Strong Correlation Between Superconductivity and Ferromagnetism in an Fe-Chalcogenide Superconductor
Strong Correlation Between Superconductivity and Ferromagnetism in an Fe-Chalcogenide Superconductor
复制标题
DOI：
10.1021/acs.nanolett.1c02424
复制
发表时间：
2021-08-20
期刊：
影响因子：
10.8
通讯作者：
Du, Chunhui Rita
中科院分区：
文献类型：
--
作者：
McLaughlin, Nathan J.;Wang, Hailong;Du, Chunhui Rita
拓扑学、超导性和磁性之间的相互作用有望在涌现的量子材料中带来过多的奇异和非直观的行为。Fe-硫族化物超导体FeTexSe 1-x由于其固有的拓扑能带结构、高温超导性和非常规的配对对称性而与此直接相关。尽管有巨大的希望和期望，FeTexSe 1-x的局部磁性在很大程度上仍未被探索，这阻碍了对其潜在材料特性的全面了解。利用金刚石中的氮空位（NV）中心，在这里，我们报告纳米级的量子传感和成像的剥离FeTexSe 1-x薄片产生的磁通量，表现出很强的超导电性和铁磁性FeTexSe 1-x之间的相关性。在已建立的拓扑超导体中，超导性和铁磁性的共存为探索量子材料中的奇异自旋和电荷输运现象提供了新的机会。NV中心和FeTexSe 1-x之间的耦合也可能在开发下一代基于固态的量子信息技术的混合架构中找到应用。
The interplay among topology, superconductivity, and magnetism promises to bring a plethora of exotic and unintuitive behaviors in emergent quantum materials. The family of Fe-chalcogenide superconductors FeTexSe1-x are directly relevant in this context due to their intrinsic topological band structure, high-temperature superconductivity, and unconventional pairing symmetry. Despite enormous promise and expectation, the local magnetic properties of FeTexSe1-x remain largely unexplored, which prevents a comprehensive understanding of their underlying material properties. Exploiting nitrogen vacancy (NV) centers in diamond, here we report nanoscale quantum sensing and imaging of magnetic flux generated by exfoliated FeTexSe1-x flakes, demonstrating strong correlation between superconductivity and ferromagnetism in FeTexSe1-x. The coexistence of superconductivity and ferromagnetism in an established topological superconductor opens up new opportunities for exploring exotic spin and charge transport phenomena in quantum materials. The demonstrated coupling between NV centers and FeTexSe1-x may also find applications in developing hybrid architectures for next-generation, solid-state-based quantum information technologies.