Effect of isotopic disorder on Raman scattering spectra of crystals
Journal Article
·
· Optics and Spectroscopy
OSTI ID:457046
- Elores Joint-Stock Company, Tallinn (Ethiopia)
The first results of a quantitative study into the effect of isotopic disorder on optical phonon states, revealed as a broadening and shift of LO({Gamma}) phonon lines in second-order Raman scattering spectra of LiH{sub x}D{sub 1-x} crystals, are presented. The presence in the spectra of a local vibration at small values of x and the two-mode character of the LO{Gamma} phonons for x {le} 0.45, together with the substantial broadening of the LO({Gamma}) phonon scattering lines, suggest the presence of a considerable isotopic disorder effect, which implies unambiguously strong LO({Gamma}) phonon scattering. Additional supporting evidence comes from the disagreement of the above experimental finding with the coherent-potential-model predictions for the case of weak phonon scattering. 21 refs., 3 figs.
- OSTI ID:
- 457046
- Journal Information:
- Optics and Spectroscopy, Journal Name: Optics and Spectroscopy Journal Issue: 3 Vol. 78; ISSN OPSUA3; ISSN 0030-400X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Vibrational band modes in germanium: Isotopic disorder-induced Raman scattering
Comparison of the phonon spectra of sup 70 Ge and natural Ge crystals: Effects of isotopic disorder
Multiphonon Raman and infrared spectra of isotopically controlled diamond
Journal Article
·
Sun Mar 14 23:00:00 EST 1993
· Physical Review Letters; (United States)
·
OSTI ID:6951969
Comparison of the phonon spectra of sup 70 Ge and natural Ge crystals: Effects of isotopic disorder
Journal Article
·
Thu Feb 14 23:00:00 EST 1991
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:5736487
Multiphonon Raman and infrared spectra of isotopically controlled diamond
Journal Article
·
Tue Sep 01 00:00:00 EDT 1998
· Physical Review, B: Condensed Matter
·
OSTI ID:644914