There has been enormous recent interest in heterostructures of two-dimensional van der Waals materials. Integrating materials with different quantum ground states in vertical heterostructures is predicted to lead to novel electronic properties that are not found in the constituent layers. Here, we present direct synthesis of a superconductor-magnet hybrid heterostructure by combining superconducting niobium diselenide (NbSe₂) with the monolayer vanadium diselenide (VSe₂). Molecular-beam epitaxy growth in ultra-high vacuum yields clean and atomically sharp interfaces. Combining different characterization techniques and density-functional theory calculations, we investigate the electronic and magnetic properties of VSe₂ on NbSe₂. Low temperature scanning tunneling microscopy measurements show an absence of the typical charge density wave on VSe₂ and demonstrate a reduction of the superconducting gap of NbSe₂ on the VSe₂ layer. This suggests magnetization of the VSe₂ sheet, at least on the local scale. Our work demonstrates superconducting-magnetic hybrid materials with potential applications in future electronics devices.

最近，人们对二维范德华材料的异质结构产生了极大的兴趣。预计在垂直异质结构中整合具有不同量子基态的材料会导致在组成层中未发现的新电子特性。在这里，我们介绍了通过将超导二硒化铌（NbSe ₂）与单层二硒化钒（VSe ₂）组合直接合成超导体-磁体混合异质结构的方法。超高真空中的分子束外延生长可产生干净且原子清晰的界面。结合不同的表征技术和密度泛函理论计算，我们研究了NbSe ₂上VSe ₂的电子和磁性。低温扫描隧道显微镜测量结果表明，在VSe ₂上不存在典型的电荷密度波，并证明了VSe ₂层上NbSe ₂的超导间隙减小。这表明至少在局部尺度上VSe ₂片的磁化。我们的工作演示了超导磁性混合材料在未来电子设备中的潜在应用。