Ultrafast Critical Dynamics of Ferroelectric Phase Transition in Pb${}_{1-x}$Ge${}_x$Te

Rong Lu, Muneaki Hase, Masahiro Kitajima +2

Transient responses of the electronic excitation and coherent soft phonon are investigated both above and below the ferroelectric phase transition temperature T${}_c$ in Pb${}_{1-x}$…