AI RESEARCH
Continuous PT-Symmetry Breaking as a Design Variable for Giant Altermagnetic Spin Splitting
arXiv CS.LG
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ArXi:2604.10173v1 Announce Type: cross Magnetic point-group analysis classifies altermagnets but returns only a binary symmetry verdict, leaving spin-splitting energy (SSE) inaccessible without spin-polarized density functional theory (DFT). This binary ceiling is not fundamental. Sublattice symmetry breaking is promoted here to a continuous, DFT-free scalar -- the Motif Symmetry-Breaking Index (MSBI) -- that quantifies $\mathcal{PT}$-symmetry breaking between antiparallel magnetic motifs directly from crystal coordinates.