超薄的范德瓦尔斯磁道结基于六角化的单原子空位
Halimah Harfah1, Yusuf Wicaksono2, Gagus Ketut Sunnardianto3,4,5
1Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-Cho, Toyonaka, Osaka 560-0043, Japan. harfah.h@opt.mp.es.osaka-u.ac.jp.
Physical chemistry chemical physics : PCCP
|March 12, 2024
概括
我们开发了一种基于石墨烯的新型磁道结,使用在六角化中的空缺. 这种结构具有很高的道磁阻比,为先进的自旋电子设备铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 范德瓦尔斯的异构结构提供可调节的电子和磁性特性.
- 磁道连接 (MTJ) 是自旋电子设备中的关键组件.
- 石墨烯和六角化是异构结构的有希望的二维材料.
研究的目的:
- 提出一个新的基于范德瓦尔斯的磁道结 (MTJ) 使用石墨烯和六边形化 (hBN) 具有单原子空缺.
- 为了研究设计的MTJ的磁性,电子结构和电子传输.
- 探索旋转控制的潜力,并实现高道磁阻 (TMR) 比率.
主要方法:
- 密度函数理论 (DFT) 用于磁性属性和电子结构计算.
- 兰道尔-布蒂克尔形式主义与非平衡 传输概率的绿色函数方法.
- 调查空缺周围州的局部密度 (VB).
主要成果:
- 由于hBN层中的空缺,在费米能量附近设计了一个Stoner缺口.
- 在hBN (VB) 层的平行 (PC) 和反平行 (APC) 磁体配置中观察到不同的电子传输概率.
- 在hBN ((VB) /Gr/hBN ((VB) 系统中实现了大约400%的高TMR比率,这是这个薄型MTJ的最高水平.
结论:
- 拟议的MTJ设计具有hBN层中的单原子空缺,可以控制旋转的行为.
- 工程设计的斯通纳隙和观察到的高TMR比率表明了这种VDW异构结构在旋转电子应用中的潜力.
- 这项工作为实现超薄,高性能磁道连接提供了有前途的途径.
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