Proposing Altermagnetic‐Ferroelectric Type‐III Multiferroics with Robust Magnetoelectric Coupling

Multiferroic materials, characterized by the coexisting of ferroelectric polarization (breaking space- inversion symmetry, 𝒫) and magnetism (breaking time-reversal symmetry, 𝒯), with strong magnetoelectric coupling, are highly sought after for advanced technological applications. Novel altermagnets, distinct from conventional magnets, have recently been revealed to exhibit unique spin polarization protected by crystal symmetry, which naturally overcomes the isolation of magnetism from ferroelectrics associated with spatial symmetry. In this study, a novel class of type-III multiferroics is proposed, which leverages the unique symmetry of altermagnets to enforce spin-ferroelectric locking, setting them apart…

• NN
  National Natural Science Foundation of China

  Award: 12304141
• NS
  Natural Science Foundation of Shandong Province

  Awards: ZR2023QA001, ZR2024ME022
• TS
  Taishan Scholar Foundation of Shandong Province

  Awards: tsqn202312209, tstp20221130