Phonon characteristics of polycrystalline cubic SrTiO3 thin films

被引：10

作者：

Du, YL ^{[1
]}

Chen, G

Zhang, MS

Yang, SZ

机构：

[1] Nanjing Univ Sci & Technol, Dept Mat Sci & Engn, Nanjing 210094, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[3] Nanjing Univ, Dept Elect Sci & Engn, Nanjing 210093, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2003年 / 20卷 / 09期

关键词：

D O I：

10.1088/0256-307X/20/9/344

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Polycrystalline SrTiO3 thin films with the cubic perovskite structure were grown on quartz substrates by pulsed laser deposition. The first-order Raman scattering processes, which were forbidden in SrTiO3 single crystals, were observed in the films at 300K and lower temperatures due to the structural distortion causing by strain effect and oxygen vacancies. The polar TO2 phonon showed a typical Fano asymmetry in the entire temperature region from 95 K to 300 K. In contrast, the nonpolar TO3 Phonon and polar TO4 phonons were mostly symmetric.

引用

页码：1561 / 1564

页数：4

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