伪道磁电阻在扭曲的范德瓦尔斯Fe3GeTe2同质连接中
Reiji Obata1, Haiming Sun2, Kartik Samanta3
1Faculty of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa, 252-5258, Japan.
Advanced materials (Deerfield Beach, Fla.)
|January 6, 2025
概括
使用扭曲的Fe3GeTe2片的Twistronics工程创建了没有障碍的伪道磁电阻 (PTMR). 扭转角度控制PTMR,使新的反铁磁自旋电子应用成为可能.
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:
- Twistronics使用在特定角度对齐的范德瓦尔斯 (vdW) 材料.
- 扭曲的vdW连接显示了诸如超导,拓相和磁性等现象.
- 很少有研究探讨VDW连接处的大扭转角度,特别是高温超导体.
研究的目的:
- 为了组装磁性Fe3GeTe2 (FGT) 片的vdW同接点,具有大的扭转角度 (0°90°).
- 在这些没有道障碍的交叉点上调查伪道磁电阻 (PTMR) 的出现.
- 探索扭转角度作为PTMR和反铁磁旋转对齐的控制参数的作用.
主要方法:
- 使用薄磁性FGT片组装VDW同联接.
- 具有从0°到90°的扭转角度 (θt) 的连接点的制造.
- 分析TMR的扭转角度依赖的第一原则计算.
主要成果:
- vdW同接点表现出对扭转角度敏感的伪TMR (PTMR) 效应.
- vdW间隙充当道屏障,由 θt 控制.
- 大的θt值会导致格子不匹配和反铁磁 (AFM) 旋转对齐,影响PTMR大小.
结论:
- 扭曲的FGT同接点显示了一个可调整扭曲角度的PTMR效应.
- 这项研究强调了VDW隙工程在twistronics中的潜力.
- 这些交叉点为新型AFM旋转依赖现象和旋转器件提供了一个有前途的平台.
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