Phonon anharmonicity and soft-phonon mediated structural phase transition in $C{s}_{3}B{i}_{2}B{r}_9$

Debabrata Samanta, Aritra Mazumder, Sonu Pratap Chaudhary +4

We have carried out temperature-dependent x-ray diffraction and Raman scattering experiments on powder $C{s}_{3}B{i}_{2}B{r}_9$. Trigonal to monoclinic structural transition at around 95 K i…