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Infrared and Raman Spectra of Germanium Dichalcogenides I. GeS 2
Author(s) -
Popović Z. V.,
Stolz H. J.
Publication year - 1981
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.2221060138
Subject(s) - raman spectroscopy , germanium , phonon , spectral line , anisotropy , symmetry (geometry) , condensed matter physics , infrared , materials science , chemistry , molecular physics , optics , physics , optoelectronics , silicon , mathematics , geometry , astronomy
The polarized IR reflectivity and transmission spectra as well as the polarized Raman spectra of single crystalline GeS 2 are measured. From a comparison with a factor group analysis most of the expected 141 optically active phonons are identified with their symmetry type. From the observation of rigid layer modes and from the Davydov splitting a force constant anisotropy of about 100 between interlayer and intralayer forces is deduced.