交错磁体:磁性研究的新范式与未来机遇
Altermagnets:a new paradigm in magnetism, and future prospects
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摘要:
自旋的排列交织出千变万化的磁性图景,使磁学成为凝聚态物理中最活跃且最深刻的研究前沿之一。文章介绍近年来交错磁体的提出如何开启了对第三类磁相的探究之路。这一新兴磁相的显著特征在于自发破缺的时间反演对称性、反平行磁有序和交错自旋劈裂的能带结构共存、对称性约束的零净磁矩。交错磁体融合传统铁磁体与反铁磁体的双重特性,孕育出一系列新奇物理现象,包括能带简并的解除、反常与自旋输运效应、磁光响应以及手性磁子等。这些现象不仅深化了对磁性的理解,也为探索非常规磁有序提供了新的理论框架与实验契机。值得注意的是,理论与实验的同步发展正在使交错磁性从概念走向实践。
Abstract:The intricate arrangements of spins give rise to a wealth of magnetic phenomena, establishing magnetism as one of the most active and profound frontiers in condensed matter physics. Recently, the advent of altermagnets has opened a new avenue for exploring a third class of magnetic phases. This emergent phase is distinguished by the coexistence of spontaneously broken time-reversal symmetry, antiparallel magnetic order, alternating spin-splitting band structures, and symmetry-protected compensated magnetization. Integrating the advantages of both conventional ferromagnets and antiferromagnets, altermagnets enable a range of novel physical phenomena beyond traditional magnetic paradigms, including the lifted spin degeneracy, anomalous and spin transport effects, magnetooptical effects, and chiral magnons. These advances not only deepen our understanding of magnetism but also provide new theoretical frameworks and experimental opportunities for probing unconventional magnetic orders. Notably, theoretical predictions and experimental validations are advancing in parallel, with their synergy propelling altermagnetism from an emerging concept toward potential applications.
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Key words:
- altermagnet /
- spin group /
- nonrelativistic spin splitting /
- anomalous transport .
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