Altermagnetism classification

Abstract Altermagnets are magnetic states with fully compensated spins and broken PT (PT: parity times time reversal) symmetry (i.e., spin-split bands). We classify three kinds of altermagnets in terms of broken P and T. Furthermore, strong altermagnets have spin-split bands without spin-orbit coupl...

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Bibliographic Details
Main Authors: Sang-Wook Cheong, Fei-Ting Huang
Format: Article
Language:English
Published: Nature Portfolio 2025-04-01
Series:npj Quantum Materials
Online Access:https://doi.org/10.1038/s41535-025-00756-5
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Summary:Abstract Altermagnets are magnetic states with fully compensated spins and broken PT (PT: parity times time reversal) symmetry (i.e., spin-split bands). We classify three kinds of altermagnets in terms of broken P and T. Furthermore, strong altermagnets have spin-split bands without 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 spin rotation operations.
ISSN:2397-4648