The study finds evidence that local inversion symmetry breaking at domain walls in LaAlO3 enables anharmonic coupling between A1g and Eg phonons, observed via cross-peaks in 2D Raman-THz spectroscopy.
Miranda, Phonon website: Visualize phonon vibra- tional modes,https://henriquemiranda.github.io/ phononwebsite/(2025), accessed: 2025-11-19
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Anharmonic phonon coupling enabled by local inversion symmetry breaking at domain walls in ferroelastics
The study finds evidence that local inversion symmetry breaking at domain walls in LaAlO3 enables anharmonic coupling between A1g and Eg phonons, observed via cross-peaks in 2D Raman-THz spectroscopy.