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Second‐Order Raman Spectra of RbCl, RbBr, and RbI Crystals
Author(s) -
Goel C. M.,
Dayal B.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220750233
Subject(s) - polarizability , raman spectroscopy , phonon , rubidium , chemistry , spectral line , molecular physics , eigenvalues and eigenvectors , tensor (intrinsic definition) , atomic physics , condensed matter physics , physics , optics , quantum mechanics , mathematics , geometry , molecule , organic chemistry , potassium
The polarized second order Raman spectra of three rubidium halide crystals, namely RbCl, RbBr, and RbI are computed on the basis of the theory proposed by Born and Brad‐burn, taking into account first as well as second neighbour polarizability coefficients. The three‐body force shell model is employed to determine the phonon frequencies, the phonon eigenvectors, and the polarizability tensor. The polarizability coefficients are assumed to be adjustable parameters. It is found that in addition to all the first neighbour coefficients, only eight second neighbour coefficients are sufficient to obtain good agreement between the experimental and the theoretical spectra.