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Altermagnetism Classification

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arxiv 2409.20456 v6 pith:TP7OFNDE submitted 2024-09-30 cond-mat.mtrl-sci

Sang-Wook Cheong , Fei-Ting Huang This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords altermagnetsbrokenspinmagneticsymmetryaltermagnetismbandscoupling
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Altermagnets are defined as magnetic states with fully compensated spin angular momenta (spins) and broken PT (P: parity, T: time reversal, PT: parity times time reversal) symmetry. We classify three kinds of altermagnets: M-type: broken T symmetry and nonzero net magnetic moments, S-type: broken T symmetry and zero net magnetic moments, and A-type: unbroken T and broken P symmetries. Furthermore, strong altermagnets have spin split bands through exchange coupling in the non-relativistic limit, i.e., for zero spin-orbit coupling (SOC), and weak altermagnets has spin split bands only with non-zero SOC. These strong vs. weak altermagnets can be identified from the total number of symmetric orthogonal spin rotation operations. These classifications of altermagnets will be an essential guidance for the future research on altermagnetism.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Spin dynamics and magnetic excitations of quasi-1D spin chain Ca$_3$ZnMnO$_6$

    cond-mat.str-el 2025-02 conditional novelty 6.0 of 10

    Ca3ZnMnO6 shows three-dimensional gapped magnetic excitations below 25 K despite a quasi-one-dimensional exchange hierarchy, and the authors propose it as a candidate M-type altermagnet.

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