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<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>

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Altermagnetism classification

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月12日

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  • Sang-Wook Cheong,
  • Fei-Ting Huang

摘要

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.