Specific-heat evidence for two-gap superconductivity in the ternary-iron silicide Lu2Fe3Si5.

@article{Nakajima2008SpecificheatEF,
  title={Specific-heat evidence for two-gap superconductivity in the ternary-iron silicide Lu2Fe3Si5.},
  author={Yasuyuki Nakajima and Tsuyoshi Nakagawa and Tsuyoshi Tamegai and Hisatomo Harima},
  journal={Physical review letters},
  year={2008},
  volume={100 15},
  pages={
          157001
        }
}
We report low-temperature specific-heat studies on the single-crystalline ternary-iron silicide superconductor Lu(2)Fe(3)Si(5) with T(c)=6.1 K down to approximately T(c)/20. We confirm a reduced normalized jump in specific heat at T(c), and find that the specific heat divided by temperature C/T shows a sudden drop at approximately T(c)/5 and goes to zero with further decreasing temperature. These results indicate the presence of two distinct superconducting gaps in Lu(2)Fe(3)Si(5), similar to… 
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