在维尔铁磁体中观察异常的平面内霍尔效应的室温观测
Soumya Sankar1, Xingkai Cheng1, Tahir Murtaza1
1Department of Physics, The Hong Kong University of Science and Technology, Hong Kong SAR, China.
Nature communications
|December 4, 2025
概括
在拓上非碎的电子状态使室温异常的霍尔效应在Fe3Sn,一个Kagome金属. 这一发现为先进的自旋电子和磁传感技术铺平了道路.
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
- 量子现象是一种量子现象.
背景情况:
- 在拓上非碎的电子状态是新奇异常霍尔效应的关键.
- 室温异常的霍尔效应对磁传感,自旋电子和能量采集具有前景.
- 由于对称性约束,在在平面内磁场下的拓磁性材料中检测平面内异常的霍尔效应具有挑战性.
研究的目的:
- 提出并演示在室温下在kagome金属中异常的平面内霍尔效应.
- 为了研究kagome网格,旋转轨道合和倾斜铁磁的作用.
- 为增强异常霍尔效应设计拓薄膜异构结构.
主要方法:
- 卡戈梅金属Fe3Sn.的分子束表.
- 电池大厅效应测量. 电池大厅效应测量.
- 理论上的计算. 理论上的计算.
- 用Fe3Sn和CoFeB进行拓薄膜异构结构的合成.
主要成果:
- 在Fe3Sn中证明了室温异常的平面内霍尔效应.
- 他将这种效应归因于来自kagome网格,自旋轨道合和倾斜铁磁的拓维尔点.
- 在Fe3Sn/CoFeB异构结构中观察到异常增强的平面内霍尔效应振幅,这是由于磁迷路场造成的.
结论:
- 卡戈梅格子图案是一个可行的设计,用于诱导室温异常的平面内霍尔效应.
- 拓Weyl点对于实现这一现象至关重要.
- 工程异构结构为技术应用提供了一条控制和增强异常霍尔效应的途径.
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