Low-Temperature Phase of the Cd${}_2$Re${}_2$O${}_7$ Superconductor: Ab initio Phonon Calculations and Raman Scattering

Konrad J. Kapcia, Maureen Reedyk, Mojtaba Hajialamdari +5

Using an {\it ab initio} approach, we report a phonon soft mode in the tetragonal structure described by the space group $I{4}_{1}22$ of the $1$ K $5d$ superconductor Cd${}_2$Re${}_2$O$_…