AI 中文总结
该研究通过近藤型模型和第一性原理计算，预测了具有Altermagnetism的Janus FeX0.5Y0.5单层，其自旋劈裂显著、拓扑带隙达51.4 meV、奈尔温度415 K，可调控谷极化，为超导自旋电子学提供新策略。
AI 中文摘要
实现超导材料中的自旋分辨电子性质是一个关键前沿领域，既提供新颖的基础物理，又为无耗散自旋基器件提供潜力。本文中，我们利用近藤型模型和第一性原理计算，预测了一系列源自铁基超导体（如FeSe、FeTe和FeS）的Janus FeX0.5Y0.5单层。这些Janus结构展现出显著的自旋劈裂电子态、大拓扑带隙（51.4 meV）和高奈尔温度（415 K）。我们进一步揭示，谷极化可通过施加面内应变有效调控，且所得的谷极化反常霍尔电导率可通过移动费米能级进行操纵。本研究提出了一种基于Altermagnetism的新策略，用于在超导体系中设计自旋劈裂态，并推动超导自旋电子学的进一步探索。
英文摘要
Realizing the spin-resolved electronic properties in superconducting materials stands as a critical frontier, offering both novel fundamental physics and potential for dissipationless spin-based devices. Here, we predict a series of Janus FeX0.5Y0.5 monolayers derived from iron-based superconductors (e.g., FeSe, FeTe, and FeS) by using Kondo-type model and first-principles calculations. These Janus structures exhibit significant spin-splittingelectronic states, large topological band gaps (51.4 meV) and high Néel temperatures (415 K). We further reveal that valley polarization can be effectively tuned via applied in-plane strain and the resulting valley-polarized anomalous Hall conductivity can be manipulated by shifting the Fermi level. Our work suggests a new strategy based on altermagnetism for engineering spin-splitting states in superconducting systems and inspires further exploration of superconducting spintronics.
