Altermagnetic Néel order can generate electric polarization through spin-dependent metal-ligand hybridization, with a symmetry-derived locking P_z ∝ cos(2ϕ) demonstrated in monolayer MgFe2N2.
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Altermagnetic type-II Multiferroics with N\'{e}el-order-locked Electric Polarization
Altermagnetic Néel order can generate electric polarization through spin-dependent metal-ligand hybridization, with a symmetry-derived locking P_z ∝ cos(2ϕ) demonstrated in monolayer MgFe2N2.