Far-infrared soft mode behavior in PST thin films

S. Kamba, M. Berta, M. Kempa +3

Temperature dependences of the optic phonons in $\mathrm{PbS}{\mathrm{c}}_{1/2}\mathrm{T}{\mathrm{a}}_{1/2}{\mathrm{O}}_3$ sol-gel films deposited on sapphire substrates were studied by means of Fourier transform far-infrared t…