Strong suppression of superconductivity by divalent ytterbium Kondo holes in CeCoIn 5

@article{Shimozawa2012StrongSO,
  title={Strong suppression of superconductivity by divalent ytterbium Kondo holes in CeCoIn 5},
  author={Masaaki Shimozawa and Tatsuya Watashige and S. Yasumoto and Yuta Mizukami and M. Nakamura and Hiroaki Shishido and Swee K. Goh and Takahito Terashima and Takasada Shibauchi and Y. Matsuda},
  journal={Physical Review B},
  year={2012},
  volume={86}
}
To study the nature of partially substituted Yb-ions in a Ce-based Kondo lattice, we fabricated high quality Ce_{1-x}Yb_xCoIn_5 epitaxial thin films using molecular beam epitaxy. We find that the Yb-substitution leads to a linear decrease of the unit cell volume, indicating that Yb-ions are divalent forming Kondo-holes in Ce_{1-x}Yb_xCoIn_5, and leads to a strong suppression of the superconductivity and Kondo coherence. These results, combined with the measurements of Hall effect, indicate that… 

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