在基于NbRe的异构结构中,快速动力学和放松时间
Francesco De Chiara1, Zahra Makhdoumi Kakhaki1,2, Francesco Avitabile1
1Dipartimento di Fisica "E. R. Caianiello", Università degli Studi di Salerno, I-84084 Fisciano (Sa), Italy.
Beilstein journal of nanotechnology
|February 18, 2026
概括
研究人员比较了超导/普通金属 (S/N) 和超导/铁磁 (S/F) 双层. 与NbRe/Au双层相比,NbRe/Py双层表现出更高的旋临界速度和更快的准粒子能量放松时间,显示出快速放松装置的潜力.
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
- 超导电性 超导电性 超导电性
背景情况:
- 超导异构结构对于先进的电子设备至关重要.
- 了解阿布里科索夫旋动力学是控制超导特性的关键.
- 将普通金属 (S/N) 和铁磁 (S/F) 接口进行比较,可以发现独特的行为.
研究的目的:
- 在NbRe/Au (S/N) 和NbRe/Py (S/F) 双层中研究阿布里科索夫动力学和流量流动不稳定性.
- 为了比较S/N和S/F异构结构之间的临界速度和准粒子能量放松时间.
- 评估这些异构结构在需要快速放松过程的应用中的潜力.
主要方法:
- 使用喷雾制造NbRe/Au和NbRe/Py异构的制造.
- 通过电力传输测量进行表征,包括I-V特征.
- 在Larkin-Ovchinnikov框架内分析流量流动的不稳定性.
主要成果:
- 与NbRe/Au双层相比,NbRe/Py双层显示了较高的旋临界速度.
- 提取了准粒子能量放松时间:NbRe/Au的~150 ps和NbRe/Py的~24 ps.
- 两层NbRe/Py呈现的放松次数比NbRe微桥的放松次数小一个数量级.
结论:
- 与NbRe/Au (S/N) 相比,NbRe/Py (S/F) 异构结构表现出增强的动力学和显著更快的准粒子能量放松.
- 观察到的特性表明,NbRe/Py双层对于开发依赖于快速放松现象的设备是有希望的.
- 这些发现有助于对超导中的S/F接口及其技术影响的基本理解.
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