Oxygen ions carry approximately 90% of the angular momentum in coherently driven circular phonons in SrTiO3, quantified by ultrafast x-ray diffraction following circular THz excitation.
4: Real space atomic motions and phonon angular momentum
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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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Quantifying angular momentum of coherently driven circular phonons
Oxygen ions carry approximately 90% of the angular momentum in coherently driven circular phonons in SrTiO3, quantified by ultrafast x-ray diffraction following circular THz excitation.
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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.