论文标题
无节性磁性kagome超导体ceru $ _2 $的本地光谱证据
Local spectroscopic evidence for a nodeless magnetic kagome superconductor CeRu$_2$
论文作者
论文摘要
我们报告了有关Kagome超导性超导性和磁性的微观特性的MUON自旋旋转（$μ$ sr）实验，并带有$ t _ {\ rm c} $〜$〜$〜$ {\ simeq} $ 〜5〜5〜5〜5〜k。从与温度相关的磁穿透深度$λ$的测量值中，超导顺序参数表现出无节性配对，最适合各向异性$ s $ s $ wave间隙对称性。我们进一步表明，$ t _ {\ rm c} $/$/$λ^{ - 2} $比率与非常规超导体相当。此外，零视野（ZF）的强大组合 - $ $ $ $ sr和高场$ $ $ $ sr已用于发现三个特征温度的磁反应，被确定为$ t_1^*$〜$〜$ {\ simeq} $ 〜110〜110〜110〜1 $ t_3^*$〜$ {\ simeq} $ 〜40〜K。我们的实验将CERU $ _ {2} $分类为一种极为罕见的无节性磁性kagome超导体。
We report muon spin rotation ($μ$SR) experiments on the microscopic properties of superconductivity and magnetism in the kagome superconductor CeRu$_{2}$ with $T_{\rm c}$~${\simeq}$~5~K. From the measurements of the temperature-dependent magnetic penetration depth $λ$, the superconducting order parameter exhibits nodeless pairing, which fits best to an anisotropic $s$-wave gap symmetry. We further show that the $T_{\rm c}$/$λ^{-2}$ ratio is comparable to that of unconventional superconductors. Furthermore, the powerful combination of zero-field (ZF)-$μ$SR and high-field $μ$SR has been used to uncover magnetic responses across three characteristic temperatures, identified as $T_1^*$~${\simeq}$~110~K, $T_2^*$~${\simeq}$~65~K, and $T_3^*$~${\simeq}$~40~K. Our experiments classify CeRu$_{2}$ as an exceedingly rare nodeless magnetic kagome superconductor.
