AI 中文总结
该研究构建Fe纳米斯格明子晶格与Nb(110)超导衬底的异质结，发现交换耦合增强会抑制超导性，为拓扑超导异质结设计提供了微观约束。
AI 中文摘要
人工构建的磁体-超导体异质结近期被视为研究拓扑超导的有前景平台。除铁磁和反铁磁结构外，将非共线自旋纹理（如斯格明子晶格）与超导体耦合，为创建和操控非常规超导态提供了令人兴奋的途径。本研究通过在Nb(110)表面外延生长的Ir(111)薄膜上制备单层Fe，实现了纳米斯格明子晶格与超导衬底邻近耦合的异质结。扫描隧道谱显示，Fe纳米斯格明子晶格会抑制超导性，使超导能隙和相干峰均消失。紧束缚计算表明，随着交换耦合增强，能隙会逐渐被填充，最终超导性被淬灭。这些结果为基于磁体-超导体异质结设计拓扑非平凡态揭示了微观约束条件。
英文摘要
Engineered magnet-superconductor hybrids have recently been identified as promising platforms for the investigation of topological superconductivity. Beyond ferro- and antiferromagnetic structures, coupling non-collinear spin textures, such as skyrmion lattices, to superconductors offers an exciting route for creating and manipulating unconventional superconducting states. In this work, by preparing monolayer Fe on Ir(111) thin films grown epitaxially on a Nb(110) surface, we realize a hybrid system of a nano-skyrmion lattice proximitized to a superconducting substrate. Scanning tunneling spectroscopy shows that superconductivity becomes suppressed by the Fe nano-skyrmion lattice, with both the superconducting gap and coherence peaks disappearing. Tight-binding calculations reveal that with increasing exchange coupling, the gap is progressively filled up and eventually superconductivity gets quenched. These results reveal microscopic constraints for designing topologically non-trivial states based on magnet-superconducting heterostructures.
