Multigap superconductivity in sesquicarbides La2C3 and Y2C3

S. Kuroiwa, Y. Saura, J. Akimitsu, M. Hiraishi, M. Miyazaki, K. H. Satoh, S. Takeshita, R. Kadono

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70 Citations (Scopus)


A complex structure of the superconducting order parameter in Ln2C3 (Ln=La,Y) is demonstrated by muon spin relaxation measurements in their mixed state. The muon depolarization rate [σv(T)] exhibits a characteristic temperature dependence that can be perfectly described by a phenomenological double-gap model for nodeless superconductivity. While the magnitude of two gaps is similar between La2C3 and Y2C3, a significant difference in the interband coupling between those two cases is clearly observed in the behavior of σv(T).

Original languageEnglish
Article number097002
JournalPhysical Review Letters
Issue number9
Publication statusPublished - Mar 6 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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