| Phonon Characteristics of Polycrystalline Cubic SrTiO3 Thin Films |
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| 作者姓名： | 杜宇雷 陈光 张明生 杨森祖 |
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| 作者单位： | [1]DepartmentofMaterialsScienceandEngineering,NanjingUniversityofScienceandTechnology,Nanjing210094 [2]NationalLaboratoryofSolidStateMicrostructures,NanjingUniversity,Nanjing210093 [3]DepartmentofElectricalScienceandEngineering,NanjingUniversity,Nanjing210093 |
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| 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 300 K 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 95K to 300K. In contrast, the nonpolar TO3 phonon and polar TO4 phonons were mostly symmetric.
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| 关 键 词： | SrTiO3薄膜 钛酸锶薄膜 多晶立方体 声子特征 钙钛矿结构 铁电体 |
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