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关于在范德瓦尔斯道交叉口的全电动Skymion检测的建议

Dongzhe Li¹, Soumyajyoti Haldar², Stefan Heinze^2,3

¹CEMES, Université de Toulouse, CNRS, 29 rue Jeanne Marvig, F-31055 Toulouse, France.

|February 13, 2024

概括

现在可以使用纯电方法可靠地检测2D vdW磁铁中的磁性 skyrmions. 这项研究表明,在VDW道连接处,巨大的磁阻效应用于先进的 skyrmion 检测.

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
量子运输是一种量子运输.

背景情况:

磁性 skyrmions 对数据存储有希望,但在二维范德瓦尔斯 (vdW) 材料中检测它们仍然是一个挑战.
当前的检测方法往往缺乏原子薄系统所需的分辨率或可靠性.

研究的目的:

为了证明在2D vdW材料中完全电气检测磁性 skyrmions的可行性.
调查VDW道交叉点中的巨型磁阻效应,以增强 skyrmion 检测.

主要方法:

使用非平衡格林函数方法进行第一原理计算和严格的量子运输模拟.
平面道交叉点的建模,包括超出Tersoff-Hamann近似的自我能量效应.
在特定的vdW异构结构中分析道化异型磁电阻 (TAMR) 和非线性磁电阻 (NCMR).

主要成果:

预测在石墨/Fe3GeTe2/德国烯/石墨vdW道交叉点中的非常大的TAMR和巨大的NCMR值.
确定了表面原子的p和d轨道状态之间的自旋混合,作为巨型NCMR的起源.
与扫描道显微镜 (STM) 几何相比,在道结处显著增强磁阻.

结论:

在使用平面道连接处的2D vdW磁铁中,完全电动的 skyrmion检测是可行的.
拟议的方法提供了一种高度灵敏的方法,用于检测原子级磁性 skyrmions.
轨道对称性在接口上的匹配对于增强磁阻效应至关重要.

关键词:

磁性 skyrmions 的使用情况.非对线性磁电阻是非对线性的.量子运输是一种量子运输.旋转电子技术 (spintronics) 是一个范德瓦尔斯道交叉点道交叉点

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