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arXiv 2602.17399cond-mat.supr-concond-mat.str-el
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分数1/3量子涡流在手性d+id蜂窝超导体中的研究

Fractional $1/3$ quantum vortices in chiral $d+id$ kagome superconductors

Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯玻尔研究所);Department of Physics and Astronomy, Uppsala University(乌普萨拉大学物理与天文系)

Frederik A. S. Philipsen, Mats Barkman, Andreas Kreisel, Brian M. Andersen

AI总结:

研究揭示了手性d+id蜂窝超导体中分数1/3量子涡流的特性及其与子晶格自由度的关系。

摘要:

我们对chiral d+id超导体在蜂窝晶格上的涡流性质进行了理论研究。这项研究受到最近实验发展的影响,报告了kagome金属超导态中时间反演对称性破缺的证据。利用自洽微观计算,结合蜂窝晶格的能带结构特征,我们发现在外加磁场下,分数涡流渗透到基态凝聚态中。每个分数涡流携带1/3的超导磁通量子,并表现出与蜂窝晶格三个子晶格自由度之一相关的特征签名。我们讨论了这些结果对最近研究kagome超导体在外部磁场下的相关性。

英文摘要:

We perform a theoretical investigation of the nature of vortices in chiral $d+id$ superconductors on the kagome lattice. The study is motivated by recent experimental developments reporting evidence of time-reversal symmetry breaking in the superconducting state of kagome metals. Using self-consistent microscopic calculations that incorporate the characteristics of the band structure of the kagome lattice, we find that fractional vortices permeate the ground state condensate in the presence of an external field. Each fractional vortex carries one third of the superconducting flux quantum and exhibits a characteristic signature related to one of the three sublattice degrees of freedom of the kagome lattice. We discuss the relevance of these results to recent experimental studies of kagome superconductors in the presence of an external magnetic field.

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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