AI 中文总结
本研究通过μSR技术探究含磁性元素的Cr基等原子比高熵合金Cr-V-Ti-Nb-Ta的超导基态，发现其具备体心II型超导性，确立该合金为研究无序、磁性与超导性相互作用的有潜力平台。
AI 中文摘要
高熵合金超导体具有极端化学无序和复杂电子环境的特征，作为探索无序材料中超导性的模型系统受到广泛关注。本研究对含磁性3d元素的Cr基等原子比高熵合金Cr-V-Ti-Nb-Ta展开研究，为探究高无序体系中磁性元素对超导性的影响提供了契机。尽管存在预期的磁性对破坏效应，该合金仍呈现体心II型超导性，转变温度为T_c=2.33(3) K，且具有高上临界场。横向场μSR测量显示其s波超导能隙接近BCS值，零场μSR测量表明时间反演对称性得以保留。这些结果确立Cr-V-Ti-Nb-Ta为研究高熵合金中无序、磁性与超导性相互作用的有潜力平台。
英文摘要
High-entropy alloy superconductors, characterized by extreme chemical disorder and complex electronic environments, have attracted significant attention as model systems for exploring superconductivity in disordered materials. Here, we investigate a Cr-based equiatomic HEA, Cr-V-Ti-Nb-Ta, which contains a magnetic 3d element, providing an opportunity to examine the influence of magnetic elements on superconductivity in highly disordered systems. Despite expected magnetic pair-breaking, this alloy exhibits bulk type-II superconductivity with a transition temperature of $T_c = 2.33(3)$ K and a high upper critical field. Transverse-field $μ$SR measurements reveal an s-wave superconducting gap close to the BCS value, while zero-field $μ$SR suggests preserved time-reversal symmetry. These results establish Cr-V-Ti-Nb-Ta as a promising platform for exploring the interplay between disorder, magnetism and superconductivity in high entropy alloys.
Comments10 pages, 6 figures
