Type-I superconductivity in Al6Re
Type-I superconductivity in Al6Re
复制标题
Al6Re 中的 I 型超导
DOI：
10.1103/physrevb.99.144519
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发表时间：
2019-04-22
影响因子：
3.7
通讯作者：
Feng, Donglai
中科院分区：
文献类型：
--
作者：
Peets, Darren C.;Cheng, Erjian;Feng, Donglai
虽然纯元素往往表现出 I 型超导性，而不是 II 型超导性，但几乎所有化合物超导体都是 II 型超导，只有少数已知的例外。我们报告了铝化铼 Al$_6$Re 的单晶生长和物理特性，根据磁化强度、交流磁化率和比热测量，我们得出结论，它是一种 I 型超导体。尽管 Al$_6$Re 与不超导的 W 和 Mo 铝化物家族非常相似，但对超导性的检测表明，这些铝化物是确定价电子数和反转对称性在确定材料是否超导方面的相对重要性的理想测试平台。
While the pure elements tend to exhibit Type-I rather than Type-II superconductivity, nearly all compound superconductors are Type-II, with only a few known exceptions. We report single crystal growth and physical characterization of the rhenium aluminide Al$_6$Re, which we conclude is a Type-I superconductor based on magnetization, ac-susceptibility, and specific-heat measurements. This detection of superconductivity, despite the strong similarity of Al$_6$Re to a family of W and Mo aluminides that do not superconduct, suggests that these aluminides are an ideal testbed for identifying the relative importance of valence electron count and inversion symmetry in determining whether a material will superconduct.