Local quasiparticle states around impurities provide essential insight into the mechanism of unconventional superconductivity, especially when the candidate materials are proximate to an antiferromagnetic Mott-insulating phase. While such states have been reported in atom-based cuprates and iron-based compounds, they are unexplored in organic superconductors which feature tunable molecular orientation. Here we employ scanning tunneling microscopy and spectroscopy to reveal multiple forms of robustness of an exotic s-wave superconductivity in epitaxial Rb₃C₆₀ films against merohedral disorder, non-magnetic single impurities and step edges at the atomic scale. Yu-Shiba-Rusinov (YSR) states, induced by deliberately incurred Fe adatoms that act as magnetic scatterers, have also been observed. The YSR bound states show abrupt spatial decay and vary in energy with the Fe adatom registry. These results and a doping-dependent study of superconductivity point towards local electron pairing in which the multiorbital electronic correlations and intramolecular phonons together drive the high-temperature superconductivity of doped fullerenes.

杂质周围的局部准粒子状态提供了对非常规超导机制的重要洞察，尤其是当候选材料接近反铁磁莫特绝缘相时。虽然在基于原子的铜酸盐和基于铁的化合物中已经报道了这种状态，但它们在具有可调分子取向的有机超导体中尚未被探索。在这里，我们采用扫描隧道显微镜和光谱学来揭示外延 Rb ₃ C _{60 中}奇异s波超导性的多种形式的稳健性在原子尺度上对抗多面体无序、非磁性单一杂质和阶梯边缘的薄膜。Yu-Shiba-Rusinov (YSR) 状态，由故意产生的 Fe 吸附原子引起，作为磁性散射体，也被观察到。YSR 束缚态显示出突然的空间衰减，并且能量随 Fe 吸附原子注册表而变化。这些结果和对超导性的依赖于掺杂的研究指向局部电子配对，其中多轨道电子相关性和分子内声子共同驱动掺杂富勒烯的高温超导性。