Yu-Shiba-Rusinov states in the charge-density modulated superconductor NbSe2.

At low temperatures, charge-density-wave and superconducting order coexist in the quasi-two-dimensional material 2H-NbSe2. Here, we investigate the Yu-Shiba-Rusinov (YSR) states of individual Fe atoms adsorbed in hollow sites of the terminating Se surface. We find that the charge density wave (CDW) strongly modifies both the wavefunctions and the energies of the YSR states. Exploiting the incommensurate nature of the CDW, we can trace the YSR states as a function of adsorption site relative to the CDW in a detailed manner. Key features are reproduced in model calculations. Our results emphasize the importance of the detailed atomic-scale environment for the design of nanostructures from coupled YSR adsorbates.