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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Abstract

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
Volume100
Issue number9
DOIs
Publication statusPublished - Mar 6 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kuroiwa, S., Saura, Y., Akimitsu, J., Hiraishi, M., Miyazaki, M., Satoh, K. H., Takeshita, S., & Kadono, R. (2008). Multigap superconductivity in sesquicarbides La2C3 and Y2C3. Physical Review Letters, 100(9), [097002]. https://doi.org/10.1103/PhysRevLett.100.097002