超旋铁磁体
Hyperspin Altermagnets
- Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area（粤港澳大湾区量子科学中心）
- School of Interdisciplinary Science, Beijing Institute of Technology（北京理工大学跨学科学院）
- Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), and School of Physics, Beijing Institute of Technology（北京理工大学先进光电子量子架构与测量教育部重点实验室及物理学院）
- Department of Physics, Southern University of Science and Technology（南方科技大学物理系）
- Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute（伦斯勒理工学院物理、应用物理与天文学系）
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), TD Lee institute, School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院人工结构量子控制教育部重点实验室及TD李研究所）
- Hefei National Laboratory（合肥国家实验室）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文提出超旋概念，揭示非共线磁体中与哈密顿量对易的是超旋而非自旋，并将其归类为超旋交错磁体，为探索非共线磁体提供新框架。
AI中文摘要：
自旋在k空间中的量子行为是识别交错磁体（AMs）作为第三种基本共线磁性的关键。相比之下，非共线磁体虽然在自然界中丰富存在，但缺乏明确的自旋量子数，由此产生的自旋织构往往高度复杂，这限制了它们在下一代自旋电子学应用中的潜力。在此，我们提出超旋（hyperspin）概念，它存在于更高维空间中，以解决这些缺陷。通过分析一类非共线磁体中自旋与哈密顿量之间的对易关系，我们揭示出与哈密顿量对易的是超旋，而非通常的自旋。出乎意料的是，这些非共线磁体在k空间中也应表现出像共线AMs那样的共线自旋劈裂能带。因此，我们将此类非共线磁体归类为超旋交错磁体（HAMs），以区别于通常的共线AMs。我们的理论阐明了AMs和HAMs的基础物理，并为探索可能具有其他类型守恒量的广泛非共线磁体提供了框架。
英文摘要：
The behavior of spin quantum in k-space is key to identifying altermagnets (AMs) as the third kind of fundamental collinear magnetism. In contrast, non-collinear magnets,though abundant in nature,lack well-defined spin quantum numbers, and the resulting spin textures are often highly complex, which limits their potential for next-generation spintronic applications. Here we propose hyperspin, which lives in a higher-dimensional space, to address these drawbacks. Through analyzing the commutation relations between spin and Hamiltonian for a class of non-collinear magnets, we reveal it is a hyperspin, rather than the usual spin, that commutes with Hamiltonian. Unexpectedly, these non-collinear magnets should also show collinear spin-split bands in k-space like collinear AMs. We therefore classify such non-collinear magnets as hyperspin altermagnets (HAMs), as opposed to the usual collinear AMs. Our theory elucidates the fundamental physics of AMs and HAMs and provides a framework for exploring the wide range of non-collinear magnets that may possess other kinds of conserved quantities.
