β-(AlxGa1-x)2O3单晶晶体的空间相关性和异质性
Liuyan Li1,2, Lingyu Wan1,2, Changtai Xia3
1Center on Nanoenergy Research, Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration, Carbon Peak and Neutrality Science and Technology Development Institute, School of Physical Science & Technology, Guangxi University, Nanning 530004, China.
Materials (Basel, Switzerland)
|June 28, 2023
概括
将氧化 (AlxGa1-x)2O3晶体与合金,可以降低晶体秩序并增强异构性. 温度还降低了晶体的秩序,更显著地影响了低频声子.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 晶体学 晶体学是指结晶学.
背景情况:
- 了解长距离的结晶学顺序和异构性对于优化β-AlxGa1-x) 2O3晶体的特性至关重要.
- 将纳入氧化物 (Ga2O3) 中可以显著改变其结构和光学特性.
研究的目的:
- 系统地研究组成对β-AlxGa1-x) 2O3晶体的长距离顺序和异质性的影响.
- 分析温度如何影响这些合金晶体的相关长度和异构性.
主要方法:
- 光学浮动区方法用于制备具有不同Al含量的晶体 (x = 0.0到0.26).
- 角度分辨率极化拉曼光谱检测晶体学秩序和异构性.
- 空间相关模型用于量化拉曼模式的相关长度 (CL).
主要成果:
- 合金导致拉曼峰变蓝和扩大,表明随着Al含量增加,结晶学秩序减少.
- 相对应长度 (CL) 随着Al组成的增加而减少,对低频声子的影响更为明显.
- 温度增加也减少了所有拉曼模式的CL. 拉曼峰强度显示出强烈的极化依赖性,揭示了合金的增强异性质,特别是在低频模式,而高频模式显示出异性质的降低.
结论:
- 的合并显著影响β-(AlxGa1-x)2O3晶体的远程顺序和异质性.
- 这些发现为这些技术重要材料的结构-性质关系提供了关键的见解,指导了未来的材料设计和应用.
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