论文标题
Fe（TE，SE）高温超导体中的拓扑磁线缺陷
Topological magnetic line defects in Fe(Te,Se) high-temperature superconductors
论文作者
论文摘要
传统超导体上方的磁杂质链是实现Majorana模式的有前途的平台。由于铁原子中强烈的hund耦合，在磁性状态附近已知铁基高温超导体。在这里，我们建议在Fe（Se，Te）超导体中缺少Te/Se阴离子的线缺陷提供了与Rashba Spin-Orbit耦合的内在抗磁磁性（AFM）链的实现。在传统的观点上，在这些AFM链端可以强烈地生成Majorana零模式（MZM）。通过扫描隧道显微镜（STM）测量值，这些结果可以始终如一地解释了单层Fe（TE，SE）/srtio $ _3 $线缺陷中零能端状态的最新实验观察。我们的研究不仅证明了天然线路缺陷，新兴磁性和拓扑超导性之间的前所未有的相互作用，而且还探索了Majorana Fermions的高温平台。
Magnetic impurity chains on top of conventional superconductors are promising platforms to realize Majorana modes. Iron-based high-temperature superconductors are known in the vicinity of magnetic states due to the strong Hund's coupling in iron atoms. Here we propose that the line defects with missing Te/Se anions in Fe(Se,Te) superconductors provide the realization of intrinsic antiferromagnetic(AFM) chains with Rashba spin-orbit coupling. Against conventional wisdom, Majorana zero modes (MZMs) can be robustly generated at these AFM chain ends. These results can consistently explain the recent experimental observation of zero-energy end states in line defects of monolayer Fe(Te,Se)/SrTiO$_3$ by scanning tunneling microscopy (STM) measurements. Our research not only demonstrates an unprecedented interplay among native line defect, emergent magnetism and topological superconductivity but also explores a high-temperature platform for Majorana fermions.
