Altermagnetism with non-collinear spins

被引：76
作者：
Cheong, Sang-Wook [1 ,2 ]
Huang, Fei-Ting [1 ,2 ]
机构：
[1] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA
[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
来源：
NPJ QUANTUM MATERIALS | 2024年 / 9卷 / 01期
关键词：
MAGNETORESISTANCE;
D O I：
10.1038/s41535-024-00626-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Altermagnetism is introduced as a category of magnetic states with 'collinear' antiferromagnetic spins and alternating variations of local structures around spins in such a way that the symmetry allows typical ferromagnetic behaviors. Altermagnets exhibiting ferromagnetic behaviors without any external perturbations (type-I) turn out to belong to the ferromagnetic point group. Other altermagnets (type-II and type-III) can have ferromagnetic behaviors only with external perturbations such as electric current or stress, which conserve parity-time-reversal (PT) symmetry. All types of altermagnets themselves have broken PT symmetry. The concept of altermagnetism can be extended to accommodate non-collinear spins and multiple local-structure variations.
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页数：6
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