在无序超导体中的幅度施密德-希格斯模式的空间解析动力学
P A Nosov1, E S Andriyakhina2, I S Burmistrov3,4
1Harvard University, Department of Physics, Cambridge, Massachusetts 02138, USA.
Physical review letters
|August 18, 2025
概括
我们揭示了超导体中施密德-希格斯模式的新动态. 这些发现显示出独特的振荡和空间模式,为顺序参数振幅动态提供了独特的特征.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 超导和超流动性 超导和超流动性
背景情况:
- 无序的s波超导体和铁离子超流体表现出复杂的集体模式.
- 了解这些模式的动态对于描述异国情调的量子状态至关重要.
研究的目的:
- 为了研究集体振幅施密德-希格斯 (SH) 模式的空间解析动态.
- 在这些系统中识别订单参数振幅动态的独特特征.
主要方法:
- 在复杂频率平面中分析零温度SH易感性的分析结构.
- 在不同的连贯长度下检查系统行为,以平均自由路径比.
主要成果:
- 观测到频率为2Δ的晚时振荡 (1/t^2衰变) 和在很远的距离上观测到的亚扩散振荡 (z=4).
- 确定了指数式衰减的空间振荡,其周期差距接近2Δ.
- 发现SH模式诱导了第三和生成电流的额外峰值,从常规共振转移.
结论:
- 这项研究阐明了SH模式在无序超导体中独特的时空动态.
- 已识别的第三和生成峰值为顺序参数振幅动态提供了一个明确的实验特征.
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