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arXiv 2102.04276cond-mat.supr-con
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非中心对称Ru $_7$ B $_3$中混合angular momentum对称性的光谱证据

Spectroscopic evidence of mixed angular momentum symmetry in non-centrosymmetric Ru$_7$B$_3$

Soumya Datta, Aastha Vasdev, Ranjani Ramachandran, Soumyadip Halder, Kapil Motla, Anshu Kataria, Arushi, Rajeswari Roy Chowdhury, Ravi Prakash Singh, Goutam Sheet

摘要:

缺乏反转对称性的超导晶体可以潜在地承载非常规配对。然而,到目前为止,没有直接的确凿的实验证据,这种非常规的序参量在非中心对称超导体已被报道。本文通过扫描隧道谱对超导能隙的直接测量,报道了非中心对称Ru $_7$ B $_3$中存在$s$波(单线态)和$p$波(三线态)对对称性。我们的温度和磁场依赖的研究还表明,单重态和三重态分量的序参量的相对振幅随温度的变化不同。

英文摘要:

Superconducting crystals with lack of inversion symmetry can potentially host unconventional pairing. However, till date, no direct conclusive experimental evidence of such unconventional order parameters in non-centrosymmetric superconductors has been reported. In this paper, through direct measurement of the superconducting energy gap by scanning tunnelling spectroscopy, we report the existence of both $s$-wave (singlet) and $p$-wave (triplet) pairing symmetries in non-centrosymmetric Ru$_7$B$_3$. Our temperature and magnetic field dependent studies also indicate that the relative amplitudes of the singlet and triplet components of the order parameter change differently with temperature.

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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