{"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":5.4000,"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.