Optical control of local ferroelectric polarity

局部铁电极性的光学控制

• 批准号: 23656219
• 负责人: TONOUCHI Masayoshi
• 金额: $ 2.66万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656219/
• 关键词: テラヘルツ放射; 強誘電分極; ナノドメイン; テラヘルツ波; 強誘電体; 非線形分光

We studied the temperature dependence of the dielectric dispersion of SrTiO3 thin films on MgAl2O4 by broadband THz-TDS and we found evidence of a ferroelectric phase transition at around 170 K. Furthermore, the increase ofε" in the gigahertz frequency region and the increase ofγTO1 below T_c imply the existence of polar nanoregions that have been observed in other ferroelectric materials with a perovskite structure and relaxor ferroelectrics.

我们用宽带太赫兹- tds研究了SrTiO3薄膜在MgAl2O4上介电色散的温度依赖性，发现在170 K左右出现铁电相变的证据。此外，ε”在ghz频率区域的增加和γ to1在T_c以下的增加表明极性纳米区域的存在，这在其他具有钙钛矿结构和弛豫铁电体的铁电材料中已经观察到。

项目成果

Strain-Induced Ferroelectricity of a SrTiO_3 Thin Film on a MgAl_2O_4 Su bstrate Observed by Terahertz Time-Domain Spectroscopy

太赫兹时域光谱观测 MgAl_2O_4 基底上 SrTiO_3 薄膜的应变感应铁电性

• DOI: 10.1007/s10762-011-9839-9
• 发表时间: 2012
• 期刊: JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
• 影响因子: 2.9
• 作者: M. Yamamoto;K. Kimura;Y. Harada;and T. Kita;堀陽平・柳井武志・中野正基・福永博俊;松浦祐司;金城隆平
• 通讯作者: 金城隆平

Observation of In-Plane Strained SrTiO3 Thin Films by Terahertz Time-domain Spectroscopy

太赫兹时域光谱观察面内应变 SrTiO3 薄膜

• 发表时间: 2011
• 作者: R. Kinjo;I. Kawayama;H. Murakami;M. Tonouchi
• 通讯作者: M. Tonouchi

Ferroelectric Soft Mode in a SrTiO3 Thin Film Impulsively Driven to the Anharmonic Regime Using Intense Picosecond Terahertz Pulses

• DOI: 10.1103/physrevlett.108.097401
• 发表时间: 2012-02-28
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Katayama, I.;Aoki, H.;Tanaka, K.
• 通讯作者: Tanaka, K.

Strain induced conductivity change of SrRuO_3 thin films observed by terahertz time-domain spectroscopy

太赫兹时域光谱观测SrRuO_3薄膜应变引起的电导率变化

• 发表时间: 2011
• 作者: M. Yamamoto;K. Kimura;Y. Harada;and T. Kita;池田時浩;藤原康文;横井佑司・柳井武志・中野正基・福永博俊;金城隆平
• 通讯作者: 金城隆平

Cutting-edge terahertz technology and prospect of its application

前沿太赫兹技术及其应用前景

• 发表时间: 2012
• 作者: Yuji YOKOI;Hirotoshi FUKUNAGA;Masaki NAKANO;Takeshi YANAI;Tokihiro Ikeda;M. Tonouchi
• 通讯作者: M. Tonouchi