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Raman Scattering from Vibrational Modes in Layered Cd x Hg 1– x I 2 Solid Solution
Author(s) -
Anedda A.,
Bongiovanni G.,
Fortin E.
Publication year - 1988
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.2221460237
Subject(s) - raman spectroscopy , raman scattering , phonon , normal mode , molecular vibration , degeneracy (biology) , vibration , solid solution , materials science , low frequency , mode (computer interface) , frequency shift , molecular physics , chemistry , condensed matter physics , atomic physics , analytical chemistry (journal) , physics , optics , quantum mechanics , bioinformatics , chromatography , astronomy , computer science , metallurgy , biology , operating system
Raman spectra at 15 and 300 K of Cd x Hg 1– x I 2 solid solutions for 0 < x < 0.44 are investigated. One mode behaviour is observed for the low frequency phonons and the A 1g mode, while a two mode behaviour is exhibited by the higher frequency vibrations. The expected mass, force, and temperature induced splitting of the B 1g 2 and E g 1 degenerated modes is not observed. This fact proposes another different experimental evidence of the low Raman cross section of the B 1g 2 rigid layer mode. For the first time the degeneracy of the E g 2 mode with the A 1g is lifted and experimentally found.