可调节的非常规旋转轨道扭矩磁化动力学在范德瓦尔斯异构结构中的动态
Lalit Pandey1,2, Bing Zhao3, Karma Tenzin4,5
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg, Sweden. lalit.pandey@chalmers.se.
Nature communications
|September 30, 2025
概括
研究人员在新的2D量子材料异构结构中探索了旋转轨道扭矩切换. 他们在室温下实现了节能,无磁场的磁化切换,为先进的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
- 量子材料 量子材料是一种量子材料.
背景情况:
- 两维 (2D) 量子材料异构结构对于开发节能,非挥发性自旋电子技术至关重要.
- 了解旋转轨道扭矩 (SOT) 现象对于推进这些技术至关重要,但关于旋转动态的实验数据是有限的.
研究的目的:
- 为了研究非传统的外平面磁化动态.
- 在范德瓦尔斯异构结构中演示能效和无场SOT切换.
- 阐明这些材料中电荷-自旋转换的基本机制.
主要方法:
- 使用Fe3GaTe2 (外平面磁体) 和TaIrTe4 (拓维尔半金属) 制造范德瓦尔斯异构结构.
- 测量非线性二哈尔信号以描述磁化动态.
- 分析晶体对称性和电子结构的第一原则计算,用于电荷-自旋转换.
主要成果:
- 展示了非常规的外平面磁化动力学.
- 在室温和低电流密度下实现了节能和确定性无磁场的SOT磁化切换.
- 在TaIrTe4/Fe3GaTe2装置中观察到大而可调节的缓冲式扭矩.
结论:
- 范德瓦尔斯的异构结构为节能,无电场和可调节的自旋电子设备提供了一个可行的平台.
- 这项研究揭示了TaIrTe4/Fe3GaTe2异构结构在下一代内存和逻辑应用中的潜力.
- 这些异构结构中的非传统的电荷-自旋转换机制与晶体对称性和电子性质有关.
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