{"title":"Altermagnetism classification","authors":"Sang-Wook Cheong, Fei-Ting Huang","doi":"10.1038/s41535-025-00756-5","DOIUrl":null,"url":null,"abstract":"<p>Altermagnets are magnetic states with fully compensated spins and broken <b>PT</b> (<b>PT</b>: parity times time reversal) symmetry (i.e., spin-split bands). We classify three kinds of altermagnets in terms of broken <b>P</b> and <b>T</b>. 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.</p>","PeriodicalId":19283,"journal":{"name":"npj Quantum Materials","volume":"139 1","pages":""},"PeriodicalIF":6.2000,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"npj Quantum Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1038/s41535-025-00756-5","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
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.
期刊介绍：
npj Quantum Materials is an open access journal that publishes works that significantly advance the understanding of quantum materials, including their fundamental properties, fabrication and applications.
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