Multiferroic Collinear Antiferromagnets with Hidden Altermagnetic Spin Splitting

Author(s): Jin Matsuda, Hikaru Watanabe, and Ryotaro Arita Altermagnets exhibit nonrelativistic spin splitting due to the breaking of time-reversal symmetry and have been garnering significant attention as promising materials for spintronic applications. In contrast, conventional antiferromagnets without spin splitting seem to not have any symmetry breaking… [Phys. Rev. Lett. 134, 226703] Published Thu Jun 05, 2025