Reinterpretation of Wavelength-Modulated Absorption in SrTiO3without Coexisting Phases

In a recently reported measurement of the wavelength-modulated absorption of SrTi${\mathrm{O}}_3$, the results were interpreted as evidence for the coexistence of two phases over a temperature range of 60 K about the 105-K phase transition. We refute that interpretation by proposing an alternative which is necessary and sufficient to be fully consistent with the known properties of SrTi${\mathrm{O}}_3$ and which is unconnected with the phase transition. We also propose an experimental test of the validity of this new interpretation.