Fender Shannon S, Gonzalez Oscar, Bediako D Kwabena
Department of Chemistry, University of California, Berkeley, California 97420, United States.
Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
J Am Chem Soc. 2025 Jan 22;147(3):2257-2274. doi: 10.1021/jacs.4c14503. Epub 2025 Jan 9.
Altermagnets have been recently introduced as a classification of collinear, spin compensated magnetic materials that host net-zero magnetization yet display some electronic behaviors typically associated with noncompensated magnetic materials like ferromagnets. The emergence of such properties are a consequence of spin-split bands that arise under specific symmetry conditions in the limit of zero spin-orbit coupling. In this Perspective, we summarize the fundamental criteria for realizing an altermagnetic phase and present a qualitative electronic band structure derivation and symmetry analysis through chemical principles. We then discuss the properties that make altermagnets distinctive candidates for charge-to-spin conversion elements in spintronic devices and provide a brief review of some altermagnetic candidate materials. Finally, we discuss future directions for altermagnetism and highlight opportunities for chemists to advance this emerging field.
交替磁体最近被引入作为一类共线、自旋补偿的磁性材料，这类材料具有零净磁化强度，但却表现出一些通常与非补偿磁性材料（如铁磁体）相关的电子行为。这些特性的出现是自旋分裂能带的结果，自旋分裂能带在零自旋轨道耦合极限下的特定对称条件下产生。在这篇展望文章中，我们总结了实现交替磁相的基本标准，并通过化学原理进行了定性的电子能带结构推导和对称性分析。然后，我们讨论了使交替磁体成为自旋电子器件中电荷到自旋转换元件独特候选材料的特性，并简要回顾了一些交替磁体候选材料。最后，我们讨论了交替磁学的未来方向，并强调了化学家推动这一新兴领域发展的机会。
