Cuperus Jan P, Kole Arnold H, Botello-Méndez Andrés R, Zanolli Zeila, Vanmaekelbergh Daniel, Swart Ingmar
Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, The Netherlands.
NPJ Quantum Mater. 2025;10(1):51. doi: 10.1038/s41535-025-00759-2. Epub 2025 May 27.
Magnet/superconductor hybrid systems have been put forward as a platform for realizing topological superconductivity. We investigated the heterostructure of ferromagnetic monolayer CrCl and superconducting NbSe. Using low-temperature scanning tunneling microscopy, we observe topologically trivial Yu-Shiba-Rusinov (YSR) states localized at the edge of CrCl islands. DFT simulations reveal that the Cr atoms at the edge have an enhanced -orbital DOS close to . This leads to an exchange coupling between these atoms and the substrate that rationalizes the edge-localization of the YSR states.
磁体/超导体混合系统已被提出作为实现拓扑超导的一个平台。我们研究了铁磁单层CrCl和超导NbSe的异质结构。利用低温扫描隧道显微镜，我们观察到位于CrCl岛边缘的拓扑平凡的宇 - 芝田 - 鲁西诺夫（YSR）态。密度泛函理论模拟表明，边缘处的Cr原子在接近[具体值]时具有增强的 - 轨道态密度。这导致这些原子与衬底之间的交换耦合，从而解释了YSR态的边缘定位。
