Raman Scattering Study of Interactions of Cyanide Impurities in Potassium-Chloride Under Variation of Temperature and Concentration (near-Neighbor Pairing, Davydov Splitting, Motional Narrowing)
Grant, Marion Billingsley
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https://hdl.handle.net/2142/77379
Description
Title
Raman Scattering Study of Interactions of Cyanide Impurities in Potassium-Chloride Under Variation of Temperature and Concentration (near-Neighbor Pairing, Davydov Splitting, Motional Narrowing)
Author(s)
Grant, Marion Billingsley
Issue Date
1985
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Condensed Matter
Language
eng
Abstract
The interactions of CN('-) impurities in KCl have been investigated by Raman light scattering in the spectral region of the CN('-) stretching frequency. The low temperature width and observed motional narrowing of the primary peak assigned to isolated cyanide impurities is attributed to interaction with non-near-neighbor defects in the lattice. A splitting has been observed in a spectral feature attributed to CN('-) pairs and attributed to a dynamical interaction (Davydov splitting). This suggests a model for nearest-neighbor pairing. The relative positions and intensities of downshifted sidebands are explained by this model.
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