Optical mode crossing is not a plausible explanation for the new broad Brillouin doublet nor for the strong acoustic anomalies observed at low temperatures in SrTiO3. Data presented to support that explanation are also inconclusive.
Athanasios Nenes, Paraskevi Georgakaki
Michael Lehning, Dylan Stewart Reynolds, Michael Haugeneder
Isabella Di Lenardo, Lucas Arnaud André Rappo, Rémi Guillaume Petitpierre, Marion Kramer