Soft phonon and the central peak at the cubic-to-tetragonal phase transition in SrTiO${}_3$

Avishek Maity, Klaus Habicht, Michael Merz +8

The continuous displacive phase transition in SrTiO${}_3$ near $T_c\approx 105$ K features a central elastic peak in neutron scattering investigations at temperatures above $T_c$, i…