超导系统中奇频配对的广义条件
Generalized conditions for odd-frequency pairing in superconducting systems
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中文总结 AI 辅助
本文提出了适用于所有超导系统的奇频配对广义充要条件，推广了先前多带体超导体的一阶表达式，并应用于超导-铁磁体、约瑟夫森结及邻近化单层等系统以理解其超导性质。
中文摘要 AI 辅助
奇频超导配对已被预测出现在许多系统中，并已知会导致顺磁迈斯纳响应和长程超导邻近效应等现象。在此，我们提供了任何超导系统（从体超导体到超导混合结构）中出现奇频配对的广义必要且充分条件。这将先前在多带体超导体中的一阶表达式推广到所有超导系统及所有阶数，涵盖序参量和频率两个方面。随后，我们将导出的条件应用于多个系统，包括超导-铁磁体和超导约瑟夫森结，以及由常规超导体邻近化的过渡金属二硫化物单层，其中广义条件用于理解超导态的性质。
英文摘要
Odd-frequency superconducting pairing has been predicted to arise in many systems and is known to lead to phenomena such as paramagnetic Meissner response and long-range superconducting proximity effect. Here, we provide generalized necessary and sufficient conditions for odd-frequency pairing appearing in any superconducting system, from bulk superconductors to superconducting hybrid structures. This generalizes an earlier first-order expression in multiband bulk superconductors to all superconducting systems and to all orders, in both order parameter and frequency. We then apply the derived conditions to several systems, including superconducting-ferromagnet and superconducting Josephson junctions, as well as a transition metal dichalcogenide monolayer proximitized by a conventional superconductor, where the generalized conditions are used to understand the properties of the superconducting state.
发表机构
- Uppsala University（乌普萨拉大学）
- Wallenberg Initiative Materials Science for Sustainability, Uppsala University（乌普萨拉大学瓦伦伯格可持续材料科学倡议）
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