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Optical Phonons in ZnGeP 2 and CdGeP 2
Author(s) -
Bettini M.,
Miller A.
Publication year - 1974
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.2220660221
Subject(s) - phonon , raman spectroscopy , ternary operation , materials science , raman scattering , crystallography , condensed matter physics , chalcopyrite , molecular physics , chemistry , physics , copper , optics , computer science , metallurgy , programming language
The phonon spectra of ZnGeP 2 and CdGeP 2 , determined by Raman scattering on single crystals at room and liquid nitrogen temperature, are presented. The close coincidence of the zone center phonon energies of ZnGeP 2 with the corresponding τ, X, and W modes of its isoelectronic analogue, GaP, bears out the expected similarity of lattice vibrations in ternary chalcopyrite compounds and binary zincblende materials. Differences between ZnGeP, and CdGeP 2 can be attributed to mass and force constant differences when Zn is substituted by the heavier Cd atom.