室温极地的观测
1Department of Materials Science and Engineering, University of California, Berkeley, CA, USA. sujitdas@berkeley.edu.
Nature
|April 19, 2019
概括
研究人员在铁电超级网中发现室温极气泡. 这些纳米结构表现出奇拉性,并可用于负电容和新兴奇拉性应用的先进材料.
科学领域:
- 凝聚物质物理学
- 材料科学
- 纳米技术
背景情况:
- 复杂的拓结构驱动了凝聚物质物理学中的新兴现象.
- 在 (PbTiO3) n/(SrTiO3) n超级格子中的极化,表现出奇拉性和负电容.
- 了解外来阶段需要探索新的拓结构.
研究的目的:
- 在铁电异构结构中发现和描述新的拓结构.
- 调查这些结构对先进电子功能的潜力.
- 在酸/酸超中探索室温出现的现象.
主要方法:
- 用于成像的原子分辨率扫描传输电子显微镜.
- 阶段场建模和第二原理计算用于理论分析.
- 响应软X射线衍射以确认性.
主要成果:
- 在密封的酸层中发现室温极气泡.
- 通过实验和理论方法证实了skyrmion数+1和chirality.
- 观察圆形二元化,验证气泡的奇拉性.
结论:
- 极地气泡是磁性气泡的电相应物.
- 这些结构为具有新兴性铁电器提供了途径.
- 潜在的应用包括电控负电容和先进的铁电功能.
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