Pr1-xLaxPt4Ge12不同La掺杂浓度下的超导性质数据集

我们对Pr1-xLaxPt4Ge12，x=0.1，0.2，0.3，0.5，0.7, 0.9进行了比热测量、磁化率测量、XRD以及零场与纵场缪子自旋旋转弛豫实验。零场?SR观察 到超导态内存在自发的磁场分布展宽增加，而其同构材料LaPt4Ge12 却没有显示这一行为，这是PrPt4Ge12 中存在非常规超导行为，并具有TRS破缺现象 的 有 力 证 据。前期已有工作利用Ce掺杂PrPt4Ge12，通过研究Ce 掺杂破坏PrPt4Ge12 体系中的超导库珀对，来尝试揭示其超导机制。但是Pr1-xCexPt4Ge12 的 TRS 破缺超导序参量中面临的主要问题之一是 Ce 掺杂本身破坏了超导库珀对的形成，直接压制了超导，大幅改变了能隙对称性。Ce 作为典型的 4f 电子近藤杂质进入 PrPt4Ge12 后，超导配对对称机制立刻产生了变化，尽管相应的近藤效应超导模型能一定程度上描述该体系中?c与 Ce 含量的依赖关系，但是体系中的物理行为由于 Ce 的引入已经变得更为复杂。因此，对直接解释 PrPt4Ge12 超导能隙配对对称性提供的有效信息相对有限。幸运的是， Pr1-xLaxPt4Ge12 体系为研究 PrPt4Ge12 超导配对对称性提供了新的平台。该课题对于推动重费米子态以及中间价态内的多体效应等理论发展具有重大作用。数据量410MB。

We performed specific heat measurements, magnetic susceptibility measurements, X-ray diffraction (XRD), and zero-field and longitudinal-field muon-spin rotation and relaxation (μSR) experiments on Pr₁₋ₓLaₓPt₄Ge₁₂ with x = 0.1, 0.2, 0.3, 0.5, 0.7, and 0.9. Zero-field μSR observations revealed an enhanced broadening of the spontaneous magnetic field distribution in the superconducting state, whereas its isomorphic counterpart LaPt₄Ge₁₂ exhibited no such behavior, which provides strong evidence for the unconventional superconducting behavior and time-reversal symmetry (TRS) breaking in PrPt₄Ge₁₂. Previous work has utilized Ce-doped PrPt₄Ge₁₂ to attempt to reveal the superconducting mechanism of PrPt₄Ge₁₂ by investigating how Ce doping disrupts the formation of superconducting Cooper pairs in the PrPt₄Ge₁₂ system. However, one of the core challenges in studying the TRS-breaking superconducting order parameter of Pr₁₋ₓCeₓPt₄Ge₁₂ is that Ce doping itself disrupts the formation of superconducting Cooper pairs, directly suppresses superconductivity, and drastically alters the symmetry of the superconducting energy gap. When Ce, a typical 4f-electron Kondo impurity, is introduced into PrPt₄Ge₁₂, the superconducting pairing symmetry mechanism immediately changes. Although the corresponding Kondo effect-based superconducting model can describe the dependence of the superconducting critical temperature T_c on the Ce doping concentration to a certain extent, the physical properties of the system become significantly more complex due to the introduction of Ce. Therefore, such studies provide relatively limited effective information for directly interpreting the superconducting pairing symmetry of the energy gap in PrPt₄Ge₁₂. Fortunately, the Pr₁₋ₓLaₓPt₄Ge₁₂ system offers a new platform for investigating the superconducting pairing symmetry of PrPt₄Ge₁₂. This research plays a crucial role in advancing the theoretical development of heavy fermion states and many-body effects in intermediate valence states. The total dataset size is 410 MB.