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Description
We investigate the electronic and magnetic properties of manganese phthalocyanine (MnPc) molecules adsorbed on the Pb(001) surface, extending previous studies on MnPc/Pb(111). In contrast to the isotropic Fermi surface of Pb(111), Pb(001) exhibits pronounced anisotropy, providing a unique platform to explore anisotropy-driven effects in impurity–superconductor systems. Using scanning tunneling microscopy and spectroscopy, we observe well-defined Yu–Shiba–Rusinov (YSR) states associated with magnetic impurities. The spatial and energy-resolved spectra reveal clear anisotroic features, reflecting the underlying electronic structure of the substrate. Our results demonstrate that the anisotropic Fermi surface of Pb(001) plays a crucial role in shaping the spectral characteristics and spatial distribution of YSR states. In addition, the relationship between YSR states and the Kondo effect is systematically characterized. These findings provide new insights into the influence of substrate anisotropy on impurity-induced bound states in superconductors and contribute to a deeper understanding of magnetic adsorbates on anisotropic superconducting surfaces.