PICOSECOND STUDIES OF LUMINESCENCE OF CIS POLYACETYLENE
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS 16:20 (1983) L729-L732
PICOSECOND TIME-RESOLVED LUMINESCENCE OF GATE
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA 73:10 (1983) 1386-1386
Observation of coupled amplitude modes in the Raman spectrum of incommensurate Na2 CO3
Journal of Physics C: Solid State Physics 14:18 (1981)
Abstract:
Temperature-dependent phonons have been observed in the Raman spectrum of incommensurate psi -Na2CO3. Two modes are identified as q approximately=0 librational modes of the CO32- groups, which soften at the alpha - beta transition at Tc1=763K. At T c2=633K a modulation of the structure sets in which is believed to be due to a softening of a librational mode at the incommensurate wavevector q*. Two additional lines that the authors observe in the gamma -phase are assigned to coupled amplitude modes that arise from the coupling of acoustic and librational branches at q=q*.Structural phase transitions in K2 CO3 (Raman scattering study)
Journal of Physics C: Solid State Physics 14:11 (1981) 1611-1618