期刊
PHYSICAL REVIEW LETTERS
卷 100, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.097002
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A complex structure of the superconducting order parameter in Ln(2)C(3) (Ln=La,Y) is demonstrated by muon spin relaxation measurements in their mixed state. The muon depolarization rate [sigma(nu)(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 sigma(nu)(T).
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