Coupling different superconducting states at oxide interfaces

氧化物界面处不同超导态的耦合

• 批准号: 1799492
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1799492
• 关键词: Coupling; different; superconducting; states; oxide

The vast majority of known superconductors are spin singlet meaning the Cooper pairs of electrons have antiparallel spins. There are only a few known compounds which show intrinsic (p-wave) triplet superconductivity (most notably Sr2RuO4 (SRO) which is key to this PhD research). The triplet pairing in SRO is even frequency and is conceptually different to the odd-frequency triplet pairing induced in ferromagnets via proximity effect to conventional (s-wave) superconductors. However, there are theoretical predictions that alternative pairing states can be induced at surfaces which raise the prospect of coupling between different superconducting orders via engineered proximity effects. The aim of this PhD is to investigate this coupling and apply it to create thin films and device structures of SRO which have not previously been feasible.

绝大多数已知的超导体都是自旋单线态，这意味着库珀电子对具有反平行自旋。只有少数已知的化合物表现出本征（p波）三重态超导性（最明显的是Sr2RuO4 (SRO)，这是本博士研究的关键）。SRO中的三重态配对是偶频的，在概念上不同于铁磁体中由传统（s波）超导体的邻近效应引起的奇频三重态配对。然而，有理论预测，可以在表面诱导不同的配对状态，这提高了通过工程接近效应在不同超导级之间耦合的前景。本博士的目的是研究这种耦合，并将其应用于制造以前不可行的SRO薄膜和器件结构。

项目成果

Pulsed laser deposition of superconducting Sr2RuO4 thin-films and the role of crystallographic defects

超导 Sr2RuO4 薄膜的脉冲激光沉积及其晶体缺陷的作用

• DOI: 10.17863/cam.59205
• 发表时间: 2020
• 作者: Palomares Garcia C