金属性和异常的霍尔效应在表轴应力,原子薄的RuO薄膜中2
Seung Gyo Jeong1, Seungjun Lee2, Bonnie Lin3
1Department of Chemical Engineering and Materials Science, University of Minnesota-Twin Cities, Minneapolis, MN 55455.
概括
超细压力二氧化膜在较低的磁场上表现出异常的霍尔效应 (AHE). 长轴应变工程增强了这些金属变磁膜的磁性,用于旋转电子.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 这就是Spintronics.
背景情况:
- 异常的霍尔效应 (AHE) 表示时间逆转对称性破裂.
- 鲁二氧化是一种有争议的金属变磁材料.
- 以前在RuO2中进行的AHE观测需要高磁场和厚薄膜.
研究的目的:
- 为了研究超薄,应力RuO2薄膜中的AHE.
- 探索应变工程对RuO2.2中磁性的影响.
- 为了使AHE在较低的磁场上进行检测.
主要方法:
- 超薄TiO2/RuO2/TiO2 (110) 异构结构的生长,使用混合分子束表.
- 张力膜中的金属性和AHE的表征.
- 密度函数理论 (DFT) 计算以了解磁性质.
主要成果:
- 超薄压力RuO2薄膜保持金属性.
- 在显著较低的磁场 (<9 T) 观察到相当大的AHE.
- 发现轴应变可以稳定非补偿的磁性基态,并重新配置磁性排序.
结论:
- 超薄的RuO2作为应变工程磁性的一个有前途的平台.
- 经轴设计可以通过启用AHE检测来推进自旋电子技术.
- 这项工作克服了先前关于AHE在RuO2.0中的研究的局限性.
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