微波辅助单向超导在Al-InAs中 纳米线-Al连接处在磁场下的超导
Haitian Su1,2, Ji-Yin Wang3, Han Gao1
1Beijing Key Laboratory of Quantum Devices, Key Laboratory for the Physics and Chemistry of Nanodevices, and School of Electronics, <a href="https://ror.org/02v51f717">Peking University</a>, Beijing 100871, China.
Physical review letters
|September 6, 2024
概括
研究人员在微波辐射下观察到Al-InAs纳米线Josephson连接处增强的超导二极管效应. 这种显示单向超导的效应可以通过微波电源和磁场调整,这表明了超越当前模型的新物理学.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子材料是一种量子材料.
背景情况:
- 超导二极管效应描述了在特定条件下的超导体中的不对称的关键电流.
- 单向超导,是二极管效应的一个关键方面,对于先进的超导电子来说至关重要.
研究的目的:
- 为了研究Al-InAs纳米线-AlJosephson连接处的超导二极管效应.
- 探索微波辐射和磁场对单向超导的影响.
主要方法:
- 制造Al-InAs纳米线-Al约瑟夫森连接器. 制造Al-InAs纳米线-Al约瑟夫森连接器.
- 在不同微波功率和磁场下对电压电流特性进行实验测量.
主要成果:
- 随着微波功率的增加,观察到超导二极管效应的增强.
- 在高微波驱动振幅下实现单向超导.
- 证明磁场方向的反转会改变偏移的标志.
- 在强电场下,观察到偏移大小对微波功率 (以dBm) 的近线性反应.
结论:
- 微波辐射显著增强了这些连接处的超导二极管效应.
- 观察到的现象与理论预测一致,但在某些方面偏离,表明了新的机制.
- 与非平衡动力学或驱动超导系统中的消散相关的新物理学潜力.
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