Line Plot from Scientific Research

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Phonon dispersion of cubic STO ( = 0°) along the R-Γ-R direction calculated from an ab initio approach. The coloured lines highlight the transverse-optical phonon branch of the driven infrared-active mode Q IR (magenta), strain waves (orange) and the FE soft mode (blue), all at the Brillouin-zone centre. The red-coloured line is the AFD mode at the zone edge. The negative frequencies represent unstable (soft) phonon modes.
#Line Plot#Phonon Dispersion#STO#Ab Initio Calculation#Infrared-active Mode#Strain Waves#FE Soft Mode#AFD Mode
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