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在超导魔鬼结构中的可调节微波频率上产生周期阶段滑动和频率
Axel J M Deenen1, Dirk Grundler1,2
1Laboratory of Nanoscale Magnetic Materials and Magnonics, Institute of Materials (IMX), School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Vaud. Switzerland.
ACS nanoscience Au
|October 20, 2025
概括
研究人员使用模拟探索了3D (Nb) 超导体中的相位滑动. 他们发现直流 (DC) 驱动GHz振荡,而交流电 (AC) 调制产生微波频率,为3D冷电子铺平了道路.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子技术 量子技术 量子技术
- 纳米技术 纳米技术
背景情况:
- 超导体表现出宏观相连贯性,这对于冷电子和量子技术至关重要.
- 3D纳米制造的进步使得超导体能够在芯片上集成.
- 运输电流下的3D超导纳米结构中的无平衡现象尚未得到充分探索.
研究的目的:
- 为了数值地研究3D管状 (Nb) 超导体中的相位滑动,具有中心收缩.
- 分析直流 (DC) 和交流 (AC) 输送电流对相位滑动动力学的影响.
主要方法:
- 使用数值模拟来建模超导纳米结构的行为.
- 该研究的重点是相位滑动,即超导顺序参数中的离散2π跳跃.
- 在模拟系统中应用了直流和交流传输电流.
主要成果:
- 在直流驱动下,系统呈现周期性相位滑动,导致GHz电压振荡.
- 引入交流频率调制产生了微波频率.
- 生成的频率显示出特征性依赖于移动和相位滑动之间的相互作用.
结论:
- 这项研究揭示了3D超导纳米结构中的新型不平衡现象.
- 这些发现表明,开发芯片上的频发电机有潜力.
- 这项研究为3D冷电子和量子设备应用开辟了新的途径.
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