基于反铁磁铁的电压控制的高带宽特拉赫兹振荡器
Mike A Lund1, Davi R Rodrigues2, Karin Everschor-Sitte3
1Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway.
Physical review letters
|October 28, 2023
概括
具有kagome结构的非线性反铁磁体表现出可调节的太赫兹 (THz) 自震荡. 电气控制的旋转轨道扭矩使频率调制成为可能,提供了新的THz设备.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 这就是Spintronics.
- 材料科学 材料科学 材料科学
背景情况:
- 开发紧的太赫兹 (THz) 频率发生器和传感器是一个重要的技术障碍.
- 非线性反铁磁体 (NCAFMs) 正在探索它们在THz应用中的潜力.
研究的目的:
- 通过使用NCAFMs在THz模式中演示电压控制的频率生成.
- 为了研究 kagome 结构的 NCAFMs 中自振动的可调性和动态.
主要方法:
- 推导一个有效的理论来建模旋转轨道扭矩 (SOT) 和自动振荡动力学.
- 对反应性和消散性SOT贡献的分析.
- 调查NCAFMs中依赖于度的动态.
主要成果:
- 具有kagome结构的NCAFMs表现出无间隙的自我振荡.
- 频率可以通过电感应的SOT从0Hz调整到THz范围.
- 基态的奇拉性极大地影响激发特性,在某种情况下使无间隙振荡成为可能.
结论:
- NCAFMs为创建可调 THz 功能组件提供了一个有前途的平台.
- 这些发现可能有助于弥合THz技术现有的差距.
- 该研究强调了NCAFMs在下一代电子设备中的潜力.
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