and the Nb-doped SrTiO3 (111) surface with 3m symmetry. The measurements of the polarization dependent second harmonic intensity confirm that conclusion. The enhancement of the surface polarization in the structure of SrTiO3 capped La0.9Sr0.1MnO3 films compared with that in the La0.9Sr0.1MnO3 films has been obtained.