PT-symmetric antiferromagnets support antiferro-chiral phonons whose sublattice-staggered angular momentum couples to the Neel vector via molecular Berry curvature.
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Multiferrons are defined as elementary excitations with both electric and magnetic character that tilt polarization, generate magnetization via dynamical multiferroicity, and carry quadrupole and octupole moments, as computed for LiNbO3.
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Antiferro-Chiral Phonons in $\mathcal{P}\mathcal{T}$-Symmetric Antiferromagnets
PT-symmetric antiferromagnets support antiferro-chiral phonons whose sublattice-staggered angular momentum couples to the Neel vector via molecular Berry curvature.
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Lattice excitations with finite polarization and magnetization
Multiferrons are defined as elementary excitations with both electric and magnetic character that tilt polarization, generate magnetization via dynamical multiferroicity, and carry quadrupole and octupole moments, as computed for LiNbO3.