arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0801.4176cond-mat.supr-con
收藏

La $_2$ C PDMATHAAB和Y $_2$ C $_3$的多能隙超导性

Multigap superconductivity in sesquicarbides La$_2$C$_3$ and Y$_2$C$_3$

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

摘要:

用μ子自旋弛豫($μ$ SR)测量了混合态下$Ln_2$ C $_3$($Ln$ = La,Y)超导序参量的复杂结构.μ子去极化率[ $σ_{\rm v}(T)$ ]具有特征温度依赖性,可以完美地描述了一个唯象的双间隙模型无节点超导。虽然La $_2$ C $_3$和Y $_2$ C $_3$之间两个能隙的大小相似,但在$σ_{\rm v}(T)$的行为中清楚地观察到这两种情况之间带间耦合的显著差异。

英文摘要:

A complex structure of the superconducting order parameter in $Ln_2$C$_3$ ($Ln$ = La, Y) is demonstrated by muon spin relaxation ($μ$SR) measurements in their mixed state. The muon depolarization rate [$σ_{\rm v}(T)$] 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 La$_2$C$_3$ and Y$_2$C$_3$, a significant difference in the interband coupling between those two cases is clearly observed in the behavior of $σ_{\rm v}(T)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑