论文标题
I型非中心BEAU超导体的多间隙响应
Multiple-gap response of type-I noncentrosymmetric BeAu superconductor
论文作者
论文摘要
通过MUON-SPIN旋转/放松技术进行了热力学关键场（$ b _ {\ rm c} $）的精确测量。 $ b _ {\ rm c} $的温度演变无法在单个间隙方案中描述，它需要至少存在两种不同类型的超导顺序参数。自洽的两间隙方法，适用于$ b _ {\ rm c}（t）$行为的分析，表明存在两个超大的能量差距，差距到$ t _ {\ rm c} $比率$2Δ/k _ {\ rm B} {\ rm b} $ \ simeq2.37 $分别用于大型和小间隙。这意味着BEAU中的超导性是非常规的，并且超级载波配对发生在各种能带。
Precise measurements of the thermodynamic critical field ($B_{\rm c}$) in type-I noncentrosymmetric superconductor BeAu were performed by means of the muon-spin rotation/relaxation technique. The temperature evolution of $B_{\rm c}$ can not be described within the single gap scenario and it requires the presence of at least two different types of the superconducting order parameters. The self-consistent two-gap approach, adapted for analysis of $B_{\rm c}(T)$ behavior, suggests the presence of two superconducing energy gaps with the gap to $T_{\rm c}$ ratios $2Δ/k_{\rm B}T_{\rm c}\simeq4.52$ and $\simeq2.37$ for the big and the small gap, respectively. This implies that the superconductivity in BeAu is unconventional and that the supercarrier pairing occurs at various energy bands.
