Ferroelectric Switchable Altermagnetism

We propose a novel ferroelectric switchable altermagnetism effect: the reversal of ferroelectric polarization is coupled to the switching of altermagnetic spin splitting. We demonstrate the design principles for the ferroelectric altermagnets and the additional symmetry constraints necessary for switching the spin splitting through flipping the electric polarization based on the state-of-the-art spin-group symmetry techniques. We find 22 ferroelectric altermagnets by screening through the 2001 experimental reported magnetic structures in the MAGNDATA database and identify two of them as ferroelectric switchable altermagnets. Using the hybrid improper ferroelectric material [C(NH_{2})_{3}] Cr(HCOO)_{3} as an…

• EC
  European Commission
• NN
  National Natural Science Foundation of China

  Awards: 12274194, 12474232
• NS
  Natural Science Foundation of Guangdong Province

  Award: 2021A1515110389
• CN
  Consiglio Nazionale delle Ricerche
• ST
  Science, Technology and Innovation Commission of Shenzhen Municipality

  Award: JCYJ20210324104812034
• SU
  Southern University of Science and Technology
• GP
  Guangdong Provincial Key Laboratory Of Computational Science And Material Design

  Award: 2019B030301001
• NK
  National Key Research and Development Program of China

  Award: 2019YFA0704900
• SS
  Shenzhen Science and Technology Innovation Program

  Awards: RCJC20221008092722009, 20231117091158001
• KI
  Korea Institute for Advanced Study

  Award: CG092501