Raman spectrum of AgGaS2
- 7 October 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (19) , 3241-3250
- https://doi.org/10.1088/0022-3719/8/19/023
Abstract
The first- and second-order Raman spectrum of AgGaS2 has been measured at room temperature. A careful analysis of the data gives phonon frequencies for the various representations at the zone centre which differ considerably from the results of two other investigations, and reasons are given why previous determinations are probably in error. The present results indicate that AgGaS2 cannot be regarded as a small perturbation of a zincblende structure, but they are in accord with the predictions of a recent model calculation by Bettini (1974). A comparison of the optic modes for AgGaS2, CuGaS2 and CuAlS2 shows regularities which are also apparent in the analogous phosphides, and it is inferred that there is an unobserved high-frequency B1 mode in both CuAlS2 and CdSiP2.Keywords
This publication has 16 references indexed in Scilit:
- Zone‐centered phonons in ternary compounds of chalcopyrite structurePhysica Status Solidi (b), 1975
- Optical Phonons in ZnGeP2 and CdGeP2Physica Status Solidi (b), 1974
- Lattice dynamics of AgGaS2Journal of Physics C: Solid State Physics, 1974
- Optical Phonons in CdSiP2Physica Status Solidi (b), 1974
- Automation techniques for Raman spectroscopyJournal of Raman Spectroscopy, 1974
- Covalency and Deformability of Ag+‐Ions in the Lattice Dynamics of Silver HalidesPhysica Status Solidi (b), 1972
- Vibrational Modes in ZnSiPhysical Review B, 1970
- Optical activity in a non-enantiomorphous crystal: AgGaS2Acta Crystallographica Section A, 1968
- Optical Activity in a Non-enantiomorphous Crystal Silver Gallium SulphideNature, 1967
- Effect of Invariance Requirements on the Elastic Strain Energy of Crystals with Application to the Diamond StructurePhysical Review B, 1966