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arXiv 1009.3014cond-mat.supr-con
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三重态超导体的自旋敏感长程邻近效应

Spin-sensitive Long-ranged Proximity Effect for Triplet Superconductors

Gaetano Annunziata, Mario Cuoco, Canio Noce, Asle Sudbø, Jacob Linder

摘要:

非中心对称超导体(例如CePt $_3$ Si)和手征超导体(例如Sr $_2$ RuO $_4$)的发现需要实验方法来识别自旋三重态配对的存在。在这里,我们展示了一种方法,实现这一点在一个有吸引力的简单的方式:自旋敏感的邻近效应的铁磁$\mid$三重态超导双层。它示出了如何可以使用的字段的方向来明确区分不同的自旋三重态。此外,与传统的S $\mid$ F结相比,尽管存在交换场,甚至没有任何磁不均匀性,邻近效应仍变得长程。我们的研究结果可以通过STM光谱验证,并可能是有用的工具来表征非常规超导材料中的配对状态。

英文摘要:

The discovery of noncentrosymmetric superconductors, such as CePt$_3$Si, and chiral superconductors, such as Sr$_2$RuO$_4$, calls for experimental methods to identify the presence of spin-triplet pairing. We here demonstrate a method which accomplishes this in an appealingly simple manner: a spin-sensitive proximity effect in a ferromagnet$\mid$triplet superconductor bilayer. It is shown how the orientation of the field can be used to unambiguously distinguish between different spin-triplet states. Moreover, the proximity effect becomes long-ranged in spite of the presence of an exchange field and even without any magnetic inhomogeneities, in contrast to conventional S$\mid$F junctions. Our results can be verified by STM-spectroscopy and could be useful as a tool to characterize the pairing state in unconventional superconducting materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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