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观察异常的霍尔效应在近距离合的Cr₂Ge₂Te₆/石墨烯异构结构

S Yao¹, L H Ye¹, C Liu¹

¹Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China. hqxu@pku.edu.cn.

|February 4, 2025

概括

引入磁力到石墨烯,研究人员使用磁性近距离效应来诱导旋转极化. 这导致了石墨烯中明显的异常霍尔效应,为自旋电子设备铺平了道路.

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
这就是Spintronics.

背景情况:

将磁性引入石墨烯对于独特的运输现象至关重要.
在石墨烯中实现受控磁性仍然是一个重大挑战.

研究的目的:

开发一种方法来诱导石墨烯的旋转极化.
为了研究磁绝缘体和石墨烯的界面上的磁性近距离效应.

主要方法:

使用Cr2Ge2Te6 (CGT) 和石墨烯制造异构结构.
对异常霍尔效应的实验观测和分析.
密度函数理论 (DFT) 计算以了解旋转相互作用.

主要成果:

在CGT/石墨烯异构结构中清楚观察异常的霍尔效应.
异常的霍尔电阻和CGT磁化之间的相关性.
排除了像洛伦兹力或载体共存这样的替代解释.

结论:

观察到的异常霍尔效应归因于由磁性近距离效应诱导的旋转极化.
DFT计算支持从CGT转移到石墨烯的旋转密度.
这项工作为石墨烯的旋转极化提供了一种可行的方法,推进了石墨烯旋转电子学.

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