Low Frequency Exciton and Raman Scattering Spectra of CoCO3

1979 ◽  
pp. 237-247
Author(s):  
Yu. A. Popkov ◽  
V. V. Eremenko ◽  
N. A. Sergienko
Keyword(s):  
Raman Scattering ◽  
Low Frequency ◽  
Scattering Spectra ◽  
Raman Scattering Spectra

Experimental Study of the Liquid-Glass Transition in an Inorganic Polymer Li0.5Na0.5PO3

1995 ◽  
Vol 407 ◽  
Author(s):  
B. Rufflé ◽  
S. Beaufils ◽  
Y. Délugeard ◽  
G. Coddens ◽  
J. Etrillard ◽  
...  
Keyword(s):  
Experimental Study ◽  
Glass Transition ◽  
Raman Scattering ◽  
Viscous Flow ◽  
Liquid Glass ◽  
Low Frequency ◽  
Glass Forming ◽  
Scattering Spectra ◽  
Temperature Ranges ◽  
Raman Scattering Spectra

ABSTRACTNew experimental results obtained with various techniques on a less-studied glass-forming system are presented. At low frequency, a secondary βslow-process, decoupled from the viscous flow, is observed by 3 1P NMR. Raman scattering spectra and coherent neutron scattering spectra has been obtained in wide frequency and temperature ranges showing the same qualitative features for the Boson peak while the quasielastic contribution seems to differ markedly.

STRUCTURE AND TRANSPORT PROPERTIES OF Pr1-xSr1+xCoO4

2008 ◽  
Vol 22 (32) ◽  
pp. 3195-3205 ◽  
Author(s):  
M. LI ◽  
S. L. HUANG ◽  
Z. M. LV ◽  
J. L. ZHANG ◽  
H. Y. WU ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Low Frequency ◽  
X Ray Diffraction ◽  
Phonon Interaction ◽  
Band Shift ◽  
X Ray ◽  
Electron Phonon Interaction ◽  
Scattering Spectra ◽  
Raman Scattering Spectra ◽  
Dramatic Variation

Powder X-ray diffraction, Raman scattering and infrared spectra at different doping (x = 0 ~ 0.5) on polycrystalline Pr 1-x Sr 1+x CoO 4 were performed. With increasing x, the shift of Raman scattering spectra is due to the enhancement of electron–phonon interaction along the c-axis. The contrary variation of infrared in wavenumber comes from the weakening electron–phonon interactions in the ab plane. There is a dramatic variation in resistivity as x increases, which is also caused by increasing carrier concentration and is related to the band shift. For Pr 1-x Sr 1+x CoO 4, both A1g bands shift to low frequency and reach a minimum when x = 0.3 and the resistivity of Pr 0.7 Sr 1.3 CoO 4 is the smallest at room temperature.

Vibrations de réseau de quelques dérivés dihalogénés du benzène

1979 ◽  
Vol 57 (14) ◽  
pp. 1814-1822 ◽  
Author(s):  
J. Serrier ◽  
F. Brehat ◽  
B. Wyncke ◽  
A. Hadni
Keyword(s):  
Raman Scattering ◽  
Long Range ◽  
Infrared Absorption ◽  
Low Frequency ◽  
Lattice Mode ◽  
Long Range Interactions ◽  
Scattering Spectra ◽  
Raman Scattering Spectra ◽  
Experimental Values ◽  
Lattice Modes

Low frequency lattice modes of p-C6H4X2 (X = Cl, Br, I), m-C6H4I2, and o-C6H4I2 were observed by infrared absorption. Raman scattering spectra were recorded in the case of m-C6H4I2.When atomic positions were known in the unit cell (p-C6H4X2), the lattice mode frequencies were computed by the GF matrix method.The agreement between calculated and experimental values is reasonable although we did not consider the multipole–multipole long range interactions.

Raman Investigation of Aluminum-Doped 4H-SiC

2013 ◽  
Vol 740-742 ◽  
pp. 357-360 ◽  
Author(s):  
Sandrine Juillaguet ◽  
Pawel Kwasnicki ◽  
Hervé Peyre ◽  
Leszek Konczewicz ◽  
Sylvie Contreras ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Low Frequency ◽  
Frequency Range ◽  
Scattering Spectra ◽  
Raman Scattering Spectra ◽  
P Type

Raman scattering spectra have been collected on p-type 4H-SiC samples doped with aluminum up to 5×1019atoms per cubic cm. The distortion and asymmetry of FTA modes which appear in the low frequency range has been probed in great details. We show that, using standard Fano formulae with three parameters per mode, one can successively fit all FTA modes profiles in the concentration range 2×1016– 5×1019Al.cm-3.

scholarly journals Спонтанное и вынужденное комбинационное рассеяние света в протиевой и дейтериевой воде -=SUP=-*-=/SUP=-

2019 ◽  
Vol 126 (6) ◽  
pp. 765
Author(s):  
В.С. Горелик ◽  
Dongxue Bi ◽  
Ю.П. Войнов ◽  
А.И. Водчиц ◽  
В.А. Орлович ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Fiber Optics ◽  
Stimulated Raman Scattering ◽  
Low Frequency ◽  
Picosecond Laser ◽  
Structural Defects ◽  
Spontaneous Raman Scattering ◽  
Scattering Spectra ◽  
Raman Scattering Spectra ◽  
Stimulated Raman

Comparison of Raman scattering spectra for different samples of protium and deuterium water has been done. Registration of spectra was held with the help of fiber optics technique and BWS465-785H small sized spectrometer. For excitation of spontaneous Raman scattering spectra the continuously working laser (λ=785 nm) has been used. The essential differences of low frequency Raman scattering spectra for different water samples have been observed. Such differences have been explained by the presence of structural defects and imperfections in analyzed water. Stimulated Raman scattering spectra in protium and deuterium water have been observed with excitation by picosecond laser pulses with wavelength 532 nm. Low frequency Raman satellites in Stimulated Raman scattering spectra have been recorded, related to clusters of several water molecules.

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